Why is it necessary to leave Thailand every 3 months on a Non-O Visa based on marriage?

okay you can ONLY get a year-long, multi-entry Non-O visa from a thai consulate (some consulates issue it based on marriage with no proof of funds). That visa gives you a 90 day stamp when you enter thailand, when it runs down you go to a border, stamp out of thailand, stamp in&out of another country then stamp back into thaialdn to get a new 90 day entry stamp. You do that for the whole year the visa is valid for.

Now as to the answer to your second question;

no, to get a year extension inside the country you need to meet the proof of funds and submit the documents required for the type of extension you're applying for

@Paul ******

you don’t extend the visa - you get a new visa. If you leave/enter just before the visa expires you can get an extra 90 days.

@Peter ********

I have same visa. I work outside the kingdom so leaving before 90 days is easy. Just renew next year if still married. No need for me to deposit the money, yet.

@Peter ********

i have used the same visa as you for the last 5 yrs for me it suits its purpose could extend but quite happily going to Mae sai every 90 days and going to Savannakhet to renew visa i havent had any problems even when i do my report back for TM 30 ect always asked why not extend I just say not yet with a smile

@Tod ********

thx much appreciated.

if you're married to a thai, get a 90 day single entry Non-O visa, come in get stamped in for 90 days, then apply for the 60 day visit family extension for 1900baht at the immigration office.

That'd buy you 5 months without leaving the country.

OR

get a year-long, multi-entry Non-O visa based on marriage and then only use it for half the year (I know not the most economical choice :/ )

Why do you want a 6 month visa? What's your plans? You should make your own post and we may be able to answer your questions or help you out

if that was the case they'd be far easier to get then they are now

@Jani *******

also always wondered... I can only think they want to make sure we're alive and able to leave 🤣

@Jani *******

interesting question though. It would be nice to know what the original intention was.

@Mark ****

expensive or not depends completely on where you live

If so, he needs a re-entry permit, not an "exit-permit"

Mark Day: I thought the multiple entry re-entry permits were unlimited. Is this new?

No visa extends by leaving the country.

@Mark ****

can you travel out of the country on a single non O ? If so does it extend it another year?