How Do I Renew My Non-O Married Visa in Bangkok?

you can't use the online appointment system to get extensions based on marriage.. There is no choice for it and if you select retirement (which is the same section) they won't accept it.

Keep in mind as long as you meet the requirements you can get a new yearly extension in Bangkok when you have 45 days or less left on your current stamp. No need to wait until this one is almost expiring, you won't lose any days going early because they add the new year extension to your current expiration date.

Get your bank letter, update your bank book, get the required documents and you and your wife head on out there to apply. I'd say get there around 9:15-9:30 and you should be out by 10:30-11:00.

They'll give you a 30 day under consideration stamp and then you go back when that expires to get the year extension inked into your passport