Right, the usual warning: I'm not an accountant, tax is personal, and this area is genuinely in flux right now. So treat this as a heads-up on what's changed and what to ask about, not advice you act on. For anything real, pay a Thai tax accountant, it's cheap next to getting it wrong.

If Phuket is home for part of the year Pair this with the Phuket guide, the DTV guide and the cost-of-living opinion so the tax picture matches the rest of the move.

First, are you even a tax resident?

This is the first line that matters. Under section 41 of Thailand's Revenue Code, spending 180 days or more in Thailand during a calendar year generally makes you resident for Thai domestic tax purposes. Spending fewer days does not automatically remove every Thai obligation: Thai-source income can still be taxable, and a double-tax agreement may contain its own residence tie-breakers.

What changed in 2024

The Revenue Department's current filing guide says a Thai tax resident may be liable on assessable foreign-source income earned in a tax year beginning on or after 1 January 2024 when that income is remitted to Thailand in the same or a later tax year. Income earned before 2024 is treated differently under the published guidance. The taxable amount can still be affected by the nature of the income, exemptions, deductions and foreign-tax credits.

What the official guidance says in 2026

As checked on 14 August 2026, the Revenue Department's published guidance still uses the 180-day residence test and the post-1 January 2024 foreign-income rule described above. Proposals and press reports do not change a tax return by themselves. Until a change is enacted and reflected in official guidance, use the published rule and ask a qualified adviser how it applies to your remittances.

Don't forget your home country Being taxed in Thailand doesn't automatically mean you stop owing tax back home, and double-tax treaties decide who gets what. This is exactly the kind of thing a cross-border accountant sorts in one conversation.

What to actually do

  • Work out whether you'll hit 180 days this year.
  • Keep records of what you earn, where, and when you bring it into Thailand.
  • If you're moving meaningful sums, get a Thai tax accountant before you do it, not after.
  • Don't rely on what worked a few years ago, the rules have moved.
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This guide is general information, not tax or legal advice. Tax rules change and depend on your nationality and circumstances. Confirm your position with a qualified Thai tax professional before acting.