Can I apply for an extension of stay in Thailand if I need to travel for business while on the current extension?

New extension of stay obtained within 30 days of current extension expire date,

Re entry stamp on new extension,

Apply for Thai pass to return to Thailand asap.

You will need a Thailand Pass and meet its requirements to reenter Thailand.

If you are given an under consideration stamp you must return on that date to get the full extension inked in. Of course you’ll need a reentry permit. But it will only apply to the extension you are on when applying for it. You seem confused to buy one on your current extension then apply for a new extension and think the permit will be active on your new extension.

Background...it appears he is on one year extension of stay as Married to Thai

"Hi all,

I originally obtained a non-o visa based on marriage visa in Savannakhet (in 2019) - then in May 2020 I applied for an extension of stay based on Marriage (which was issued). I now need to apply for another extension of stay.

I assume i just need to complete the required forms again with the required evidence (400k in bank) - I am assuming that i do not need to apply for a Visa again. Can you confirm if my thoughts are correct?

- I can apply for my extension of stay 1 month prior to my current extension of stay expires.

- I can use the same evidence as prior year (except updated bank book showing 400k in bank or 40k per month salary).

I have already been to immigration to get the latest set of requirements (Jomtien Immigration)

tia for your responses."

9/

If you get an extension of stay before you leave, make sure you get it BEFORE you get a re-entry permit.

Extension of stay based on?

Should be no problem at all, you will apply within 30 days of current expiration.