Can I extend a 90-day Non-O visa or get a tourist visa in Thailand?

The 30 day Exempt Entry stay can also be Extended for 30 days at a Thai Immigration office for 1900 Baht.

Another suggestion now that you mentioned you're waiting for paperwork to go get an ED visa would be to go to the border, stamp out of thailand, stamp in&out of another country and stamp right back into thailand to get a 30 day visa exempt entry stamp.

You could also extend that stamp by 30 more days if you needed to as well

@Ka***

, overstay fines are 500 baht a day and cap out after 40 days overstay at 20K baht, you are banned from thailand for a year if you overstay more than 90 days and turn yourself in, if you're caught out on an overstay of under 1 year you're banned for 5 years.

An overstay is NOT the way to go..

@Ka***

, I would say go to the thai consulate in Vientiane and apply for a single entry tourist visa. That consulate is the most user friendly and you will have no problem getting a single entry tourist visa there.

Be advised, while a tourist visa is valid for 90 days all that means is you have that long to enter thailand and get stamped in for 60 days. You could extend that by 30 more days at the immigration office though for 1900baht

If you are unable to provide the documentation to get an extension on that Non-O visa at the immigration office you could go to a thai consulate in another country and get a single entry tourist visa. It would stamp you in for 60 days when you arrived and you could extend that by 30 more days at the immigration office for 1900baht.

You could go to just about any thai consulate in a nearby country to get one. A lot of people go to the consulates in Vientiane Lao or Penang Malaysia to get tourist visas.

For what reason did you get the 90 day Non-O visa?