What is the minimum hotel booking duration needed for a 90-day Non-O visa application in Thailand?

For your 90-day Non-O eVisa application, booking a hotel for 30 days is generally sufficient. Many embassies typically only require proof of a short-term accommodation booking, often for as little as a week. This allows you to search for more permanent housing during your initial stay. Some additional comments suggest that confirming flight bookings may also be relevant, with a preference for flexibility in ticket types, especially for those planning to extend their stay based on marriage or retirement options.