Wiring foreign income into Thailand to fund a villa: the Por. 161/2566 remittance-tax rule

Does wiring money from abroad to buy or build on Koh Phangan trigger Thai income tax? It can — but only if two things are both true: you're a Thai tax resident (180 or more days in Thailand in the calendar year), and the money counts as your own foreign-sourced income rather than capital that was never taxable to begin with. Since 1 January 2024, Revenue Department Order Por. 161/2566 has closed a long-standing loophole that let residents avoid this tax entirely by timing their remittances.

The old rule, and the loophole Por. 161/2566 closed

Revenue Code Section 41 paragraph 2 has always said a Thai tax resident owes Personal Income Tax on foreign-sourced income remitted into Thailand. For decades the Revenue Department read this narrowly: tax applied only if the income was remitted in the same calendar year it was earned. Wait until the following January to wire the money, and it arrived tax-free — a well-known planning technique for expatriates and returning Thais alike. Order Por. 161/2566, issued 15 September 2023 and effective from 1 January 2024, reinterprets the same statutory text to remove that timing gap: a resident who remits foreign-sourced income now owes PIT on it in the year of remittance, no matter what year it was earned.

What's grandfathered: income earned before 2024

A follow-up clarification, Order Por. 162/2566, confirms the new rule isn't retroactive in substance: foreign-sourced income earned before 1 January 2024 remains exempt even if it's remitted to Thailand years later. The trigger is the tax year the income was earned, not just the year of remittance — a distinction worth documenting carefully (bank statements, pay dates, sale contracts) if you're moving pre-2024 savings.

This is separate from the FET form

Don't confuse this with the FET form — the Bank of Thailand foreign-exchange transaction document a receiving bank issues once an inward transfer of USD 50,000 or more clears, which the Land Office requires as evidence the purchase money genuinely came from abroad. A properly issued FET form proves the source and legitimacy of the funds for registration purposes; it says nothing about whether that money is subject to Personal Income Tax in your hands. A resident can remit fully FET-documented, legitimately-sourced funds and still owe PIT on them if they're current-year foreign income — the two questions sit with different agencies (bank/Bank of Thailand vs. Revenue Department) for different purposes.

Who this actually affects

• Non-residents are unaffected. If you spend fewer than 180 days a year in Thailand, you're taxed only on Thai-source income; foreign-sourced funds you remit to buy a villa fall outside Thai PIT entirely regardless of timing.
• Capital that was never 'income' isn't caught. Remitting savings already fully taxed in an earlier year, or principal that was never income at all (a gift already taxed elsewhere, loan proceeds), doesn't create a new PIT liability just because it crosses the border in a resident year — though the burden of proving the character and timing of the funds sits with you.
• Current-year gains are the real exposure. A tax resident who sells an overseas property, shares or other asset and remits the proceeds the same year to fund a Koh Phangan purchase is the clearest case Por. 161/2566 targets — the gain is foreign-sourced income remitted in the year it was earned.
• Retirees and DTV holders aren't automatically exempt. Pension income, investment income or consulting fees earned after becoming a Thai tax resident are foreign-sourced income like any other; only the source-year and remittance-year facts matter, not your visa category.

A more radical proposal is still just a proposal

A further reform floated by the Revenue Department — taxing Thai tax residents on worldwide income even if it's never remitted to Thailand at all, closer to a citizenship/residence-based system — was drafted but has not been enacted; 2026 reporting indicates it was shelved ahead of that year's elections. Nothing beyond the remittance-based Por. 161/2566 and Por. 162/2566 rules is currently law. Treat any claim that unremitted foreign income is now taxable as inaccurate unless a further order or amendment actually changes it.

Structuring the timing of a large remittance against your Thai tax-residency status is a Revenue Department income-tax question for a Thai tax advisor or accountant — it isn't something the FET-form process or your bank resolves for you. For the funds-transfer mechanics themselves, see Bringing money into Thailand: the FET form step by step; for the annual taxes that follow ownership itself, see Owner's taxes on Koh Phangan.