Related: O-A retirement visa · Health insurance guide · Non-O in-country alternative · Non-O extension docs

Who the rule covers

The Thai MFA and Immigration Bureau guidance, checked 13 September 2026, applies the health-evidence rule to the first O-A application and to an extension based on O-A status. O-A is a distinct route; this page does not generalise its insurance rule to every retirement status.

Coverage amount and period

Rechecked 13 September 2026: central consular guidance and Immigration Order No. 12/2568, clause 2.22(6) publish medical cover including COVID-19 of at least USD 100,000 or THB 3,000,000. For an O-A-based extension, cover must last for the requested stay; permission is limited by the policy period and cannot exceed 1 year at a time.

This is a total medical-expense threshold. The current guidance replaced the older split thresholds for outpatient and inpatient benefits. Pages still presenting only the older split amounts should not be used as the current first-application rule.

Thai and foreign policies

  • Thai policy: the Royal Thai Embassy in Madrid requires the policy showing the coverage and stay period. Its instructions also require the unified insurance certificate for both Thai and overseas policies, not just a policy copy (rechecked 13 September 2026).
  • Foreign policy: official guidance accepts qualifying overseas insurance, but requires the prescribed foreign-insurance certificate signed by the authorised insurer or public organisation.
  • Foreign government welfare: the Thai MFA guidance recognises qualifying foreign government welfare with the required coverage and authentication.

Authentication requirements for a foreign certificate can depend on the issuing country and responsible Thai mission. Use that mission's current O-A checklist before purchase or submission.

If an insurer refuses coverage

For an O-A-based extension, clause 2.22(6.3) provides a documented fallback when coverage is refused in whole or in part: qualifying Thai-bank funds of at least THB 3,000,000 held for at least 2 months before filing, or qualifying deposits plus other insurance reaching THB 3,000,000. Refusal evidence and its required certification are essential.

Keep the funds separate. The order excludes income or deposits already counted toward the ordinary retirement financial test. The Madrid application instructions, rechecked 13 September 2026, also separate their health-evidence fallback from ordinary O-A living-expense funds. Confirm the application-stage documents with the receiving authority.

This is not a general self-insurance election. The refusal documentation and the exact post-specific checklist matter.

Use the official certificate and insurer portal

The Thailand General Insurance Association's official long-stay portal publishes the O-A guidance, participating Thai-company route, and foreign insurance certificate. The portal states that an overseas certificate must be signed by an authorised person of the insurer or public organisation.

This guide does not compare premiums or promise insurer acceptance. Confirm age limits, exclusions, renewal terms and hospital billing directly with the insurer, then verify that the evidence meets the authority’s requirement.

Extension evidence

Clause 2.22 separates the evidence routes: Thai insurance uses the approved policy form; foreign insurance or government welfare needs the prescribed certification from the foreign embassy in Thailand or the specified notarisation route. A refusal alternative needs its own supporting documents. Ask the office handling the extension which form and authentication route applies; embassy visa-application instructions are not a substitute for the extension checklist.

Official sources checked