The four clocks of your Thai stay — and none of the four warns you

Living in Thailand is not administratively difficult. It is unforgiving — there are four deadlines running at the same time, they have different lengths, they reset for different reasons, and none of the four sends you a reminder.

Clock 1 — the annual extension

Your permitted stay ends on the date stamped in your passport on entry — not on the end date of your visa. Those two are constantly confused; look at the stamp.

You apply for the extension at the immigration office of the province where you live, usually in the last thirty days before that date. What you bring: passport, the TM30 receipt (see below), your updated bank book with a letter from the bank, passport photos, a map to your home and the forms.

And the condition most people underestimate: on the retirement route there must be 800,000 baht in a Thai account in your name — as a rule two months before the application and three months after. No withdrawals in between. A balance that dips below the threshold for a moment can cost you your extension.

Expect offices to differ from one another in what they ask. On your first visit, ask straight away what they want to see next time.

Clock 2 — the ninety-day report (TM47)

Whoever is in Thailand for more than ninety consecutive days reports their address to Immigration every ninety days. That is the TM47, and it is not an extension of your stay — it is a separate report with its own counter.

The window is narrow: you can submit from fifteen days before the due date until seven days after. The first report you make in person or through an authorised representative at your own office; after that it can be done online.

And this is the detail that trips people up: the counter resets as soon as you leave the country and come back. If you go to the Netherlands for two weeks in March, your ninety days start again on the day of your return. That is favourable — but it also means you have to recalculate the date, every time.

Clock 3 — the re-entry permit

This is the most expensive avoidable mistake of this destination, and it is entirely preventable.

If you leave Thailand without a re-entry permit, your granted stay lapses the moment you depart. Even if there are still six months on your stamp. You come back as a tourist, and the whole process — Non-O, money in the account, extension — starts again.

The permit can be arranged the same day at Immigration or at the airport, in a version for a single journey and a version for multiple journeys. If you go to the Netherlands or to a neighbouring country even once a year, take the multiple: the price difference is small and the mistake is fatal.

Clock 4 — the 180 days

If you stay in Thailand for 180 days or more in a calendar year, you are a tax resident there. That happens automatically — it is not a choice and not an application.

As a resident you pay Thai tax on your Thai income and on the foreign income that you bring into Thailand. Since 2024 that has become stricter: foreign income earned from 1 January 2024 onwards is taxed as soon as you transfer it — in the same year or in a later year. The old practice of waiting until the next tax year no longer works.

See AOW, pension and tax in Thailand for how that interacts with the 1975 treaty.

And the zeroth clock: your landlord's TM30

This one isn't in the list of four because it isn't yours. Your house owner, hotel or head of household must report within 24 hours that a foreigner is staying with them — the TM30.

Yet it is your problem if it doesn't happen. Immigration asks for that receipt at your extension, at a change of address and at the ninety-day report. Without a TM30 you get stuck or receive a fine. Ask your landlord about it explicitly, keep the receipt, and know that the report has to be made again if you move or come back from a trip abroad.

Put them in one diary

Four deadlines, four counters, four reset rules. Whoever keeps track of that loosely will slip up at some point, and with two of the four — the extension and the re-entry permit — that mistake cannot be repaired with a fine.

Put them all in one diary, with the bank condition of clock 1 in it separately as a distinct reminder two months ahead.

In Vertrekklaar this is phase 5 of 5 of the journey: the same steps, but applied to your situation — in your order, tickable, and with the deadlines monitored. See the whole journey to Thailand.