Do I need to have £18,500 in my bank account for 2 or 3 months before applying for a Non-O retirement visa?

When applying for a Non-O retirement visa from the UK, you do not necessarily need to have the required £18,500 in your account for a certain number of months. Instead, it needs to be in your account at the time of application, with no specific 'seasoning' requirement in place for a British bank account. However, if using the monthly income method, you would need three months of bank statements showing an income equivalent to 800,000 Baht annually.