When does the 2000 baht fine for late 90-day reporting in Thailand start to apply?

The fine for late 90-day reporting in Thailand starts after the 7-day grace period, meaning it applies from the 98th day, not the 91st. However, the fine is a flat rate of 2,000 baht regardless of how many days late you are, whether it's 8 days or 8 months. Additionally, reporting can be done up to 15 days before the due date and up to 7 days after the due date.