@Pe***
, If you are applying for an extension of stay based on marriage to a thai you can meet the financial requirements two ways:
Bank 400K baht in a thai bank account in your name for 2 months prior to you applying for your extension
OR
get a notarized letter (Stat Dec) from your consulate stating you get 40K baht or more per month in income from abroad.
Extension are issued for a year at a time, but extensions based on marriage go under consideration for 30 days before you go back and get the year extension inked into your passport.