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Apply for a Thai Tax Residence Certificate
Thai tax residents can request a Tax Residence Certificate (Por.Ngor.Dor.30 / 31) from the Revenue Department to claim DTA benefits in another treaty country.
Last reviewed: 2026-06-15 · by Anglo Siam Law Editorial Team · How we research this topic
TL;DR
Tax Residence Certificate from Revenue Department to claim DTA benefits abroad. Submit Por.Ngor.Dor.30 / 31 application with passport + visa + filed tax returns + Thai address evidence. Processing 2-4 weeks.
Overview
Thai tax residents can request a Tax Residence Certificate (Por.Ngor.Dor.30 / 31) from the Revenue Department to claim DTA benefits in another treaty country. This guide explains what to expect, your rights, and the steps you should take to protect yourself in this situation.
Immediate Steps to Take
Confirm tax-resident status (180+ days in calendar year).
Confirm tax returns are filed up to date.
Identify the foreign country and treaty article needing the certificate.
Complete Form Por.Ngor.Dor.30 (individual) or 31 (corporate) at the Revenue Department.
Submit at the Area Revenue Office with supporting documents.
Receive Tax Residence Certificate (typically 2-4 weeks).
Apostille / MFA legalise if foreign country requires.
Legal Considerations
Important legal points to understand about this situation:
DTA benefit claims commonly require the certificate dated for the relevant tax year.
Revenue Code §41 ¶3 residency test (180-day rule).
Por.161/2566 affects post-2024 foreign-source-income treatment.
Key Statutes
| Statute | Reference | Note |
|---|---|---|
| Revenue Codeประมวลรัษฎากร | §41 |
Common Mistakes to Avoid
- Requesting certificate for a year where 180-day threshold was not met.
- Missing pre-filed tax returns — Revenue Department refuses.
- Forgetting legalisation step where destination requires.
Embassy Assistance
What Your Embassy Can Do
No role — Revenue Department process. Embassy may assist with legalisation in receiving country.
Frequently Asked Questions
Can I get one before filing taxes?
Need filed returns for the year in question.
Free?
Yes — Revenue Department issues without fee.
Expected Timeline
2-4 weeks at Revenue Department.
Related Topics
Get Professional Help
When Legal Representation Matters
If you are experiencing apply for a thai tax residence certificate, immediate professional legal assistance is essential to protect your rights and navigate this situation effectively.
Anglo Siam Legal provides experienced legal services across Thailand for both Thai nationals and foreigners.
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