Thai Personal Income Tax — Yearly Return with Refund Support
Thai-source earners with annual income above ฿120,000 (single) or ฿220,000 (married) must file PND.90/91 by 31 March. Deductions include life insurance, RMF, SSF, donations, mortgage interest, and Easy E-Receipt allowances.
Thai Personal Income Tax — Yearly Return with Refund Support — overview and who it is for
Thai-source earners with annual income above ฿120,000 (single) or ฿220,000 (married) must file PND.90/91 by 31 March. Deductions include life insurance, RMF, SSF, donations, mortgage interest, and Easy E-Receipt allowances.
What matters here is that, "Thai Personal Income Tax — Yearly Return with Refund Support" sits inside our Tax, Accounting & Audit practice. The live path starts at "Consolidate annual income" and closes at "Track refund", typically By 31 March each year end to end, with service pricing from ฿1,500–8,000 — itemised up front so you can see what is our fee and what is a government charge.
The best fit is anyone who already meets "Thai-source income earners" and needs a usable outcome — for example Full refund entitlement — without burning weeks on a re-filing loop.
Eligibility criteria for Thai Personal Income Tax — Yearly Return with Refund Support
Worth flagging early, each criterion below has to be evidenced with primary documents rather than narrative. In Tax, Accounting & Audit matters the usual stumbling block is "Thai-source income earners", because the proof is typically issued by a different agency than the one receiving the file. We map what you hold against each rule and flag the gaps before filing.
- Thai-source income earners
- Foreigners resident ≥ 180 days
- Freelancers and consultants
Document checklist for Thai Personal Income Tax — Yearly Return with Refund Support
What matters here is that, the core set starts with "50-bis certificates from employer" and "Deductible receipts", both current-issue and internally consistent (names, dates, reference numbers). Foreign-issued papers must clear the full legalization chain first, then be translated by a Ministry of Justice-registered translator.
- 50-bis certificates from employer
- Deductible receipts
- SSF/RMF/insurance statements
How Thai Personal Income Tax — Yearly Return with Refund Support runs, step by step
Notably, we place a checkpoint before every irreversible step — especially "Track refund", where corrections get expensive once executed. You confirm content and cost at each decision node.
Typical end-to-end timeline: By 31 March each year · indicative service fee: ฿1,500–8,000 (government fees billed at actual rates).
- Consolidate annual income
- Maximize deductions
- e-File PND.90/91
- Track refund
What Thai Personal Income Tax — Yearly Return with Refund Support actually gets you
In practical terms, the first concrete outcome is Full refund entitlement — which matters more in real use than official notices suggest. The remaining items below are the downstream gains first-time applicants usually miss.
- Full refund entitlement
- Avoid penalties
- Next-year planning
Rejection triggers in Thai Personal Income Tax — Yearly Return with Refund Support matters
Across our Tax, Accounting & Audit casework the most common re-filing cause is "Late filing → ฿200 fine + 1.5%/month surcharge" — entirely preventable if checked before "Consolidate annual income" even begins.
- Late filing → ฿200 fine + 1.5%/month surcharge
- Missed Easy E-Receipt → forfeit ฿50k deduction
- Failure to report foreign income if resident → back-audit risk
Statutory basis for Thai Personal Income Tax — Yearly Return with Refund Support
Revenue Code §§40, 42, 47
We advise within the framework of Revenue Code §§40, 42, 47, and re-verify statutes, fee schedules, and agency practice every 90 days. If a new notice affects your matter, you hear about it before the next step is executed.
Frequently asked
Q1.Must expats file if in Thailand 6 months?
Yes, on Thai-source income
Q2.Where to file?
Online at rd.go.th or via our team
Cross-service questions, answered by the NYC Legal team
Which authority is responsible for arranging an interpreter for a cross-border business meeting, and where can it be filed?
Interpreters are matched to the setting: court and police station, government and embassy, medical, simultaneous booth work, and remote VRI/OPI. Government fees follow each authority's published rate, while professional fees are quoted per case by document count and destination, in full before work starts. Talk to the NYC Legal team on any business day — you get a working plan, not a generic price list. Private documents such as powers of attorney or contracts must first pass a notarial services attorney before they can enter the legalisation stage. Caution: each certification covers only what its own stamp states; it does not make a document automatically acceptable everywhere. Confirm the receiving authority's conditions case by case. The workable order is: check that the source document is complete and legible, translate it, certify the translation, file for legalisation with the Department of Consular Affairs, then obtain the destination embassy's certification — or an Apostille where the destination is a convention party. Caution: never unbind, trim or separate pages after an authority has sealed the set — doing so voids the certification. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
Does a court interpreter booked for a hearing require a certified translation to be attached?
For proceedings that go on the record we staff paired interpreters rotating every 20–30 minutes, per international conference practice. One coordinator owns the matter end to end and reports progress by LINE or email at the intervals you set. Send your documents for a free assessment at +66-83-249-4999 or contact@nyconlinetranslation.com. Request more than one certified set when several authorities are involved, because most receiving offices keep the certified copy and do not return it. Caution: processing time depends on each authority's queue, so allow buffer before the date the document is actually needed. Keep a digital copy of the finished certified set so it can be referenced if the destination asks for additional documents or a re-filing. Caution: each certification covers only what its own stamp states; it does not make a document automatically acceptable everywhere. Confirm the receiving authority's conditions case by case. The workable order is: check that the source document is complete and legible, translate it, certify the translation, file for legalisation with the Department of Consular Affairs, then obtain the destination embassy's certification — or an Apostille where the destination is a convention party. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
284. What are the notary fees for authenticating an expat condominium lease agreement in Thailand?
Every certified file passes three hands: a native-speaking translator, a subject-matter reviewer, and the responsible attorney who signs the certification page. Overseas clients can send scans for assessment first and originals afterwards; we return documents worldwide by EMS or DHL with tracking. Talk to the NYC Legal team on any business day — you get a working plan, not a generic price list. Send scans of every page for review before sending originals; that is when faded seals, passport-spelling mismatches and expired documents can still be corrected. Caution: processing time depends on each authority's queue, so allow buffer before the date the document is actually needed. Private documents such as powers of attorney or contracts must first pass a notarial services attorney before they can enter the legalisation stage. Caution: government fees follow the authority's published rate and are separate from professional fees; check the current rate on the official website first. The workable order is: check that the source document is complete and legible, translate it, certify the translation, file for legalisation with the Department of Consular Affairs, then obtain the destination embassy's certification — or an Apostille where the destination is a convention party. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
Which office must be approached first for certified documents for an infrastructure tender, and with which documents?
Tender and construction contracts have hard deadlines, so team capacity is locked and interim delivery checkpoints are set before the closing date. Government fees follow each authority's published rate, while professional fees are quoted per case by document count and destination, in full before work starts. Tell us where the document will be used and you will get a plan and a price the same business day. Send scans of every page for review before sending originals; that is when faded seals, passport-spelling mismatches and expired documents can still be corrected. Caution: never unbind, trim or separate pages after an authority has sealed the set — doing so voids the certification. Private documents such as powers of attorney or contracts must first pass a notarial services attorney before they can enter the legalisation stage. Caution: each certification covers only what its own stamp states; it does not make a document automatically acceptable everywhere. Confirm the receiving authority's conditions case by case. Request more than one certified set when several authorities are involved, because most receiving offices keep the certified copy and do not return it. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
Can an authorised representative handle a due-diligence document pack for a cross-border acquisition on the client's behalf?
Filings for regulators are certified to the tier the regulator specifies, not the tier that happens to be familiar. Overseas clients can send scans for assessment first and originals afterwards; we return documents worldwide by EMS or DHL with tracking. Talk to the NYC Legal team on any business day — you get a working plan, not a generic price list. The workable order is: check that the source document is complete and legible, translate it, certify the translation, file for legalisation with the Department of Consular Affairs, then obtain the destination embassy's certification — or an Apostille where the destination is a convention party. Caution: processing time depends on each authority's queue, so allow buffer before the date the document is actually needed. Request more than one certified set when several authorities are involved, because most receiving offices keep the certified copy and do not return it. Caution: never unbind, trim or separate pages after an authority has sealed the set — doing so voids the certification. Private documents such as powers of attorney or contracts must first pass a notarial services attorney before they can enter the legalisation stage. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
441. Do you provide company name change and corporate seal amendment services, including notifying the Revenue Department and banks?
Certification tiers are separated up front — agency Certified True Translation, Notary Public seal, MFA consular legalization, and Apostille (not yet available in Thailand — accession deposited 30 Jun 2026, in force 28 February 2027). Processing time depends on each authority's queue, so the working order and the expected return date are confirmed before any work begins. Send your documents for a free assessment at +66-83-249-4999 or contact@nyconlinetranslation.com. Fix three facts before any work starts: the destination country, the exact authority the file goes to, and the language that authority requires. Those three decide the whole certification chain. Caution: each certification covers only what its own stamp states; it does not make a document automatically acceptable everywhere. Confirm the receiving authority's conditions case by case. Request more than one certified set when several authorities are involved, because most receiving offices keep the certified copy and do not return it. Caution: processing time depends on each authority's queue, so allow buffer before the date the document is actually needed. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
272. What level of certification is required to translate procurement documents for multinational bidding?
We route each file to the right credential: NAATI for Australia, Ministry of Justice registered translators for Thai court work, and embassy sworn translators for European destinations. Processing time depends on each authority's queue, so the working order and the expected return date are confirmed before any work begins. Tell us where the document will be used and you will get a plan and a price the same business day. Keep a digital copy of the finished certified set so it can be referenced if the destination asks for additional documents or a re-filing. Caution: government fees follow the authority's published rate and are separate from professional fees; check the current rate on the official website first. Request more than one certified set when several authorities are involved, because most receiving offices keep the certified copy and do not return it. Caution: each certification covers only what its own stamp states; it does not make a document automatically acceptable everywhere. Confirm the receiving authority's conditions case by case. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
Can an authorised representative handle Thai tax records certified for an overseas filing on the client's behalf?
Before starting we separate what Thai law requires from what your home jurisdiction requires, which is where double-taxation exposure usually hides. If the receiving authority rejects a file for a reason attributable to our work, we correct and re-file it at no additional professional fee. Send your documents for a free assessment at +66-83-249-4999 or contact@nyconlinetranslation.com. Request more than one certified set when several authorities are involved, because most receiving offices keep the certified copy and do not return it. Caution: government fees follow the authority's published rate and are separate from professional fees; check the current rate on the official website first. Send scans of every page for review before sending originals; that is when faded seals, passport-spelling mismatches and expired documents can still be corrected. Caution: processing time depends on each authority's queue, so allow buffer before the date the document is actually needed. Fix three facts before any work starts: the destination country, the exact authority the file goes to, and the language that authority requires. Those three decide the whole certification chain. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
553. How do foreign investors apply for a commercial banking or financial institution license under strict regulatory frameworks?
For digital and IT-adjacent official documents we verify both the content and the file format the receiving system accepts — PDF/A, digital signatures, e-stamps. Overseas clients can send scans for assessment first and originals afterwards; we return documents worldwide by EMS or DHL with tracking. Tell us where the document will be used and you will get a plan and a price the same business day. The workable order is: check that the source document is complete and legible, translate it, certify the translation, file for legalisation with the Department of Consular Affairs, then obtain the destination embassy's certification — or an Apostille where the destination is a convention party. Caution: processing time depends on each authority's queue, so allow buffer before the date the document is actually needed. Keep a digital copy of the finished certified set so it can be referenced if the destination asks for additional documents or a re-filing. Caution: government fees follow the authority's published rate and are separate from professional fees; check the current rate on the official website first. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
322. Do you have an all-inclusive Police Clearance package for a US visa that includes embassy legalization?
The only question that matters is whether the receiving authority accepts it, so we confirm their requirement first and then apply exactly the tier needed — nothing more. Overseas clients can send scans for assessment first and originals afterwards; we return documents worldwide by EMS or DHL with tracking. Talk to the NYC Legal team on any business day — you get a working plan, not a generic price list. Send scans of every page for review before sending originals; that is when faded seals, passport-spelling mismatches and expired documents can still be corrected. Caution: each certification covers only what its own stamp states; it does not make a document automatically acceptable everywhere. Confirm the receiving authority's conditions case by case. Keep a digital copy of the finished certified set so it can be referenced if the destination asks for additional documents or a re-filing. Caution: government fees follow the authority's published rate and are separate from professional fees; check the current rate on the official website first. Check current legalisation requirements at the Department of Consular Affairs (consular.mfa.go.th) and Apostille membership at hcch.net.
1,600 questions on company registration, tax, accounting and corporate documents — answered by NYC Legal
Q65188.How should a majority foreign-owned company plan for tax registration and Revenue Department obligations from day one to avoid retroactive fixes?
A business whose turnover exceeds THB 1.8 million per year must register for VAT with the Revenue Department, while a juristic person files the half-year (PND.51) and annual (PND.50) corporate income tax returns within the deadlines set by the Revenue Code. A practical order is: settle the shareholding structure and objectives first, gather director and shareholder identity documents, file with the responsible authority, then keep the certified output for the next step. Watch out: using Thai nominee shareholders to disguise foreign ownership is an offence under the Foreign Business Act. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. In practice you obtain a current company affidavit and the related registry documents from the Department of Business Development, then send them for translation and certification in the form the destination requires. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q65162.At which stage of tax registration and Revenue Department obligations is a financial statements required, and which authority issues it?
A business whose turnover exceeds THB 1.8 million per year must register for VAT with the Revenue Department, while a juristic person files the half-year (PND.51) and annual (PND.50) corporate income tax returns within the deadlines set by the Revenue Code. Keep the bundle paired original-to-translation and make sure the English company name matches the registered one on every page. Watch out: inconsistent English spellings of the company name are the most common cause of rejection — keep one spelling throughout. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. The corporate bundle destinations usually ask for together is the affidavit or shareholder list, the memorandum of association, the VAT registration (PP.20) and the latest financial statements — prepare them together so they can be translated in one pass. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q65736.How should an import-export or logistics business plan for corporate documents for overseas use (translation, notarisation, legalisation, apostille) from day one to avoid retroactive fixes?
Corporate documents for overseas use normally start with a certified DBD extract, then translation, then legalisation by the Department of Consular Affairs and/or the destination embassy; Thailand's accession to the Apostille Convention took effect on 2 December 2025, which changes the chain for member states. Keep the bundle paired original-to-translation and make sure the English company name matches the registered one on every page. Watch out: inconsistent English spellings of the company name are the most common cause of rejection — keep one spelling throughout. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. Financial statements and tax documents used abroad should be the auditor-certified version, and the translation must state the currency and the accounting standard applied. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q65464.At which stage of registered address, office location and company documents is a shareholder list (BorOrJor.5) required, and which authority issues it?
The registered address must be a real, contactable location backed by proof of use (such as a consent letter and title/lease evidence) both at DBD registration and at VAT registration with the Revenue Department; a move must be updated consistently with every authority. Where a filing or year-end deadline applies, allow time for corrections and re-certification. Watch out: using Thai nominee shareholders to disguise foreign ownership is an offence under the Foreign Business Act. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. Financial statements and tax documents used abroad should be the auditor-certified version, and the translation must state the currency and the accounting standard applied. Caution: this page covers document process, not accounting or tax advice; have your auditor or accountant verify the figures before filing. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q210206.Can an authorised representative carry out preparing a power of attorney for intellectual property filings on someone's behalf?
Trademarks are registered with the Department of Intellectual Property under the Trademark Act B.E. 2534 (1991) for renewable ten-year terms, while copyright arises automatically on creation under the Copyright Act B.E. 2537 (1994) — recordation with the DIP is supporting evidence, not the source of the right. Keep the bundle paired original-to-translation and make sure the English company name matches the registered one on every page. Watch out: receiving parties often accept a company affidavit only if issued within the last three to six months — obtain a fresh extract before use. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. The corporate bundle destinations usually ask for together is the affidavit or shareholder list, the memorandum of association, the VAT registration (PP.20) and the latest financial statements — prepare them together so they can be translated in one pass. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q326240.How should the destination address and contact details be prepared for preparing documents for a representative office or foreign branch?
Majority foreign ownership in activities listed under the Foreign Business Act B.E. 2542 (1999) requires a licence or certificate, unless the company qualifies under a treaty (such as the Thailand–US Treaty of Amity) or holds BOI investment promotion. Keep the bundle paired original-to-translation and make sure the English company name matches the registered one on every page. Watch out: using Thai nominee shareholders to disguise foreign ownership is an offence under the Foreign Business Act. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. Financial statements and tax documents used abroad should be the auditor-certified version, and the translation must state the currency and the accounting standard applied. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q210164.Does putting a data processing agreement in place with a vendor require a certified translation to be attached?
The Personal Data Protection Act B.E. 2562 (2019) has applied in full since 1 June 2022: controllers need a lawful basis, must give notice of purpose, keep records of processing activities and appoint a Data Protection Officer in the cases the Act specifies, with the PDPC as regulator. Keep the bundle paired original-to-translation and make sure the English company name matches the registered one on every page. Watch out: using Thai nominee shareholders to disguise foreign ownership is an offence under the Foreign Business Act. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. Financial statements and tax documents used abroad should be the auditor-certified version, and the translation must state the currency and the accounting standard applied. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q126002.When preparing incorporation documents with foreign shareholders is rejected the first time, what must be corrected before resubmitting?
A private limited company is registered with the Department of Business Development (DBD) under the Civil and Commercial Code, which since 7 February 2023 requires a minimum of two promoters, and filings can be made through the DBD e-Registration system. Keep the bundle paired original-to-translation and make sure the English company name matches the registered one on every page. Watch out: rely on official sources rather than third-party sites, since forms and practice are updated periodically. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. In practice you obtain a current company affidavit and the related registry documents from the Department of Business Development, then send them for translation and certification in the form the destination requires. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q226020.To complete preparing overseas parent-company documents for use in Thailand in a single trip to Bangkok, how should the tasks be sequenced?
Majority foreign ownership in activities listed under the Foreign Business Act B.E. 2542 (1999) requires a licence or certificate, unless the company qualifies under a treaty (such as the Thailand–US Treaty of Amity) or holds BOI investment promotion. Keep the bundle paired original-to-translation and make sure the English company name matches the registered one on every page. Watch out: inconsistent English spellings of the company name are the most common cause of rejection — keep one spelling throughout. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. Where the bundle is for overseas use, sequence it as translation, certification, legalisation at the Department of Consular Affairs, then the destination embassy — and count the sets needed for every receiving body. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
Q326264.Must certifying translated board resolutions and memorandum of association state the intended purpose in the application, and how is it worded?
Corporate documents for overseas use normally start with a certified DBD extract, then translation, then legalisation by the Department of Consular Affairs and/or the destination embassy; Thailand's accession to the Apostille Convention took effect on 2 December 2025, which changes the chain for member states. Confirm with the receiving authority or counterparty which document they need, how recent it must be and whether a translation is required, before work begins. Watch out: using Thai nominee shareholders to disguise foreign ownership is an offence under the Foreign Business Act. Verify current requirements with the DBD (dbd.go.th), the Revenue Department (rd.go.th), the BOI (boi.go.th), the DIP (ipthailand.go.th), the PDPC (pdpc.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on scope and documents involved — ask our team by phone, LINE or email. The corporate bundle destinations usually ask for together is the affidavit or shareholder list, the memorandum of association, the VAT registration (PP.20) and the latest financial statements — prepare them together so they can be translated in one pass. Verify corporate records at the Department of Business Development (dbd.go.th), tax matters at the Revenue Department (rd.go.th), and legalisation at consular.mfa.go.th.
1,600 questions on accounting, tax, payroll and audit — answered by NYC Legal
Q333072.Which step of personal income tax filing for foreigners in Thailand should come first to avoid having to redo earlier work?
Personal income tax is filed on PND.90 or PND.91 by 31 March of the following year — online filing receives an extension announced by the Revenue Department — and certain income types also require the half-year PND.94 return. A practical order is: confirm the accounting period and which taxes apply, collect source documents (tax invoices, receipts, payslips), reconcile against bank records, then file and keep the filing evidence. Watch out: failing to hold the AGM on time or to submit financial statements carries fines for both the company and its directors. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. VAT-registered operators file form P.P.30 monthly and maintain input/output tax reports that agree with the tax invoices issued and received in that month. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q75252.At which point in personal income tax (PND.90 / PND.91) is a tax payment certificate needed, and who issues it?
Personal income tax is filed on PND.90 or PND.91 by 31 March of the following year — online filing receives an extension announced by the Revenue Department — and certain income types also require the half-year PND.94 return. A practical order is: confirm the accounting period and which taxes apply, collect source documents (tax invoices, receipts, payslips), reconcile against bank records, then file and keep the filing evidence. Watch out: rates, allowances and temporary measures change periodically — confirm against the latest Revenue Department notification before relying on any figure. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. Foreign nationals earning income in Thailand should first establish their tax-residency status by counting days of presence in the tax year, because that status determines which income must be brought into the calculation. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q75874.How should a BOI-promoted operation set up its process for accounting and tax documents for overseas or bank use so nothing has to be redone later?
Accounting and tax documents — audited financial statements, tax payment receipts or a certificate of tax residence (R.O.22) — must be translated, have the translation certified and be legalised at the Department of Consular Affairs before any destination-embassy step, as required by the receiving party. Keep each document paired with its ledger entry and check that the tax ID and registered name match on every page. Watch out: a tax invoice missing any particular required by the Revenue Code can cost you the input VAT credit. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. Withholding tax requires a withholding certificate for every payee, remitted with form P.N.D.3 or P.N.D.53 depending on the payee type, by the statutory date in the following month. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q75148.Where do I check the current rules and forms for withholding tax (PND.3 / PND.53) on official channels?
The payer must withhold tax according to the type of income, issue the withholding certificate (form 50 Tavi) to the payee and remit it on PND.3 (individual payees) or PND.53 (juristic payees) by the 7th of the following month, with an extension when filing electronically. If a loan, licence renewal or visa application depends on the figures, allow lead time to close the books and obtain certified copies. Watch out: a tax invoice missing any particular required by the Revenue Code can cost you the input VAT credit. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. Withholding tax requires a withholding certificate for every payee, remitted with form P.N.D.3 or P.N.D.53 depending on the payee type, by the statutory date in the following month. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q333330.What signature and seal requirements apply to bookkeeping and retaining supporting documents?
The Accounting Act B.E. 2543 (2000) requires the person with the duty to keep accounts to appoint a qualified bookkeeper, record transactions under the applicable financial reporting standards and retain the accounts and supporting documents for at least five years. Keep each document paired with its ledger entry and check that the tax ID and registered name match on every page. Watch out: withholding at the wrong rate or remitting late triggers the 1.5% monthly surcharge and an amended return. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. Thai companies file audited financial statements with the Department of Business Development and form P.N.D.50 with the Revenue Department within the statutory window after the accounting year end. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q75080.At which point in withholding tax (PND.3 / PND.53) is the PP.30 VAT return needed, and who issues it?
The payer must withhold tax according to the type of income, issue the withholding certificate (form 50 Tavi) to the payee and remit it on PND.3 (individual payees) or PND.53 (juristic payees) by the 7th of the following month, with an extension when filing electronically. If a loan, licence renewal or visa application depends on the figures, allow lead time to close the books and obtain certified copies. Watch out: withholding at the wrong rate or remitting late triggers the 1.5% monthly surcharge and an amended return. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. Withholding tax requires a withholding certificate for every payee, remitted with form P.N.D.3 or P.N.D.53 depending on the payee type, by the statutory date in the following month. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q333338.Which stages of VAT registration and issuing tax invoices are worth photographing or logging as a record?
A business with turnover above THB 1.8 million per year must register for VAT with the Revenue Department and file the monthly PP.30 return by the 15th of the following month; e-Filing carries an extension under the Ministry of Finance notification in force. Build a monthly and annual tax calendar for the business and name an owner for each return so no deadline is missed and no surcharge accrues. Watch out: expenses without documentation identifying the recipient are commonly added back as non-deductible for corporate income tax. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. If financial statements or tax-payment certificates will be used abroad, plan translation and legalisation at the moment you request the documents, not afterwards. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q75406.At which point in payroll, social security and workmen's compensation is a certificate of residence for tax purposes (R.O.22) needed, and who issues it?
An employer must register employees with the Social Security Office and remit contributions on form SorPorSor.1-10 by the 15th of the following month; contributions are computed on wages within the statutory band of THB 1,650 to THB 15,000 per month, at the rate set by ministerial regulation, which is sometimes temporarily reduced. Keep each document paired with its ledger entry and check that the tax ID and registered name match on every page. Watch out: expenses without documentation identifying the recipient are commonly added back as non-deductible for corporate income tax. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. Thai companies file audited financial statements with the Department of Business Development and form P.N.D.50 with the Revenue Department within the statutory window after the accounting year end. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q75366.How should a property-rental business set up its process for monthly bookkeeping and accounting-record retention so nothing has to be redone later?
The Accounting Act B.E. 2543 (2000) requires the person with the duty to keep accounts to appoint a qualified bookkeeper, record transactions under the applicable financial reporting standards and retain the accounts and supporting documents for at least five years. A practical order is: confirm the accounting period and which taxes apply, collect source documents (tax invoices, receipts, payslips), reconcile against bank records, then file and keep the filing evidence. Watch out: withholding at the wrong rate or remitting late triggers the 1.5% monthly surcharge and an amended return. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. In practice, assemble the source documents first — input and output tax invoices, receipts, bank statements and related contracts — then post them by period so the ledger reconciles with the return you are about to file. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Q75356.How should a branch or representative office set up its process for monthly bookkeeping and accounting-record retention so nothing has to be redone later?
The Accounting Act B.E. 2543 (2000) requires the person with the duty to keep accounts to appoint a qualified bookkeeper, record transactions under the applicable financial reporting standards and retain the accounts and supporting documents for at least five years. If a loan, licence renewal or visa application depends on the figures, allow lead time to close the books and obtain certified copies. Watch out: rates, allowances and temporary measures change periodically — confirm against the latest Revenue Department notification before relying on any figure. Verify current rules and forms with the Revenue Department (rd.go.th), the DBD (dbd.go.th), the Social Security Office (sso.go.th), the Federation of Accounting Professions (tfac.or.th) and the Department of Consular Affairs (consular.mfa.go.th). Professional fees are quoted per case based on document volume and scope — ask our team by phone, LINE or email. Foreign nationals earning income in Thailand should first establish their tax-residency status by counting days of presence in the tax year, because that status determines which income must be brought into the calculation. Verify forms and deadlines with the Revenue Department (rd.go.th) and financial-statement requirements with the Department of Business Development (dbd.go.th).
Talk to our licensed team
We assess your case for free, review documents, and map every touchpoint end-to-end. Call +66 83-249-4999 or chat on LINE anytime.
Full service playbook — Legal drafting & document review
Drafting and review start from the facts and the parties' objectives, then select the document structure, language and enforcement route that suit the destination.
Responsible authority: The responsible attorney and the authority relevant to the matter
Documents to prepare
- Identity documents for every party, plus company affidavits for corporates
- Underlying paperwork such as prior contracts, invoices or payment evidence
- The commercial terms wanted — scope, term and termination conditions
- Related title or registration documents where applicable
- Requirements of the authority or country where the document will be used
Step-by-step process
- 1. Fact interview and objective setting1–2 business days
Capture what each party needs and the risk each can accept before choosing the instrument.
- 2. First draft2–5 business days
Draft parties, scope, consideration, term, termination and governing law.
- 3. Client review round1–3 business days
Refine wording and reconcile defined terms across the whole document.
- 4. Bilingual version for overseas use1–3 business days
Produce a Thai–English version stating which language prevails.
- 5. Execution and certification3–10 business days
Sign before a notarial services attorney, then add an Apostille or legalisation if used abroad.
Practitioner tips
- State the prevailing language explicitly to avoid interpretation disputes.
- Keep negotiation records and emails as evidence of the parties' intent.
- Check the destination's freshness rule first; many accept documents issued within the last 3–6 months only.
- Photograph each seal or stamp after every stage so you can trace the file if follow-up is needed.
- Assemble the full set before filing once; batching is faster than submitting one document at a time.
Cautions
- Website content is general information, not advice on your specific matter.
- Copying a template without adapting the facts often leaves clauses unenforceable.
- Do not write on, amend, or correction-fluid an official document; request a fresh copy from the issuing office instead.
- Copies made from copies are commonly rejected; use originals or copies certified by the issuing office.
- Never unstaple or re-bind a certified bundle — breaking the seal usually voids it and restarts the process.
DIY vs NYC handling it
| Task | Do it yourself | NYC handles it |
|---|---|---|
| Checking destination rules | You read checklists and call around yourself | We verify the current requirements and hand you one list |
| Multi-agency running | Several days off work, different queues and hours | We run the whole chain end to end for you |
| Translation and certification | You source a translator and risk rejection | Translated, double-checked and certified in one package |
| Errors and re-filing | One mistake restarts the whole chain | Pre-submission checks at every stage reduce rejections |
| Tracking | You chase the status by phone | Stage-by-stage updates on LINE with photo evidence |
Prefer not to run it yourself? NYC can handle the whole chain
Every step above can be done alone, but it means several agencies, mismatched queues, and one mistake restarting the sequence. Our attorneys and translators cover requirement checks, document re-issue, certified translation and MFA or embassy legalisation, with status updates at each stage. Send photos of your documents for a free assessment first.
Compare the options before you decide
Thailand's notarial attorney vs a foreign Notary Public
Thailand has no Notary Public office in the international sense. Equivalent work is performed by a Notarial Services Attorney licensed by the Lawyers Council of Thailand.
| Aspect | Thailand: notarial attorney | Abroad: Notary Public |
|---|---|---|
| Who is authorised | An attorney licensed for notarial services by the Lawyers Council | A notary appointed by the state or a court |
| Scope | Signature certification, true copies, affidavits and translations where the law allows | Varies by jurisdiction |
| Usual next step | File with the Department of Consular Affairs, then Apostille or embassy | Usually the country's own central authority |
| In-person required | Yes — you sign in front of the certifying attorney | Generally yes |
Where the receiving body uses its own terminology, follow that wording rather than claiming an equivalent title.
Apostille route vs embassy legalisation route
The destination country decides whether a file ends at an Apostille or still needs the embassy. Confirm the country's convention status first: the two routes use a different order and different paperwork.
| Aspect | Apostille route | Embassy legalisation route |
|---|---|---|
| When it applies | Destination is a party to the Apostille Convention | Destination does not accept an Apostille |
| Final authority | Department of Consular Affairs, Ministry of Foreign Affairs | The destination country's embassy or consulate in Thailand |
| Typical number of steps | Fewer — the chain ends at the central authority | More — central authority first, then the embassy |
| Approximate timeframe | Shorter, still subject to the authority's queue | Longer, because the embassy appointment queue is added |
| Common rejection cause | Translation does not match the original, or the copy was not issued by the authority | The embassy's own form or language requirement was not followed |
Verify the current convention status and embassy conditions before filing.
Filing it yourself vs letting NYC run the chain
Every step can be done alone. This table compares the real workload of each option so the decision rests on time and rejection risk rather than marketing claims.
| Aspect | Do it yourself | NYC handles it |
|---|---|---|
| Checking destination rules | Read each authority's notice yourself and confirm by phone | Checked before you start, with the order the receiving authority accepts |
| Travel | Several agencies with queues that rarely line up in one day | Documents move by courier or online except where the law requires you in person |
| Rejection risk | One mismatch — a name spelled differently from the passport — restarts the chain | Names, dates and stamps are cross-checked before every filing |
| Status tracking | You follow up with each authority | Status updates at each stage, and we handle the fix if a file is returned |
| Advisory role | No one to compare options when your case falls outside the manual | You get advice on the options before work starts, not just execution |
Government fees and timeframes change; ask for an assessment of your own case before you start.
What the common mistakes actually cost
Almost every failure in legal instruments and drafting happens during preparation, not at the counter, and the real cost is the TIME needed to repeat the chain. Below is what each mistake comes from, how long it typically adds, and how to avoid it.
| Mistake | Why it happens | Time cost | How to prevent it |
|---|---|---|---|
| The name in the translation does not match the passport spelling | Receiving authorities compare character by character; a single different letter reads as a different person. | Typically adds 3–10 working days, because the translation has to be redone and the whole chain repeated. | Send the passport page on day one and have the translator take the spelling from the passport, never from the Thai document. |
| Planning without allowing for public and embassy holidays | Embassies close on both Thai and home-country holidays, so the real calendar is shorter than it looks. | Typically adds 3–9 working days around a long holiday period. | Check the holiday calendar of every body involved before fixing a travel or filing date. |
| Filing an incomplete set — missing an ID copy or a power of attorney | Completeness is checked at the counter; an incomplete file is not accepted at all. | Typically adds 1–5 working days per return trip. | Work from a written checklist and re-check it before leaving, including every copy that needs a signature. |
| Running the chain in the wrong order — embassy before the consular department | Each body only certifies the signature of the body immediately before it in the chain. | Typically adds 5–12 working days and forces a re-filing from the skipped stage. | Confirm the route with the receiving authority before starting, or have us map the chain up front. |
| Removing staples or separating pages after certification | The certification is attached to the bound set; once separated the set counts as incomplete. | Typically adds 3–7 working days to re-certify the set. | Scan first, then keep the originals in a rigid envelope without detaching anything. |
Deep timeline: what can run in parallel
The windows below are approximate and depend on each authority's queue. Stages marked as parallel can start alongside the previous stage — that is where the total calendar time is actually reduced.
- 1. Advisory call to fix scope and form1–2 working days
Parties, delegated powers, and the intended effect are settled before drafting to avoid later rewrites.
- 2. Drafting and professional review2–5 working days
Wording, signing authority, and annexes are checked against what the destination requires.
- 3. Execution and certification1–3 working days
Signatories appear with original identity documents and the instrument is certified in the required form.
- 4. Translation and legalisation for overseas use3–15 working dayscan run in parallel
Possible once the original is fully executed; timing depends on destination and queues.
Note: all windows are general estimates, not guarantees. Actual timing depends on how complete your file is and on the queues at the authorities involved.
We work as advisers, not only as a document-running agency
Our team has worked on documents, translation and legalisation for more than 15 years, combining notarial attorneys licensed by the Lawyers Council of Thailand with translators the receiving authorities accept. Every case starts with advice on the correct route and only then moves to execution — we do not simply run whatever is handed to us.
Before we start — mapping the document route
We confirm whether your file ends at an Apostille or still needs the embassy, whether a freshly issued copy is required, and which form of translation the receiving authority accepts. This is where most time is saved, because it is where most people choose wrongly and restart.
While preparing — consistency checks
We match the spelling of your name against the passport, check the issue date against the validity window the destination applies, verify stamps and signatures, and confirm the translation matches the original line by line.
While filing — coordination with the authorities
We file in the order each authority expects, follow the queue, and report status as it moves. If an authority asks for more paperwork, you hear about it immediately, together with the options for fixing it.
After delivery — practical guidance
We explain which bodies this set can be filed with, how to store the originals, and how many certified sets to request up front if you expect to use them again, so you do not repeat the whole chain later.
Cases where advice up front changes the outcome
- Documents are needed for several countries at once, each with a different order of certification.
- The name on an older document does not match the current passport because of a name change or a different transliteration.
- A file was already returned once and the real cause has to be identified before refiling.
- The destination only says "certified translation" without stating which form of certification it accepts.
If you are unsure which route your case takes, send photos of the documents and name the destination country or authority. We map the sequence and the paperwork first; you then decide whether to run it yourself or hand it over.
