Thailand Overstay Fine Calculator (2026)

Every foreign national in Thailand is granted a permitted stay period stamped in their passport upon entry. Staying beyond this date — even by a single day — constitutes an overstay under the Immigration Act B.E. 2522. The fine is ฿500 per day up to a maximum of ฿20,000. However, the monetary fine is only part of the risk. Thai immigration maintains records of all overstays, and longer violations trigger progressively serious consequences including re-entry bans and blacklisting. For a full breakdown of penalty tiers and blacklist rules, see our Thailand overstay rules 2026 guide.

Overstay fines are assessed at the departure point — whether airport, land border, or seaport. Immigration officers will identify the overstay, calculate the fine (฿500 × number of days, capped at ฿20,000), and collect payment before allowing you to board or exit. Payment is typically cash only at many checkpoints. You cannot leave Thailand without settling the fine. In some cases, individuals with significant overstays may be detained briefly while the fine is processed.

If you are currently overstaying, voluntarily presenting yourself at the airport is generally the best course of action. Approach the immigration counter before check-in, declare your overstay, pay the fine, and depart. Voluntary surrender demonstrates good faith and is treated more leniently than being caught at a random checkpoint. For a complete breakdown of how airport surrender works and the differences between voluntary and police-caught overstays, read the full Thailand overstay rules guide. You should carry your passport, sufficient Thai baht to cover the fine, and your outbound flight ticket. The process typically takes 30–90 minutes at major airports.

Thai immigration applies re-entry bans based on overstay duration. An overstay of 90 days to 1 year may result in a 1-year ban. An overstay of 1–3 years may trigger a 3-year ban. An overstay of 3–5 years may result in a 10-year ban. Overstays of 5+ years risk a permanent ban. These bans are recorded in the Thai immigration system and apply to all future entry attempts. Being caught by police during an overstay (rather than leaving voluntarily) typically results in more severe treatment including possible detention and deportation.

The most effective way to avoid overstaying in Thailand is to track your visa expiry date and act before it arrives. Always check the date stamped in your passport — this is your permitted stay date, not the expiry date of your visa sticker. Common options to extend your stay legally include: applying for a visa extension at an immigration office (usually ฿1,900 for 30 days), leaving Thailand and re-entering, or applying for a longer-term visa type (retirement, education, work, or marriage). Never rely on memory alone for critical dates.

Many overstays are unintentional — travellers lose track of permitted stay dates, especially when managing multiple entries, extensions, and 90-day reporting. ThaiVisaFlow provides automatic deadline tracking with reminders sent 30, 14, 7, and 1 day before any visa or reporting deadline. Our free tracker lets you monitor all your visa dates in one place — so you never accidentally overstay again.