Can I apply for an extension on my 90-day visa in Thailand as a US citizen married to a Thai person?

Take your wife with you

You need to go to the main immigration in Hua Hin rather than Blúport.

If the marriage is registered in Thailand, you can, for example, apply for a 60-day extension married to a Thai citizen.

Yes, as a US citizen on a 90-day visa, you can apply for a 60-day extension at the immigration office. Since you're married to a Thai citizen, you may also have options for longer extensions. However, if you want a one-year extension, you’ll need to provide proof of having 400,000 baht in your bank account for at least two months. If you're short on cash, you can still get the 60-day extension or leave the country and come back. Additionally, if you prefer to avoid the long wait times and lines, you can hire an agent to handle the process for you. That's what the officials told me when I was extending my husband's Non-O visa. Good luck!

You can either extend for one year if you meet the requirements or you can apply for the “visit Thai family” extension for 60 days. Both options cost 1,900 baht.