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Does Bangkok immigration add or deduct days when applying for a visa extension before it expires?

Bangkok immigration visa extension Thai visa rules application process NON-O visa

Shane *******

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asked Jun 18, 2025

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Dear group 

Does Bangkok immigration office 

Add days to your current extension date 

Or deduct them if you go a week before expiry?

Thank you in advance.

Answer summary

When applying for a visa extension at the Bangkok immigration office, extensions typically add to the expiration date of your current visa stamp. You can apply for an extension up to 45 days before your visa expires. If the extension is for a different reason than your current visa, it may not extend your expiration date.

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Tod *********

Tod *********

As a rule extensions are added to the expiration date of your current stamp

The only time an extension isn't added to your current expiration date is if you are getting an extension for a different reason than you have the current visa/extension

In Bangkok you can go 45 days before your current stamp expires to apply for an extension

What stamp are you on now and what extension are you trying to get ?

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