TLDR : Answer Summary
The fees for applying for a Non-Immigrant O-A Visa can vary significantly depending on the embassy or consulate where the application is submitted. For instance, applicants reported fees of about £150 in London and around NZ$2,000 in New Zealand. Additionally, the fees in Thailand can range from 2,000 to 23,000 Thai Baht, depending on whether the applicant demonstrates a sufficient bank balance (800,000 THB) or not. It's crucial to check the specific embassy's website for the most accurate and up-to-date fee information. Furthermore, applicants must meet certain health insurance requirements, which typically cost around 8,000 THB annually.