Thailand Overstay: Fines, Re‑Entry Bans, and What to Do

Last updated: 22 Feb 2026.

Overstaying in Thailand is one of the fastest ways to turn a normal trip into a stressful (and expensive) mess.

This guide explains:

• how overstay fines are calculated
• when overstay triggers re‑entry bans
• why it’s worse if you are arrested vs you surrender/leave normally
• what to do if you accidentally overstay by a day

This is practical travel info, not legal advice. Rules can change and enforcement can vary. Always confirm details with Thai Immigration.

Quick rules (the traveler's version)

Overstay fine (common baseline)

• Fine is often described as 500 THB per day, up to a maximum of 20,000 THB (for common tourist/temporary overstays).

Re‑entry bans depend on how long you overstay

If you overstay long enough, you may be banned from re‑entering Thailand for a period that increases with the length of overstay.

Arrested vs surrendered matters

Thailand’s overstay ban rules are commonly described in two “tracks”: 1) You surrender / depart normally (less severe bans) 2) You are arrested and prosecuted (more severe bans)

How fines and bans are commonly described

If you surrender / depart normally

Bans are typically described as:

• Overstay more than 90 days → 1‑year ban
• Overstay more than 1 year → 3‑year ban
• Overstay more than 3 years → 5‑year ban
• Overstay more than 5 years → 10‑year ban

If you are arrested and prosecuted

Bans are typically described as:

• Overstay less than 1 year → 5‑year ban
• Overstay more than 1 year → 10‑year ban

These rules are widely repeated in immigration guidance material and provincial immigration notices.

What happens at the airport if you have an overstay?

Typical outcome:

• You are taken aside
• Overstay is calculated
• You pay the fine
• You receive an overstay stamp
• You may be denied boarding until resolved

If your overstay is long enough to trigger a ban, immigration can apply the ban at departure.

“I overstayed by 1 day” — what should I do?

• Don’t panic, but don’t ignore it.
• Go to the airport early and be ready to pay the fine.
• Be polite and keep your story short (“I miscounted the date”).
• Avoid arguing about exact hours; immigration decisions are not a negotiation.

How to avoid overstays (practical checklist)

• Put your permitted-until date in your phone calendar the moment you arrive
• If you plan to extend, start the process early
• If your plans change (illness, flight cancellation), gather proof and contact immigration promptly
• Don’t rely on “border runs” without checking your eligibility and risk profile

Related pages (next steps)

• Extensions + Re‑Entry Permits
• 90‑Day Reporting
• Visa Exemption
• Tourist Visa

Official references (start here)

• Overstay fine + ban summary (example provincial immigration document): https://buengkan.immigration.go.th/ita67/o7/02-%E0%B8%84%E0%B8%B9%E0%B9%88%E0%B8%A1%E0%B8%B7%E0%B8%AD%E0%B8%A0%E0%B8%B2%E0%B8%A9%E0%B8%B2%E0%B8%95%E0%B9%88%E0%B8%B2%E0%B8%87%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B9%80%E0%B8%97%E0%B8%A8%E0%B8%AF.pdf
• Overstay ban framework explanation (example immigration office notice): https://www.samutprakanimmigration.go.th/warning-of-overstay-in-thailand/