Can I extend my multiple entry O-A visa after traveling to Cambodia?

let's go over this using numbers I can understand

You got an OA visa issued on Sept 13, 2023

It has a must be used by Sept 12, 2024

You entered thailand on Nov 9th 2023 and got stamped in until the insurance policy you had expired on Oct 31st 2024

Your VISA <-(the thing that lets you ENTER thailand) runs out on Sept 12, 2024

So that means IF you're going to bounce out/back and get that "free second year" you need to get a year insurance and do it ON or BEFORE the 12th of Sept <- the date your visa expires

NOW if for some strange reason you want to get a year extension inside the country (which as I said makes no sense at all seeing as you can get a NEW year just by exiting/entering on the valid visa w/insurance)

you can apply for an extension when you have 30 days or less left on your current ENTRY STAMP <-(which expires on Oct 31st)

meaning you can apply for a year extension any time after Sept 30th AND when you get the new extension it will be good until Oct 31st 2025

@Álex *******

you can extend at your local immigration if you meet the criteria. You would need to do this before /2024. You would also need 800k baht in a Thai bank for 2 full calendar months before applying for the extension and a new year of insurance. You would also need a re-entry permit to keep the extension "alive" if you leave the country

𝗜𝘁 𝘄𝗮𝘀 𝗴𝗿𝗮𝗻𝘁𝗲𝗱 𝗯𝘆 𝗺𝘆 𝗰𝗼𝘂𝗻𝘁𝗿𝘆 𝗧𝗵𝗮𝗶 𝗰𝗼𝗻𝘀𝘂𝗹𝗮𝘁𝗲 𝗼𝗻 𝟭𝟯/𝟬𝟵/𝟮𝟬𝟮𝟯 𝗮𝗻𝗱 𝘀𝘁𝗮𝘁𝗲𝘀 "𝗺𝘂𝘀𝘁 𝗯𝗲 𝘂𝘀𝗲𝗱 𝗯𝘆 𝟭𝟮/𝟬𝟵/𝟮𝟬𝟮𝟰

𝗜'𝗺 𝗴𝗼𝗻𝗻𝗮 𝗲𝘅𝘁𝗲𝗻𝗱 𝗺𝘆 𝗶𝗻𝘀𝘂𝗿𝗮𝗻𝗰𝗲 𝗼𝗻𝗲 𝗺𝗼𝗿𝗲 𝘆𝗲𝗮𝗿 𝗮𝗻𝗱 𝗽𝗹𝗮𝗻𝗻𝗶𝗻𝗴 𝘁𝗼 𝘁𝗿𝗮𝘃𝗲𝗹 𝘁𝗼 𝗣𝗵𝗻𝗼𝗺 𝗣𝗲𝗻𝗵 𝗼𝗻 𝟭𝟰/𝟬𝟵/𝟮𝟬𝟮𝟰

Umm if you exit the country AFTER the visa runs out you get nothing

You need to LEAVE and RE-ENTER thailand on or BEFORE the date the VISA itself runs out which you say is Sept 12th.

AND

You need to have a new year of insurance (which will be added to your current expiration date as a rule when you get insurance..

So as long as you have new year insurance & enter the country on or before the 12th of Sept you will get stamped in for a new year OR as long as your insurance will be valid for up to a year, so you'll get stamped in until Sept 11th