Hey guys, I’m coming to Thailand, a few months from now, and I qualify for a retirement visa. My question is do I have a certain amount of time to apply for retirement visa the O visa after I arrive on a VOA? 
thanks, cheers
TLDR : Answer Summary
An American arriving in Thailand qualifies for a Visa Exempt status instead of a Visa on Arrival. You are allowed to stay for 45 days, with a possibility of a 30-day extension. To apply for a retirement visa (O visa), it is crucial to secure a Thai bank account and have at least 800,000 THB transferred for two months before applying for the visa extension. Ensure to apply for the retirement visa extension while there are 15-21 days left on your initial stay to avoid complications.
NON-O RETIREMENT VISA RESOURCES / SERVICES
- Go to the Retirement Visa Section for information on requirements, including age restrictions, financial requirements, and necessary documentation.
- For immediate assistance, contact Thai Visa Centre directly via LINE at @ThaiVisaCentre or Email them.
- Explore recent discussions by using the Non-O Retirement Visa tag in the search box at the top of the page.
- Join the Thai Visa Advice Facebook Group to ask your questions, and get advice from others.