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Tax residency is the status a country uses to decide which of your income it can tax. In Thailand, you become a tax resident once you spend 180 days or more in the country in a calendar year; your nationality and the type of visa you hold make no difference. Foreign income earned from 1 January 2024 onward, in years when you were a Thai tax resident, may be taxable when you remit it to Thailand, subject to applicable exemptions and the relevant tax treaty. The term is simply "tax residency" (the person is a "tax resident"); the residency test is set by Section 41 of Thailand's Revenue Code, which the Revenue Department administers.
Where tax residency comes up
You run into this term when you remit savings or a pension from abroad, when you file your annual tax return, or when you check what a double tax agreement between Thailand and your home country says about your income. Whether you count as a resident decides what you need to report, and for which year. We cover the remittance side in detail in tax on foreign income.
How tax residency differs from a visa
A visa, and any extension of it, lets you stay in Thailand. Tax residency is a separate status, decided only by your day count, and it affects your taxes alone. You can hold a DTV for years and never become a tax resident, as long as you spend fewer than 180 days in Thailand in a given calendar year. Equally, you can enter on various grounds, add up 180 days in that year, and become a resident regardless of what visa let you in. The DTV itself carries no tax advantage: if you spend 180 days or more in Thailand in a calendar year, the ordinary rules apply to you like anyone else.
What to check: day count and the year money comes in
Several things decide your tax position: how many days you spent in Thailand in each calendar year, where the money came from and when it was earned, whether you were a Thai tax resident in the year it was earned, the year you remit it, and any exemption or tax treaty that applies. We advise keeping a day count for every calendar year on its own, built from your passport stamps and boarding passes, together with records of when each sum was earned, so it is easy to match against the dates of your transfers. How arrival and departure days are counted is a separate question, covered in the 180-day rule: when you become tax resident.
Our lawyers check your days against your transfer dates, because the tax outcome depends on the year the money was earned and on your residency in that year. If you are not sure whether last year made you a tax resident, or whether a transfer is taxable, message us on Telegram or WhatsApp. We reply within 24 hours and explain what to do and what it will cost. See tax advice for foreigners.
