When is the due date for my 90-day report after entering Thailand on a Multi Entry Retirement Visa?

and I can see by the clock on the wall that this topic has ran it's course

Thanx one and all for the comments

Best of luck to the O/P and their 90 day report

The TM30 can be done online. It takes some work though, especially if you haven't done it before. If you are close to an office it's probably easier to go there.

The first after each entry should be in person? Is that correct?

yes 90 days from entry Thailand , always.

Yes but go to immigration right away to do a new paper TM30.

Yes

31 October 2026

but do it even 10 days in advance

You need TM30 from the owner

The first after each entry should be in person not online

Don't forget the owner of the place he is staying has to file a TM30.

Do not forget to do the TM30 if you are not staying in a Hotel.

In Udon Thani I normally go to Immigration myself within 24 hours of arrival and there they will also male a 90-day report for me and give me a slip saying when it will be due next time.

I would say you're not on ANY visa :O and instead (from that stamp) it would appear you're here on a yearly extension (as you say based on retirement) and you bought a re-entry permit as well.

The Non-RE on your entry stamp means you entered on a RE-entry permit :)

Your next 90 day report is due 89 days from the date you stamped in last. The day you stamp in is day one.

So seeing as you stamped in Aug 3, your 90 day report is due on Oct 31st. You can file a report from 2 weeks before the due date until 1 weeks after the due date without any issue. ..