How many months of bank statements are required for a marriage extension in Thailand?

When applying for a marriage extension in Thailand, particularly using the 400,000 THB bank balance method, applicants often wonder how many months of bank statements are required. There seems to be some confusion, as different sources mention varying requirements—ranging from 3 to 12 months. However, the general consensus typically leans towards needing 3 to 6 months of bank statements for the application.