Thailand Tax Treaty Countries 2026: Complete List for Phuket Expats

Since Thailand changed its rules on foreign-sourced income in 2024, expats living in Phuket have been paying a lot more attention to their tax situation. The question I hear most often is: "Does my country have a tax treaty with Thailand, and does it protect me?"

The good news is that Thailand has double tax agreements (DTAs) — also called double taxation treaties or conventions — with over 60 countries. If your home country is on the list, the DTA provides a framework for preventing the same income from being taxed twice. The important caveat: a DTA doesn't automatically mean zero Thai tax. It means there's a set of rules for who gets to tax what, and how tax paid in one country offsets tax in the other.

The 2024 Thailand Tax Rule Change: Why This Matters Now

Before January 2024, a widely-used interpretation of Thai tax rules allowed expats to remit foreign income to Thailand tax-free, as long as they waited until the following calendar year to bring the money in. The Revenue Department changed this: from 1 January 2024, any foreign income that was earned in the same calendar year it is remitted to Thailand is assessable for Thai personal income tax (PIT), regardless of when the transfer is made.

For expats from countries with no DTA with Thailand (most notably US citizens), this creates real exposure. For expats from DTA countries, the treaty provisions still apply — but the interplay between the new remittance rules and DTA exemptions is nuanced and requires professional review. Our full Phuket expat tax guide 2026 covers the new rules in detail.

Full List of Thailand Tax Treaty Countries (2026)

Thailand's Revenue Department publishes the official DTA list. The following countries have signed and in-force double tax agreements with Thailand as of 2026. Note that treaty terms vary — the year of entry into force and the specific provisions differ between agreements.

Notable Countries WITHOUT a Thailand DTA

A significant gap in Thailand's treaty network is the United States. There is no US–Thailand income tax treaty, which means US citizens and green card holders living in Phuket face the most complex tax situation of any expat group. They remain subject to US worldwide income tax reporting and potentially US tax liability, while also potentially being assessable for Thai personal income tax on remitted income under the post-2024 rules.

How DTAs Work in Practice: Key Income Types

Government / State Pensions

Most DTAs follow the OECD model, which provides that government pensions (i.e. state pension paid by government, or pensions from government employment) are taxable only in the source country. So a UK state pension paid to a UK national living in Phuket should be taxable only in the UK, not Thailand — provided the DTA provisions are properly claimed. The same principle generally applies to Australian Age Pension, Canada Pension Plan, and German Rentenversicherung.

Private/Occupational Pensions

Private pensions (company pensions, personal pensions, SIPPs, 401(k)s, Australian super) are generally treated differently from government pensions in most DTAs. Many treaties assign taxing rights to the resident country (Thailand, in this case) rather than the source country for private pension income. This is a crucial distinction — many expats assume their private pension is "protected" by the treaty in the same way as their state pension. It often isn't. Take specific advice.

Dividends and Investment Income

DTAs typically set maximum withholding tax rates on dividends at source (often 15% for portfolio dividends, lower for substantial shareholdings). If Thai tax is payable on the same dividends, a credit is usually available for tax already withheld at source. The net result isn't always zero tax, but it prevents double taxation at the full rate of both countries.

Rental Income from Property Outside Thailand

If you own rental property in your home country and remit the rental income to Thailand, post-2024 rules make this potentially assessable for Thai PIT. DTAs may assign taxing rights on rental income to the country where the property is located (usually). But the remittance rules interact with this in ways that need professional analysis.

Employment Income

If you work remotely for a foreign employer while living in Phuket (as many Bang Tao and Rawai expats do), post-2024 rules create real Thai tax exposure on that income if it's remitted to Thailand in the same year earned. The Non-B visa and employment income in Thailand are a separate issue — for non-working visa holders earning from offshore, the DTA and remittance rules apply.

Claiming DTA Benefits in Thailand

Having a DTA doesn't automatically mean Thailand's Revenue Department applies it. To claim treaty benefits, you typically need to:

1. File a Thai personal income tax return (PND 90/PND 91) — due by end of March each year for the previous calendar year
2. Declare foreign-sourced income remitted to Thailand — even if you believe it's treaty-exempt
3. Claim the relevant treaty exemption or credit — reference the specific DTA article number in your filing
4. Provide supporting documentation — including proof of tax paid in the source country (e.g. P60 from HMRC, Notice of Assessment from ATO)

In practice, many Phuket expats have historically not filed Thai tax returns at all, particularly those on retirement visas with purely passive foreign income. Post-2024, this approach carries real risk. The Revenue Department has issued guidance indicating it intends to enforce the new rules. Working with a Thai tax professional — there are several good firms in Phuket Town and a few who specifically serve the expat community — is increasingly advisable.

Thailand's Tax Rates (for reference)

Thailand also allows personal deductions and allowances (e.g. ฿60,000 personal allowance, ฿190,000 for those 65+, 50% of employment income up to ฿100,000 for employment deduction) which can significantly reduce taxable income. See our full tax guide for the current deduction schedule.

For broader financial planning as a Phuket expat, see our guides on investment options for expats in Thailand, Phuket banking, and sending money to Thailand. Our retirement budget guide includes realistic tax cost estimates.

Last updated: January 2026 · DTA status and Thai tax rules change. Verify the current treaty status and filing requirements with the Thai Revenue Department (rd.go.th) or a qualified tax professional. This guide is for informational purposes only and does not constitute tax advice.

Written by

Fredrik Filipsson

Fredrik has lived in Phuket since 2019. He covers visas, healthcare, housing, banking, and the practical realities of daily expat life on the island. Everything he writes is based on personal experience.

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