Thailand visa overstay: consequences and how to fix it

The fine

Every day beyond your permitted stay accrues a fine of 500 baht, capped at 20,000 baht, which is reached at day 40. The fine is payable at departure, in cash, at the immigration desk that processes the overstay, and the same tariff applies when an overstay is regularised at an immigration office in the course of a lawful extension. Children under a certain age are typically not fined, and a single day's overstay caused by a late-night flight is often waived at officer discretion, though nobody should plan around that.

The ban thresholds

Since 2016, re-entry bans have applied automatically once an overstay reaches 90 days. Crucially, the bans differ depending on whether you leave voluntarily or are caught.

The asymmetry is the whole message. A person 100 days over who walks into the airport, pays 20,000 baht and flies out receives a one-year ban. The same person stopped at a checkpoint faces detention at the Immigration Detention Centre, deportation proceedings at their own expense, and a five-year ban. Voluntary departure is always, without exception, the better route.

At the airport versus under arrest

The airport process for a voluntary departure is administrative: the officer calculates the fine, takes payment, stamps the overstay, and applies any ban automatically in the system. It is unpleasant but brief. Arrest is a different world: police custody, transfer to immigration detention, court appearance for the overstay offence, a fine imposed by the court, then detention until deportation is arranged and paid for, which can take weeks. Overstayers are also exposed at every routine ID check, hotel registration, and domestic flight, so the idea of quietly waiting out a long overstay inside the country carries constant risk.

How to cure an overstay properly

• Under 40 days over: book a flight out, arrive at the airport early, carry the fine in cash, and depart. If the total overstay will remain under 90 days, no ban applies and a clean return later is realistic.
• Approaching 90 days: the threshold is a cliff edge. Leaving at day 85 costs 20,000 baht and no ban; leaving at day 95 costs the same money and a year of exclusion. Treat the 90th day as immovable.
• Still in status but about to overstay: extend instead. A standard 30-day extension at immigration, or conversion to another status where eligible, is always cheaper than the cleanest overstay. Our briefing on changing visa type inside Thailand covers what is possible.
• Long overstays: take advice before moving. Departure logistics, the receiving country, and how the exit is documented all affect the record you carry into future applications, in Thailand and elsewhere.

An overstay record never disappears from the immigration system, even after a ban expires. Future visa applications, extensions and long-term programmes all involve an officer reading that history. Candour, and evidence that the episode was cured correctly, matter.

How overstays actually happen

Few overstays are reckless. The common causes are mundane: reading the visa's validity date instead of the handwritten permission-to-stay date in the entry stamp, which is the one that governs; assuming an extension application in progress protects the stay when it was never actually filed or was refused; illness or hospitalisation across a deadline; and dependants whose dates were never diarised separately from the principal's. The permission-to-stay stamp is the only date that matters, and checking it on arrival, for every family member, prevents most of the cases we see. Where genuine incapacity causes the overstay, medical evidence should be gathered at the time, not reconstructed later; officers have discretion and documentation feeds it.

After the cure

A cured short overstay is survivable: many people return uneventfully on new visas once any ban lapses. What the record punishes is pattern and concealment. For clients with an overstay in their history who now want a serious status, retirement, LTR, or eventually permanent residence, the file needs assembling with more care, and sometimes a candid explanatory letter. This office has managed both ends of that problem, the urgent exit and the rehabilitated return, and the earlier we are involved, the more options remain open.

This briefing is general information, not legal, tax or investment advice. Thai rules change frequently and individual cases differ. Verify current requirements with the relevant authorities, including the Immigration Bureau, the Board of Investment, the Land Department, the Department of Business Development and the Revenue Department, and take advice on your own facts before acting.