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A typical situation assembled from practice; details are changed.
The request
A US citizen in his fifties sold his business in 2022 and began living in Phuket in 2025 on a DTV, for a long Muay Thai training programme. He lives on dividends and interest from a US brokerage account and rent from a house in the US. He spent 150 days in Thailand in 2025 and 205 in 2026. He feared being taxed twice and believed the DTV protected him, so he asked what Thailand taxes and what the US still taxes.
What we found
A DTV runs for five years and allows up to 180 days per entry, plus one in-country extension of 180 days for THB 1,900 (ThaiLawOnline, September 2026). That is long enough to become a tax resident. The visa gives no tax relief, and 180 days or more in a calendar year make you a Thai tax resident (ThaiLawOnline, September 2026; PwC, 24 August 2026). He was not a resident for 2025 and is one for 2026. His DTV was issued before 31 August 2026, so the new filing and police-certificate rules do not touch it (ThaiLawOnline; DTVThaiVisa).
Thailand taxes income earned from 1 January 2024 in resident years when it is remitted. Savings, earlier income and income from non-resident years are not taxed on remittance (per Brer Rabbit Legal, July 2026, on Por. 161/2566 and 162/2566). The rules are stated as of 6 October 2026. Thailand credits foreign tax only where a treaty allows it (PwC, 24 August 2026).
The US side does not move. The US-Thailand income tax treaty has been in force since 15 December 1997 (HLB Thailand). Summaries by HLB Thailand and terms.law say its savings clause keeps US citizens taxable in the US on worldwide income, with a foreign tax credit. They do not quote the treaty's property article, so we read the treaty text itself.
| Money (illustrative amounts) | Thai tax on remittance | What we kept |
|---|---|---|
| Savings from the 2022 sale, THB 3,000,000 | None | Sale papers, statements with dates |
| 2025 dividends and interest, THB 400,000 | None: a non-resident year | 2025 brokerage statements |
| 2026 dividends and interest, THB 600,000 | Taxed when remitted | Year-end brokerage statements |
| 2026 rent from the US house, THB 300,000 | Taxed when remitted | Rent records, treaty article on property |
What we did
- We counted his days by calendar year: 150 in 2025, 205 in 2026.
- We listed his income by stream, year and source, and collected the statements that show when each payment arrived.
- We read the treaty text on property income and residence. His US preparer covers the US return and claims the credit for Thai tax paid, so we agreed the dates and amounts with him.
- We planned the remittance. His living costs for the year come from the savings and the 2025 income, and the 2026 income is remitted only as needed.
- We obtained his tax ID (TIN) and put the PND 90 return for 2026 into the plan. The paper deadline for 2025 income was 31 March 2026 (Forvis Mazars, 31 October 2025); we expect 31 March 2027 for 2026 income, but the Revenue Department has not announced the 2027 dates. After filing, his preparer gets a copy of the return and the payment receipt.
The result
He knows which dollars he can bring in free of Thai tax and which are taxed. Whether Thailand credits US tax on a given stream depends on the treaty text, and the US credit for Thai tax depends on US rules, so we gave him no single figure. In another case the outcome depends on the documents and each tax office.
The takeaway
A DTV gives you the right to stay, not a tax status, so a US citizen past 180 days plans the remittance around Thai tax and keeps the papers for a credit.
Our approach to taxes is on the page Thai taxes for foreigners. More on the rules: the 180-day rule and tax on foreign income in 2026. A related case on savings: 180 days and a savings remittance.
