Can I transition from a Thai Elite visa to a Non-Immigrant 'O' visa based on marriage without leaving Thailand?

Please visit counter #7 at Pattaya Immigration and ask them exactly. AI answer: No, you generally cannot directly convert a Thailand Privilege Visa (Elite Visa) into a Non-O visa (Retirement/Support) within Thailand without significant steps, as the Elite Visa is a separate long-term program, requiring you to exit Thailand and apply for the Non-O visa from a Thai Embassy/Consulate abroad, or follow a complex process of cancelling Elite status and then potentially applying in-country if eligible as a tourist first, but leaving and re-entering is often cleaner for a fresh Non-O.

Key Steps & Considerations:

Understand the Difference: Elite is a luxury program; Non-O (Retirement/Support) is for long-term stay based on age/income or family ties to a Thai citizen.

Exit Thailand (Recommended): The most straightforward path is to cancel your Elite membership and leave Thailand, then apply for the Non-O visa at a Thai embassy in a neighboring country (like Malaysia, Laos, Cambodia).

In-Country (Complex):

Cancel Elite: You must first cancel your Elite membership, which involves contacting Thailand Privilege and Immigration.

Transition to Tourist: After cancellation, you'd get a short stay extension (often as a tourist) to sort out your documents.

Apply for Non-O: Then, you apply for the Non-O (Retirement/Marriage) from within Thailand (at Bangkok Immigration, Chaeng Wattana) before your tourist status expires, meeting all financial/marriage requirements.

Timing is Crucial: For any change in Thailand, you usually need at least 15-30 days left on your current permission to stay.

In summary, it's not a simple "switch"; you're essentially ending one long-term status and applying for a new visa category, often best done by leaving and re-entering to avoid complications.

My friend went from Elite to the LTR visa then sold the elite

Seamlessly no. You need to leave the country when your thai privilege expires and either return on a visa exempt entry and apply for a Non-O based on marriage at your local immigration office or perhaps easier to apply for it at a consulate while out of the country

Cannot convert anything, have to leave and apply for a Non O outside Thailand or enter on a visa exemption if you hold a bank account and apply in country.