Can I enter Thailand on a tourist visa, marry a Thai partner, and switch to a non-immigrant O visa?

Is it necessary to enter Thailand on a TR60 visa before getting married? Can this not be done on a visa exempt entry?

These are the steps you need to take to enter and get married here;

1 - Enter on a tourist visa, get stamped in for 60 days

2 - go to the ACS (American Citizen Services) at the US Embassy in Bangkok get the affirmation of freedom to marry notary document

3 - get it and the data page of your passport translated into thai at a translation shop

4 - get those certified as accurate at the Ministry of Foreign Affairs

5 - find an Amphur and register your marriage

6 - go to the immigration office pay 2000baht and apply for an in country 90 day Non-O visa based on marriage to a thai, get an under consideration stamp

7 - when that stamp runs out go back to the immigration office, get your Non-O visa and a new 90 day stamp

8 - when that stamp runs down to back to the immigration office pay 1900baht and apply for a year extension based on marriage, get a 30 day under consideration stamp

9 - when that stamp runs down to back to the immigration office and get the year extension inked in.

First... Your plan to enter Thailand with a tourist visa if good.

Second... as you are marrying a Thai man there is no financial requirements for either of you.

You will apply for the Non O visa married to a Thai inside Thailand followed by a one year extension of stay based on marriage to Thai.

Suggest you look at the Phuket sandbox plan for your entry into Thailand. Your Thai boyfriend can join you in Phuket for 14 days enjoying Phuket island together.

Rather than doing 14 days quarantine locked up in a hotel room in Bangkok.