What is the recommended time frame to renew a retirement visa in Thailand before its due date?

When renewing a retirement visa in Thailand, it is recommended to start the process earlier rather than waiting until the last minute. Most immigration offices allow renewal applications up to 30 days before the expiration date, while some may extend that to 45 days. However, there is no strict 2-week limit for submission. Additionally, be mindful of the time required to gather necessary documents, such as a bank statement, which can impact your timing.