The Destination Thailand Visa gives you 180 days per entry. Thai tax law makes you a resident at 180 days in a calendar year. Same number, different clocks — and the border run that resets one leaves the other running.
The DTV is a five-year, multiple-entry visa. Each time you cross the border you get 180 days, counted from the day you arrive. Leave and come back — even for a lunch across the Malaysian border — and the count starts again at day one. You can extend a stay once, at a local immigration office, for another 180 days.
This clock only cares about the current stay. It has no memory of your last one.
Thailand's Revenue Code makes you a tax resident if you are present in the country for 180 days or more in a calendar year. Not 183 — 180. The days need not be consecutive, and leaving does not reset anything: a week in Bali in June is simply a week that does not count, while the days on either side of it still do. The only reset is 1 January.
Tax residency means Thai-sourced income is taxable, and — since 2024 — foreign income you bring into Thailand is, in principle, taxable in the year you bring it in. The details of that rule have moved more than once; what has not moved is the day count that switches it on.
Say you arrive on 1 February and leave on 20 July. That is 170 days: under the per-entry limit, no extension needed. In September you come back for a month of good weather.
Days on this entry. 150 to go before immigration cares.
170 from the spring plus 30 now. You crossed 180 on 10 September and are a Thai tax resident for the year.
Nobody at the border will mention it, because the border runs clock one. The Revenue Department runs clock two, and it reads the same immigration records — after the fact.
The reverse trap also exists: one long stay with an extension, 1 March to the end of the year, never troubles immigration and puts you at 306 days for tax.
Both clocks count the arrival day and the departure day in full. Immigration treats the day you land as day one; the tax count treats any part of a day in Thailand as a day in Thailand. A 23:50 landing is a day on both. Count generously and you will never be surprised.
Daysabroad ships both clocks as templates: Thailand — stay per entry counts from your last border crossing and starts over on the next one; Thailand — days in the year totals the calendar year and warns before you reach 180. Both are fed by the same automatic log of your crossings, so a border run moves one tile and not the other — exactly as it should.
Add the trips you took earlier this year by hand, or say "I'm still here" for the stay you are on, and the year tile catches up from the first day.
No. A border run resets the per-entry stay on your DTV. The tax count is a total across the calendar year and only resets on 1 January.
180. Being present for 180 days or more in a calendar year makes you a tax resident for that year — three days earlier than the 183 most countries use.
Yes, on both clocks. Immigration counts the arrival day as day one, and for tax any part of a day in Thailand counts as a day.
Once per entry, at a local immigration office, for a further 180 days — up to 360 on a single entry, which is well past the tax threshold if it falls within one calendar year.
Daysabroad logs your border crossings automatically and shows the per-entry stay and the year total side by side — free, on your iPhone, with nothing sent anywhere.
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