What is the fine for not completing the 90-day check-in after renewing my Non-B visa in Thailand?

Okay, SOME immigration offices 'reset' your 90 day count down clock when you get a new yearly extension of stay. (you can NEVER renew a visa or an extension :/ ). BUT if they do that you'd get a new 90 day report receipt in your passport like you get when you file a 90 day report.

IF you get a new extension and don't get a new 90 day report receipt in your passport the count down clock was NOT reset and you do your 90 day report when ever it's due.

@Thomas **********

if you're traveling again soon then you can get away without doing this 90 day. The next time you travel and re-enter the 90 days will start again and you can report as normal after that. I've done this myself without any hassle at airports or immigration and didn't have to pay any fines

I also had this issue renewed my Non-b visa without leaving the country. I then went to do my normal 90 day check in and was told I didn't need to do it as I had just got my new visa. Then went back on the date they said; then the same guy tried to fine me for being 84 days late.... So had to pay some tea money (1000 THB) then after insisting on a receipt got it back...

my error: mine was 30-day visa

If its your 90 day reporting :

2000 baht

fine: B500 per day (i overstayed 4 days & paid 2,000 total)