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How many days before the expiration can you apply for a visa extension in Thailand?

Mar 25, 2025
9 days ago
Thomas ********
ORIGINAL POSTER
Anyone know how many days before the last day of your 180 days you can apply for an extension?
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TLDR : Answer Summary
You can generally apply for a visa extension in Thailand when you have 30 days or less remaining on your current visa. In larger immigration offices, such as those in Bangkok, Chiang Mai, or Phuket, the application can be submitted when you have up to 45 days left. It's also possible to apply right up until the last day of your current visa if you meet all requirements.
Brandon ************
In most immigration offices you can apply for an extension when you have 30 days or less left on your existing stamp.

At a some immigration offices, especially the larger ones (Bangkok, Chiang Mai, Phuket, etc) you can apply when you have 45 days or less left.
John **********
Right up until the last day if your confident you meet all the requirements