How long can I stay in Thailand with tourist permits by leaving and re-entering?

The duration you can spend in Thailand with tourist permits largely depends on the discretion of the immigration officer. There is no strict rule like the 180 days in a year commonly suggested, but after prolonged stays—typically around the 6-month mark—issues may arise. Expats have shared experiences of successfully using tourist visas and extensions for up to 222 days. Strategies like obtaining a Multiple Entry Tourist Visa (METV) can maximize your stay, allowing for nearly nine months with effective planning. However, entering Thailand multiple times on tourist visas without returning home may trigger scrutiny from immigration, requiring proof of onward travel and sufficient funds.