Can I travel out of Thailand after submitting my extension application for a Non-O Marriage visa?

You may or may not be contacted or visited by an immigration officer during that first under consideration period. So be sure you talk with the immigration officer about your travel abroad plan when you apply for your 1-year extension.

General information for a 1-year extension based on marriage to a Thai is attached. You need to get the latest and your local immigration office version of the handout before you apply for an extension.

𝗧𝗵𝗲 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁 𝗳𝗼𝗿 𝟰𝟬𝟬,𝟬𝟬𝟬 𝗕𝗮𝗵𝘁 𝗶𝗻 𝗺𝘆 𝗯𝗮𝗻𝗸 𝗶𝘀 𝘀𝘁𝗶𝗹𝗹 𝗺𝗮𝗻𝗱𝗮𝘁𝗼𝗿𝘆 𝘄𝗵𝗲𝗻 𝗜 𝗮𝗽𝗽𝗹𝘆 𝘁𝗵𝗲 𝗳𝗶𝗿𝘀𝘁 𝗲𝘅𝘁𝗲𝗻𝘀𝗶𝗼𝗻? 𝗜 𝘁𝗼𝘁𝗮𝗹𝗹𝘆 𝗳𝗼𝗿𝗴𝗼𝘁 𝗮𝗯𝗼𝘂𝘁 𝘁𝗵𝗶𝘀 𝗮𝗻𝗱 𝗿𝗲𝗺𝗼𝘃𝗲𝗱 𝗺𝘆 𝗰𝗮𝘀𝗵 𝗳𝗿𝗼𝗺 𝗧𝗵𝗮𝗶 𝗯𝗮𝗻𝗸 𝗿𝗲𝗰𝗲𝗻𝘁𝗹𝘆...

You need to show the 400K baht was in a thai bank account in your name only for 2 months before you apply for your extension. SO you do the math and see if you will have your funds seasoned the required time before you apply. There is no 'wiggle room' or 'leeway' on this it's 2 months seasoning (date to date) on the date you apply.

SO to use your example, IF you're applying on Oct 17th you would need to have the funds in the account at or above the 400K baht balance since Aug 17th.

𝗔𝗺 𝗜 𝗮𝗯𝗹𝗲 𝘁𝗼 𝘁𝗿𝗮𝘃𝗲𝗹 𝗼𝘂𝘁 𝗳𝗿𝗼𝗺 𝗧𝗵𝗮𝗶𝗹𝗮𝗻𝗱 𝗮𝗳𝘁𝗲𝗿 𝗺𝘆 𝘀𝘂𝗯𝗺𝗶𝘀𝘀𝗶𝗼𝗻 𝗲𝘅𝘁𝗲𝗻𝘀𝗶𝗼𝗻 𝗯𝗲𝗳𝗼𝗿𝗲 𝗜 𝗿𝗲𝗰𝗲𝗶𝘃𝗲 𝗲𝘅𝘁𝗲𝗻𝘀𝗶𝗼𝗻 𝘀𝘁𝗮𝗺𝗽? (𝗲𝘅. 𝗜 𝘀𝘂𝗯𝗺𝗶𝘁 𝗲𝘅𝘁𝗲𝗻𝘀𝗶𝗼𝗻 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗼𝗻 𝟭𝟳𝘁𝗵 𝗢𝗰𝘁, 𝘁𝗵𝗲𝗻 𝘁𝗿𝗮𝘃𝗲𝗹 𝗼𝘂𝘁 𝗳𝗿𝗼𝗺 𝗧𝗵𝗮𝗶𝗹𝗮𝗻𝗱 𝗼𝗻 𝟮𝟬𝘁𝗵 𝗢𝗰𝘁)

When you apply for your yearly extension for 1900baht you will get a 30 day under consideration stamp (which is the first month of your new year extension) AND once they give you that you would need to BUY a re-entry permit (1000baht for single, 3800 baht for multiple) so you could exit return and keep that under consideration stamp 'alive' when you stamp back in

Keep in mind you HAVE to be back in the country and go to the immigration office on the date that under consideration stamp expires or you will lose the extension and have to start all over over from zero