Will I be considered as overstaying if my visa stamp expires on the same day I leave Thailand?

You have to check in for international departures 3 hours before so when you’ve done it go straight through security & then immigration.

You should still be on the 15th so no overstay

Let me try to explain as there is to much talk about incorrect visions:

Immigration gives you days to stay on entry starting on day of arrival.

Those who think it is arranged by hours or even minutes are wrong.

IF in this example, your stamp mention "Admitted until 15 Mar 2025" it simply means you have to leave Thailand BEFORE 23:59 hours on 15 Mar 2025.

So those who answer leave on the 15th are correct.

Now on airports the Immigration can use their flexibility, they might stamp your passport with overstay but NO fines if your overstay is less than 1 day.

Be aware ONLY on International Airports, NOT at border check points.

For those who try to explain otherwise and just claim I paid, please check your stamps.

Cross before midnight. You should be at the at least 45 mins before boarding also. And allow time to get to the gate also from immigration.

Never overstay under any circumstances even though you won't get a fine for that.

It will come back to bite you later.

Better you enjoy a lounge

No . Because you got stamped out on the 15th

No overstay

You will be fine, dont make the mistake the other way round, i waited to just after midnight to go through and was fined

I don't think so. Once you pass immigration, you have technically left the country. They couldn't even stamp you for overstaying unless they use a stamp in the future.

If you clear Thai Immigration before midnight, you will NOT 🚫 NOT be on OVERSTAY.