How long do I have to leave Thailand after receiving my DTV?

Depends on the embassy that you are applying via, but most say you shouldn’t apply more than 2-3 months in advance. That being said, besides saying when you will go, the embassy nor immigration will know when you actually go and if you end up going later, that is fine. However, if on the application you said you are not going for 6 months, they might not review it any time soon

✅ A visa to stay in Thailand for 180 days, with unlimited entry and exit, is valid for 5 years. If you stay less than 180 days and then exit and re-enter, the visa is valid for 1 year. If you stay for the full period, you can renew it. Once you have completed the period, you must exit and re-enter, and continue the same cycle for up to 5 years.

For example, if A stays in Thailand for 179 days, leaves Thailand for 1 day, and returns to Thailand again, the count will start from 1 again. This can be done for 5 years.

In case B, if you have been in Thailand for 180 days and do not leave, you can request to stay for another 180 days (the fee for each extension is 1900 baht). When the 360 ​​days have passed, you must leave Thailand and re-enter, counting from 1 again, and request to stay for another 180 days. You can do this for 5 years.

Once you receive your DTV you have five years in which to enter Thailand.