Which tax documents must a person with foreign income, accounts, or entities prepare?

A core set: (1) Thai TRC from the Revenue Department (RD-TRC) for treaty-rate WHT; (2) W-8BEN (individual) / W-8BEN-E (entity) for US withholding agents; (3) FATCA & CRS self-certification at every bank; (4) UBO declaration per AMLO Thailand + UK PSC / EU UBO / FinCEN BOI; (5) DTA treaty benefit claim (Form 8833 US, DT-Individual UK). NYC Legal completes the full set in 7-21 working days.

Tax Residency · FATCA · CRS · UBO · DTA · TRC

Thai TRC · W-8BEN/W-9 · FATCA & CRS self-cert · UBO disclosure (AMLO / UK PSC / EU UBO / FinCEN BOI) · DTA treaty relief · exit-tax planning — across 14 treaty jurisdictions.

Documents & forms

Form W-8BEN (Individual)

Self-signed (filed with withholding agent)

Beneficial owner certificate for non-US individuals claiming treaty-rate withholding under the US-Thai tax treaty.

1-3 days · 1,500-3,500 บาท (รวมที่ปรึกษา)

Form W-8BEN-E (Entity)

Entity + Authorised Signatory

Entity-level beneficial owner certificate including FATCA chapter 4 classification (Active/Passive NFFE / FFI).

3-7 days · 5,500-12,000 บาท

Form W-9 (US Person)

US Person / Green Card holder

TIN certification for US persons (citizens, residents, green-card holders) banking or earning in Thailand.

1-2 days · 1,500-3,000 บาท

FATCA Self-Certification

Account Holder

Account-holder declaration under Model 1A IGA (issued July 2016) used by Thai financial institutions.

1-3 days · ฟรี (รับรอง) — 2,500 บาทหากต้องที่ปรึกษา

CRS Self-Certification

Account Holder

OECD CRS tax-residency declaration — Thailand joined the MCAA in 2019, first exchange in 2023.

1-3 days · ฟรี — 2,500 บาทหากต้องที่ปรึกษา

Tax Residency Certificate (TRC)

Revenue Department (RD-TRC)

Thai tax-residency certificate (≥180 days in calendar year) for treaty-relief claims in 61 partner jurisdictions.

10-20 days · 1,500-2,500 บาท + ค่าธรรมเนียมกรม

Withholding Tax Reduction Application (RD Form 17)

Revenue Department

DTA withholding-rate reduction application — dividends, interest, royalties, technical fees.

21-45 days · 4,500-9,500 บาท

Beneficial Ownership (UBO) Declaration

Director + Shareholder

UBO disclosure (≥25% threshold) — mandatory under Thai AMLO Reg. 2019 and destination regimes (UK PSC, EU 5AMLD/6AMLD, US Corporate Transparency Act).

3-10 days · 6,500-15,000 บาท

UBO Register Filing (UK/EU)

Companies House / EU Commercial Register

PSC (UK) or UBO Register (EU member states) filing for Thai-owned entities.

7-21 days · 8,000-25,000 บาท + ค่าธรรมเนียมต่างประเทศ

FinCEN BOI Report (US CTA 2024)

FinCEN (online portal)

UBO report under the US Corporate Transparency Act 2024 — mandatory for US-formed entities (incl. Thai-owned).

5-14 days · 12,000-28,000 บาท

Domicile Election / Statutory Residence Test

Tax adviser + lawyer

Domicile/residence analysis (UK SRT, IRC §7701(b), AU 183-day test) for inheritance and worldwide-income planning.