Thailand overstay fine calculator

Estimate the standard monetary overstay fine using the official published rate of 500 baht per day, capped at 20,000 baht. Enter the permitted-until date and the date being checked. This arithmetic does not decide exemptions, waivers, detention, entry bans or the amount an immigration officer will assess.

See the calculation.

Late days = max(0, departure − expiry). Standard fine estimate = min(late days × 500, 20,000) THB.

A worked example

3 days × 500 baht = 1,500 baht. The mathematical cap is reached at 40 days.

What the result leaves out

The embassy warns of consequences beyond a fine. This tool predicts none of them and does not encourage a late departure. It applies no one-day waiver or age exemption. Confirm your actual position with official immigration guidance.

For help choosing inputs, read the worked guide for this calculation.

Primary reference: Royal Thai Embassy, Canberra: overstay regulations
Checked 23 October 2026 · Source date: 2023-04-11.
Standard estimate, no clearance or ban prediction