Tax treaties of Thailand: avoid double tax on remitted income in 2026

Last reviewed: November 2026 · Reviewed by Stéphane Gombauld, tax expert, technologist and digital nomad

You live in Thailand, or plan to, and your income comes from several countries. You want to know when a treaty stops you being taxed twice, how the 2024 remittance rule interacts with treaties, and how to prove you are a Thai resident. This page gives you the 2026 rules and links to every other Thailand guide.

Thailand tax treaties in 2026: the key figures

Is this guide for you?

Read on if you…

• live in Thailand 180 days or more and earn salary, fees, dividends or pensions from abroad;
• run a Thai or foreign company that pays or receives cross-border dividends, interest or royalties;
• split the year between Thailand and another country and need the tie-breaker rules.

Probably not your case if you…

• only earn Thai income and never work abroad (no treaty question arises);
• stay under 180 days a year and keep all income outside Thailand (you are non-resident with no Thai exposure).

How do Thailand's tax treaties work?

A double tax agreement is a contract between two countries that decides which one may tax each type of income, and how much. Thai treaties follow the OECD Model with UN Model features, such as wider rights for the country where services are performed. They are published in the Royal Gazette and override the Revenue Code where they conflict.

Treaties matter more in Thailand since 2024. Under Revenue Department Orders Paw. 161/2566 and 162/2566, a resident's foreign income earned from 1 January 2024 is taxable in the year it is brought into Thailand. Many nomads now face tax in two places on the same euro or dollar. The full remittance logic is in personal income taxes in Thailand.

Here's how a treaty fixes that. For each income type it gives taxing rights to the residence country, the source country, or both. Where both may tax, the residence country gives a foreign tax credit: the tax paid abroad is deducted from the tax due at home, up to the home tax on that income. Paw. 162/2566 confirms that this credit applies to remitted income from treaty countries.

Without a treaty, there is no Thai credit for individuals. You simply pay both.

Which Thai treaties matter most for location-independent professionals?

Two practical points. First, Thailand's domestic dividend withholding is already 10%, and most treaty caps are 10% or higher, so dividends rarely benefit. Second, where a treaty cap is above the domestic rate, the lower domestic rate applies. Treaties never increase tax.

For the Hong Kong side of that treaty, see tax treaties of Hong Kong. Regional comparisons are in the tax landscape overview of Singapore and the tax landscape overview of Malaysia.

How do treaties affect your salary, pension and business?

Employment. Under the typical employment article, salary is taxable where the work is physically done. If you live in Thailand and work from Bangkok for a foreign employer, Thailand taxes those days. Your employer's country can tax only days you actually work there. For short trips abroad, the 183-day rule applies: salary stays taxable only in Thailand if you spend 183 days or less in the other country, your employer is not resident there, and no branch there bears the cost.

Pensions. Most Thai treaties give private pensions to the country of residence and government pensions to the paying state. Here's the catch: a private pension that a treaty assigns to Thailand becomes taxable here once remitted.

Teachers and researchers. Many Thai treaties exempt visiting teachers and researchers for two years. Useful if you take a university contract.

Your business. A foreign company's profits are taxable in Thailand only if it has a permanent establishment (PE) here: a fixed place of business, or an agent who habitually signs contracts. Many Thai treaties also create a service PE when staff provide services in Thailand for more than 90 to 183 days in a 12-month period. A founder running a foreign company from a Chiang Mai condo can trigger one. See corporate income tax in Thailand and legal forms of business in Thailand.

Information exchange. Thailand exchanges financial account data under the Common Reporting Standard since 2023. Treaties are a rulebook, not a hiding place.

How do you prove Thai residence and claim treaty benefits?

When both countries claim you

You can be resident in Thailand (180 days) and in your old country at the same time. Your centre of vital interests – basically where your life is: home, partner, kids, main business – often decides. The treaty tie-breaker runs in order:

1. Permanent home available to you.
2. Centre of vital interests.
3. Habitual abode, meaning where you usually live day to day.
4. Nationality.
5. Mutual agreement between the two tax authorities.

Keep a flat in your home country and Thailand may lose the tie-breaker. Steps for a clean move are in the practical guide to obtaining your tax residency in Thailand.

Getting a certificate of residence

1. Get a Thai tax identification number at an Area Revenue Office.
2. File your Thai return for the year concerned (P.N.D. 90 or 91).
3. Request a certificate of residence from the Revenue Department, online or at your Area Revenue Office, naming the treaty country and tax year.
4. Send it to the foreign payer or tax authority, usually with their own treaty form.

Claiming reduced Thai withholding as a non-resident

If you receive Thai interest or royalties while living elsewhere, give the Thai payer a certificate of residence from your home country. The payer then withholds at the treaty rate. If too much was withheld, file a refund claim with the Revenue Department within three years.

Common mistakes (and what they cost)

• Assuming the treaty exempts foreign salary for work done in Thailand → work performed here is taxable here; you face the full Thai bill plus 1.5% monthly surcharge on late payment.
• Keeping a home abroad and assuming Thai residence wins → the tie-breaker hands taxing rights to your old country, and Thailand only credits part.
• Remitting income from a non-treaty country → no credit, so you pay Thai tax on top of foreign tax.
• Forgetting the certificate of residence → the foreign payer withholds at its full domestic rate, and refunds take months or years.
• Running a foreign company from Thailand for over six months → a Thai permanent establishment, with 20% corporate tax on the attributed profits.

Frequently asked questions

Does Thailand have a tax treaty with the United States?

Yes. The Thailand-United States treaty was signed in 1996 and has applied since 1998. It caps Thai withholding on interest at 10% or 15% and on royalties at 5%, 8% or 15%. Its saving clause means US citizens living in Thailand stay taxable in the US on worldwide income, so they rely on US foreign tax credits rather than the treaty to avoid double tax.

How many double tax agreements does Thailand have?

Thailand has around 61 comprehensive double tax agreements in force in 2026, covering most of Europe, Asia-Pacific, North America and parts of the Middle East and Africa. The Revenue Department publishes the full list with the full texts. Brazil and Portugal are among the notable gaps. Always check the list for the specific country and the date the treaty took effect.

Who counts as a Thai tax resident under a treaty?

Domestic law decides first: you are resident if you spend 180 days or more in Thailand in a calendar year. Most Thai treaties then define a resident as someone liable to tax there by reason of residence. If the other country also calls you resident, the tie-breaker looks at permanent home, centre of vital interests, habitual abode and nationality, in that order.

Can I claim a credit in Thailand for foreign tax paid?

Yes, if a treaty applies. Thailand grants a credit for tax paid in a treaty country on income that Thailand also taxes, including foreign income you remit. The credit is capped at the Thai tax on that same income. Without a treaty, individuals generally get no Thai credit, so the full Thai tax applies on top of the foreign tax.

Does a treaty protect my foreign income from the remittance rule?

Not automatically. The treaty decides which country may tax each income type, not whether Thailand taxes remittances. If the treaty gives the other country exclusive rights, such as for some government pensions, Thailand should not tax it when remitted. For most other income Thailand keeps its right and gives a credit for foreign tax instead.

How do I get a Thai certificate of residence?

Request it from the Revenue Department, online through its e-service or at your Area Revenue Office. You need a Thai tax identification number, proof of 180 days or more in Thailand for the year, and details of the treaty and income concerned. Foreign tax authorities and payers ask for it before they reduce withholding or exempt your salary.

Thailand tax guides

• Your tax guide to Thailand – every Thai tax, rate and rule on one page.
• Tax residency in Thailand – the 180-day test and its edge cases.
• Obtaining your tax residency in Thailand – your move plan, step by step.
• Ceasing your tax residency in Thailand – leaving cleanly, with no exit tax.
• Personal income taxes in Thailand – rates, remittance rule and filing.
• Personal tax deductions in Thailand – allowances and deductions for 2026.
• Tax breaks for expatriates and digital nomads in Thailand – LTR, DTV and flat-rate regimes.
• Capital gains taxation in Thailand – shares, funds, property and exemptions.
• Cryptocurrency taxes in Thailand – the 2025–2029 exemption and withholding.
• Specific taxes of Thailand – VAT, social security, inheritance and property taxes.
• Legal forms of business in Thailand – sole trader, limited company and foreign ownership.
• Corporate income tax in Thailand – 20% rate and SME bands.
• Business expenses in Thailand – what your business can deduct.
• Laws on tax fraud in Thailand – penalties, surcharges and time limits.

Related guides

• Tax treaties of Hong Kong – the other side of the Hong Kong-Thailand treaty.
• Your tax guide to Thailand – the full Thai system in one page.
• Tax residency in Thailand – when Thailand calls you resident.
• Tax landscape overview of Hong Kong – a territorial base with a Thai treaty.
• Tax landscape overview of Singapore – the regional hub with a revised Thai treaty.
• Tax landscape overview of Malaysia – a neighbour with its own remittance history.
• All country tax guides

Sources

• Thailand Revenue Department (English)
• Royal Thai Government Gazette
• OECD – Tax treaties
• OECD – Multilateral Convention (MLI)
• Hong Kong Inland Revenue Department – Comprehensive double taxation agreements
• PwC Worldwide Tax Summaries – Thailand (secondary cross-check)

This guide is general information, not personalised tax advice. See how we research and review.