How do you extend your stay in Thailand in 2026?

Most extension applications use form TM.7. Immigration publishes a standard extension fee, commonly 1,900 baht for many categories, but the decisive factor is your visa type and the checklist for that counter. Bangkok Immigration at Chaeng Watthana and provincial offices in Chiang Mai and Phuket run separate queues and sometimes different document lists, so download the instructions for the office you will visit rather than copying a friend's Bangkok folder.

Timing matters. Many categories expect you to apply within a window before expiry, often roughly 45 days ahead for annual Non-Immigrant extensions, while short tourist extensions may allow filing closer to the departure date. Overstay days trigger fines calculated at the desk before the officer accepts TM.7. Do not plan a silent overstay hoping to pay later without a mark on your record.

Your host should already have filed TM30 (the foreign-resident address report): TM30 address report. If you moved, fix accommodation reporting before extension day. Continuous stays beyond 90 days still need the separate TM47 notification: ninety-day report.

Tourist and visa-exemption extensions are capped and evidence-light compared with work, retirement, family, or study routes. Officers expect proof of funds, onward travel, or hardship reasons within published limits. They do not convert you into a work or retirement resident; they only buy limited extra time.

Non-Immigrant B extensions usually need employer letters, tax filings, work-permit copies, and company documents. Non-Immigrant O and retirement-related categories bring bank balances, insurance, or family evidence. ED extensions tie to school enrollment. Long-Term Resident holders follow BOI and Immigration joint checklists. Mixing documents from the wrong category is a common reason for denial.

Immigration stamps or prints a new permission-to-stay date in your passport and may issue a receipt you need for banks or landlords. That approval is not a re-entry permit. If you leave Thailand without TM.8, your remaining stay can end at the border: re-entry permit.

Annual Non-Immigrant renewals overlap with what many movers call residence renewal. When your category needs yearly proof rather than a one-off tourist extension, read renew a long-stay residence permission for the document set that repeats each cycle.