Situation guide
Double Taxation Agreement (DTA) Thailand: 61 Treaty Countries, Withholding Tax Rates & Foreign Tax Credits
Foreign investors, multinational groups, cross-border service providers and overseas holding companies.
Quick answer
Thailand's Double Tax Agreements (the Revenue Department lists about 61 treaty partners) allocate taxing rights on cross-border income. A resident of a treaty country may receive reduced Thai withholding on dividends, interest and royalties when the payer holds a Certificate of Tax Residence and beneficial-ownership evidence and files P.N.D.54 correctly. DTAs do not cover VAT, so reverse-charge P.P.36 is assessed separately for imported services.
The PDF button opens a print-ready sheet — choose “Save as PDF” in the browser dialog. It contains the key facts, the document checklist and the timeline.
Detailed guidance
1. Classify the payment under the treaty before paying
Treaty relief starts with characterising the payment: dividends (Article 10), interest (Article 11), royalties (Article 12) or business profits (Article 7). Each article carries its own ceiling and conditions, and some treaties define royalties more broadly or narrowly than Revenue Code section 40(3). Open the specific treaty text from the Revenue Department list, including amending protocols and any MLI modifications, before choosing a rate. A secondary summary table should not be the only basis.
Contracts and invoices should describe the work consistently with that classification. Engineering services rendered without a Thai permanent establishment are often business profits that Thailand cannot tax under the treaty, whereas payments for software licences, technical know-how or equipment use may be royalties taxable at the treaty ceiling. A frequent error is relying on the contract label rather than the substance; an audit looks at what was actually supplied.
2. Residence and beneficial-ownership evidence
Treaty benefits belong to residents of the partner state. The Thai payer should obtain a Certificate of Tax Residence issued by the recipient's tax authority for the payment year, with a certified translation where it is not in English or Thai. For dividends, interest and royalties most treaties grant the reduced rate only to the beneficial owner; a conduit obliged to pass funds onward may not qualify, and the MLI adds a principal purpose test to covered treaties.
Keep a file for each payee: residence certificate, beneficial-ownership confirmation, contract, invoice and rate calculation. If the certificate arrives after payment, withhold at the domestic rate and consider a refund claim through Revenue Department procedures. Applying a treaty rate without evidence leaves the Thai payer exposed to the under-withheld tax, surcharge and penalty, because the withholding and remittance duty sits with the payer.
3. P.N.D.54 and P.P.36 are separate obligations
P.N.D.54 remits income tax withheld under section 70 from payments to a foreign company not carrying on business in Thailand, due seven days after the month of payment and extended for e-filing under the prevailing notification. P.P.36 is separate: the Thai recipient self-assesses 7% VAT on services supplied from abroad and used in Thailand (section 83/6). Treaties do not reduce or exempt that VAT, though a VAT-registered payer may usually claim it as input tax under the normal conditions.
Thailand's VAT on e-services supplied by foreign platforms to non-registered consumers is registered and paid by the foreign supplier (P.P.30.2), not through P.P.36. A VAT-registered business buying digital services from a supplier that has not charged Thai VAT still assesses P.P.36. A monthly reconciliation should list every foreign payment and mark whether P.N.D.54, P.P.36, both or neither applies.
4. Foreign tax credits for Thai residents
In the opposite direction, a Thai-resident company or individual receiving foreign income already taxed abroad can usually claim a treaty credit capped at the Thai tax attributable to that income. Evidence of the foreign tax paid, such as a withholding certificate or authority confirmation, is needed, with income tracked by source. For individuals the credit matters where that income is also taxable in Thailand under Order Paw.161/2566.
The year-end file should link each foreign income item, tax paid, exchange rate used and treaty article relied on so the claim can be traced. A team with an extensive track record in cross-border accounting can assemble that file; contact staff for a quotation listing income types and treaty partners involved. This guide is source-based editorial guidance, not an individual entitlement determination.
Key facts
| Treaty network | About 61 partners on the Revenue Department list; check each treaty's in-force status |
|---|---|
| Domestic statutory WHT | Dividends 10%; interest and royalties 15% for a foreign company not carrying on business in Thailand (section 70) |
| P.N.D.54 deadline | Within 7 days after the month of payment; e-filing extensions generally allow about 15 days |
| Taxes covered | Income taxes only; VAT and stamp duty are outside the treaties |
Practical summary
If you only read one block, start with these five lines and return to the detail afterwards.
- 1.Before payment — Review the treaty article and residence evidence.
- 2.On payment — Withhold at the evidenced treaty rate.
- 3.By the following month's deadline — File and pay P.N.D.54 and P.P.36 on time.
- 4.Certificate of Tax Residence from the home tax authority
- 5.Proof of beneficial ownership
Document checklist
Certificate of Tax Residence from the home tax authority
Establishes treaty entitlement for the payment year.
Proof of beneficial ownership
Reduced dividend, interest and royalty rates usually depend on it.
Certified English translation
Needed when originals are not in Thai or English.
Invoice and contract defining the payment
Supports Article 7, 11 or 12 classification.
Forms P.N.D.54 and P.P.36
Two separate duties: income tax withholding and reverse-charge VAT.
Timeline
Before payment
Review the treaty article and residence evidence.
On payment
Withhold at the evidenced treaty rate.
By the following month's deadline
File and pay P.N.D.54 and P.P.36 on time.
Year end
Assemble foreign tax credit documentation and reconcile.
Common mistakes
- Applying treaty rates automatically without a Certificate of Tax Residence.
- Confusing royalties (Article 12) with business profits (Article 7) when withholding under section 70.
- Omitting reverse-charge P.P.36 on overseas digital or engineering services.
Repeat questions
No. Treaties cover income taxes, not VAT. Foreign digital suppliers selling to consumers register for Thai e-Service VAT themselves, while a VAT-registered business buying services without Thai VAT charged files P.P.36.
A Thai resident applies to the Revenue Department, generally using form RT-1 for individuals or RT-2 for companies, with tax-filing evidence and the documents requested. State the treaty partner and tax year required, and check the current form before applying.
Verifiable sources
These original sources address the issues described under each reference; they do not certify every statement or a service outcome. Check amendments and the conditions applicable to the entity's actual circumstances.
1. Guidance
Revenue Department: Double Tax Agreements list and statusThe Revenue Department
Table of countries, entry-into-force dates, treaty texts and MLI modifications; open the specific treaty text before applying a rate.
2. Guidance
Revenue Department: Introduction to DTAsThe Revenue Department
Persons covered, taxes covered (VAT excluded), ceiling rates for dividends, interest and royalties, and business profits without a permanent establishment.
3. Code
Revenue Code section 70: withholding on income paid to a foreign juristic person not carrying on business in ThailandThe Revenue Department
Scope of section 40(2)-(6) income paid from or in Thailand, withholding at the juristic-person rate and remittance within seven days of month-end, with the interest carve-out for state development lenders.
4. Official system or form
Revenue Department: form P.P.36 VAT remittance returnThe Revenue Department
The Revenue Department's VAT forms page, including P.P.36 for payers of services provided from abroad and used in Thailand.
5. Code
Revenue Code section 83/6: payer remits VAT for services from abroadThe Revenue Department
Section 83/6(2) has the payer remit VAT where a service provided from abroad is used in the Kingdom, within the categories the provision lists.
6. Guidance
RD foreign tax credit manual (November 2025)The Revenue Department
Country/category ceilings, partial remittances, baht conversion and evidence of foreign tax paid.
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