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Is it too late to apply for a marriage visa extension 20 days before the expiry date in Thailand?

Jul 25, 2025
10 days ago
Toño *******
ORIGINAL POSTER
Hello everyone,

Is it too late to apply for a marriage visa extension 20 days before the expiry date? (doing it before it complicated for me now)

I read that it can take 3 weeks or more to get it done and i don't know if that should happen before the visa expires.

Thanks
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TLDR : Answer Summary
It is not too late to apply for a marriage visa extension just 20 days before the expiry date. You can apply for an extension when you have 30 days or less left on your current visa stamp. The processing time for the application can take around three weeks, but this does not affect the validity of your extended visa, as the extension is effective from the date of application.
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Roslyn **********
You can apply right upto and including the expiry date of your visa. You will then be given another 3 or 4 weeks while 'under consideration '.
Anthony ******
What’s expiring your 90 day Non O or are you already on an extension ?
Graham ******
@Anthony *****
It makes no difference as the requirements will be the same ;)
Anthony ******
@Graham *****
I was trying to to establish what he was trying to to exactly
Tod *********
I believe you're confusing the process of applying for an extensions with the process of applying for in country 90 day Non-Imm visa <- which requires you have so many days left on your current stamp (most offices are minimum of 15 days, some offices (Chiang Mai) are 21.

At most immigration offices you can apply for an extension when you have 30 days or less left on your current stamp (Some Bangkok, Chiang Mai, Samut Prakan, etc allow you to do it when you have 45 days or less left)

You don't lose any time applying for a new extension (for the same reason) because the extension is added to the expiration date of your current stamp

So you can apply for a new yearly extension based on marriage from 30 days before right on down until the day your current stamp runs out..
Toño *******
ORIGINAL POSTER
@Tod ********
thank you Tod
Lloyd ********
20 days before is a prime time to renew, the 3 weeks you are thinking about is the under consideration period, don't worry about that, you will still have a valid extension.
Toño *******
ORIGINAL POSTER
@Lloyd *******
Thank you Lloyd
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