If you want to settle in Thailand and stop crossing borders, the extension of stay is the route — a once-a-year renewal you do inside the country for a government fee widely cited at 1,900 baht. This is the plain-English version: how the retirement and marriage extensions work, the documents you bring, where and when to apply, and how it differs from visa runs and re-entry permits. Factual information only, never paid placement.
An extension of stay is the renewal you do at a Thai immigration office, inside the country, to keep living here without leaving — government fee widely cited at 1,900 baht. The two big long-stay versions are retirement (age 50+, financial qualification) and marriage (married to a Thai). Apply at the office for your address, in the last few weeks before your permission expires, with the full document set — and buy a re-entry permit before you ever fly out.
Editorial analysis compiled and periodically refreshed by BAANLYY’s research team — not a live data feed.
Analysis last reviewed July 2026.
The word people reach for is “visa,” but most settled long-stay foreigners are not really living on a visa — they are living on an extension of stay. The distinction matters. Your visa is the entry document that got you into Thailand; your permission to stay is the stamp that says how long you may remain. An extension is the application you make, inside Thailand, to renew that permission for another period — typically a year — without leaving the country. The core government fee is widely cited at 1,900 baht. Crucially, an extension is granted against existing Non-Immigrant status: it renews what you have, it does not conjure status out of nothing. If your underlying status lapses, there is nothing to extend. None of this is legal advice; confirm current rules with Thai Immigration.
Two extension types cover the large majority of foreigners who settle here, and they have different bases and different financial thresholds:
Based on age plus a financial qualification — widely documented as an 800,000-baht seasoned deposit, 65,000 baht monthly income, or a qualifying combination. No work permitted. See our retirement guide.
Based on marriage to a Thai national — a lower threshold, commonly cited as a 400,000-baht deposit or 40,000 baht monthly income, plus genuine-marriage evidence. See our marriage visa guide.
Both are renewed annually. The figures above are orientation only — Immigration sets the exact amounts and seasoning periods, and they have been revised before, so verify the current numbers before you move any money.
Most failed applications fail on paperwork, not eligibility. The widely used checklist runs roughly like this — confirm your office’s exact list before you go:
Carry originals and copies, sign where required, and bring cash baht for the fee. A single missing bank letter is the classic reason people get sent home to return another day.
You apply at the immigration office that covers your registered address — Chaeng Wattana in Bangkok, or your provincial office — not just any office. Timing is a balance:
Offices set their own windows and queue systems, some with online booking, so check your specific office’s current process before you turn up.
Three tools get tangled together. Keeping them separate is half the battle:
This is the section worth re-reading. An extension of stay is tied to a single permission to stay, and that permission is cancelled the instant you fly out of Thailand — even with months left on your year. Leave without a re-entry permit and you do not just lose the trip’s convenience; you lose the extension, and you would have to rebuild it from scratch, re-seasoning the money and re-gathering the documents. The fix costs about 1,000 baht (single) or 3,800 baht (multiple) and takes minutes at the airport counter. The discipline is simple: never leave the country mid-extension without the permit in your passport.
An extension is not “set and forget.” Alongside the annual renewal, long-stay life carries a few recurring duties that run on their own clocks:
Treat the extension as the anchor and these as the satellites. Miss a satellite and you can complicate the anchor.
The foreigners who renew their stay smoothly every year are the ones with a stable long-stay base and their visa admin squared away. Explore residences and neighbourhoods built for long-stay foreigners, and the visa-housing guides that match each route to the right home.
General information only — not legal or immigration advice. Thailand’s extension-of-stay fees, financial thresholds, forms and procedures change over time and vary by office; confirm current requirements with Thai Immigration or a qualified local adviser before relying on any of the above. BAANLYY never takes paid placement.
Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.