Spend 180 days or more in Thailand in a single calendar year and you become a Thai tax resident — which changes how your foreign income is treated when you remit it here. Enter your days and the tool shows exactly where you stand.
Enter a number above, or choose an arrival date and we'll count the days remaining until 31 December {{YEAR}}. The 180-day test counts every day you are physically in Thailand — they do not have to be consecutive.
Tax residency is only the first question — what you actually owe depends on your income types, remittances, nationality and any double-tax treaty. Always consult a qualified Thai tax adviser before acting. We take no commissions and this tool saves nothing.
Answer 6 quick questions and the engine matches your best-fit visa, then bundles your cost of living, schools and a full step-by-step move plan — so the tax side is planned, not a surprise.
Build my free plan →180 days in a calendar year makes you a Thai tax resident. Thailand's tax year runs 1 January to 31 December. If you are physically present in the country for 180 days or more during that window — consecutive or not — you are a tax resident for that year. Fewer than 180 days and you are a non-resident, taxed only on Thai-source income.
Since 1 January 2024, remitted foreign income is assessable. Under the revised interpretation of Section 41 of the Revenue Code, foreign-source income that a tax resident remits (brings) into Thailand is assessable Thai income in the year it is remitted. Foreign income that stays offshore and is never brought in is generally not assessed. This is a meaningful change from the old "next-year remittance" loophole, so the timing of transfers now matters.
LTR holders and treaties can change the maths. Most categories of the 10-year LTR visa carry an exemption on foreign income under Royal Decree 743, and Thailand's network of double-tax treaties can give you a credit for tax already paid abroad so the same income is not taxed twice. Whether either applies to you is fact-specific — get it confirmed.
Want the fuller picture on rates, allowances and filing? See our Thailand tax guide, weigh it against your cost of living, then build your free move plan.
180 days or more in a single calendar year (1 January to 31 December). The days do not need to be consecutive — every day you are physically present in Thailand counts toward the total, so several short trips add up the same way one long stay would.
Not automatically. Thailand taxes residents on Thai-source income and, since 1 January 2024, on foreign income that is remitted into Thailand in a year you are tax resident. Income kept offshore and never brought in is generally not assessed. Treaties may give a credit, and most LTR categories carry a foreign-income exemption under Royal Decree 743.
No. The test counts the total number of days you are present in Thailand across the whole calendar year. A few weeks here, a month there — they all add to the same running total.
No. It is a simple day-counter to show whether you cross the 180-day residency line. What you actually owe depends on your income, remittances, nationality, visa and any treaty. Always take advice from a qualified Thai tax adviser before acting.