Renewing long-stay permission in Thailand means repeating the Immigration extension that matches your Non-Immigrant or Long-Term Resident (LTR) category each year, or at the interval your stamp shows. It is not the same as a one-off tourist extend your stay request, though both use form TM.7 at the desk. Build the folder around the checklist for work, retirement, family, study, or LTR status.
Which documents repeat every cycle?
Start with a valid passport, the TM.7 application, 4x6 cm photos, and copies of your prior extension and entry history. Immigration often asks for a Sor.Tor.Mor.2 acknowledgment showing your registered address or landlord consent, aligned with the TM30 your host filed.
Non-Immigrant B renewals typically need a current work permit, employer letter confirming salary and role, company registration, and tax evidence. If DOE issued a new permit after a job change, the Immigration file must match: get a work permit.
Retirement and many Non-Immigrant O cases bring bank statements at the threshold Bangkok or Chiang Mai publishes, plus health insurance that meets the category rules. Compare policy limits in choose health insurance before renewal week. Retirement-specific framing: retiring in Thailand.
LTR holders add BOI endorsement documents. Official LTR guidance expects a BOI confirmation letter dated within 60 days of the Immigration submission, alongside financial and insurance proof tied to the LTR subcategory.
Where and when do you submit?
File at the Immigration division responsible for your address. Bangkok's Chaeng Watthana office handles huge B and O queues; Chiang Mai and Phuket provincial offices serve northern and southern residents with their own hours and copy services. Arrive inside the published window before expiry, often about 45 days ahead for annual cases, so a missing employer letter does not force overstay.
Keep 90-day reporting current while you wait. An overdue TM47 notification can delay service even when your visa date looks fine: ninety-day report.
How do work, retirement, and LTR renewals diverge?
Work renewals live or die on employer compliance. If the company missed VAT, social security, or foreign-worker ratio rules, Immigration may deny the extension even when your personal papers look perfect.
Retirement renewals focus on sustained bank balances or income and acceptable insurance. A one-month dip below the required average can trigger a request for more months of statements.
LTR renewals add BOI portal steps before Immigration. Treat BOI approval and TM.7 as sequential, not interchangeable.
Common misconceptions
Calling the extension a "residence permit renewal" in European terms leads people to skip work-permit or insurance updates that Thai law still requires.
Assuming last year's photocopies suffice fails when Immigration updates checklists or when your bank balance period must be fresh.
Believing BOI promotion removes Immigration entirely is wrong for most employees. BOI shortens coordination, but TM.7 and evidence still land at Immigration.
Summary
Renew Thai long-stay permission by filing TM.7 yearly with fresh category evidence, address proof, and photos at your local Immigration office. Sync work permits, BOI letters, insurance, and 90-day reporting so the next permission-to-stay stamp matches how you actually live.
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