It looks like a mistake and it is not. The one-year O-A visa requires an insured sum of 3,000,000 baht. The ten-year O-X visa requires only 400,000 baht inpatient and 40,000 baht outpatient per policy year. The trade-off sits elsewhere: the O-X accepts only an approved Thai insurer, and the cover must run without a single interruption for the entire period, or the visa is withdrawn.
The two rules side by side
The O-A is renewed annually and accepts a foreign insurer, provided the Foreign Insurance Certificate is completed. The O-X runs up to ten years, is open to applicants over 50, and requires a policy from a Thai insurer approved by the local regulator. Both start at age 50.
Why the longer visa asks for less
Because it asks for something harder instead. A ten-year commitment from a locally regulated insurer, verifiable at any time in the domestic system, gives the authorities more certainty than a larger sum insured with a foreign company they cannot audit. The lower figure buys tighter control.
The continuity requirement is the real constraint
On an O-A, a lapse in cover is a problem discovered at the next extension. On an O-X, holding the policy throughout the granted period is a condition of the visa itself, and failing it means the visa can be withdrawn. Over ten years that turns an administrative detail into a long-term obligation: every change of insurer has to be seamless.
Which one fits which situation
The O-A suits someone who wants flexibility, keeps an international policy, and does not mind an annual renewal. The O-X suits someone settled for the long term, comfortable with a Thai insurer, and who would rather deal with immigration once than every year. The insurance question decides more of that choice than most people expect.
What continuity means in practice
Ten years is long enough for a lot to change: an insurer withdraws a product, premiums rise beyond what you planned, or you simply want to move. On an O-X none of those can create even a short gap in cover. Any switch has to be arranged so the new policy starts the day the old one ends, with the paperwork ready in advance. That is manageable, but it has to be understood on day one rather than discovered in year four.
The question to settle before choosing
Ask yourself one thing: in ten years, do you expect to still be in Thailand? If the answer is a confident yes, the O-X removes nine annual trips to immigration and asks for less cover. If there is real doubt, the O-A keeps a foreign insurer and a portable contract, which matters if you move on to another country.
How to decide between the two
Answer one question honestly: in ten years, do you expect to still be living in Thailand? A confident yes points to the O-X, which asks for less cover and removes nine annual filings. Genuine doubt points to the O-A, which keeps a portable foreign policy and matters if you move to another country.
Frequently asked
Can I switch from O-A to O-X later?
It is a new application rather than a conversion, which means meeting the O-X conditions at your age on that day, including the insurer's entry limit.
Does the O-X figure apply per year or in total?
Per policy year: 400,000 baht inpatient and 40,000 baht outpatient for each year of cover.
Can I hold a foreign policy on an O-X?
No. The O-X requires cover from a Thai insurer approved by the local regulator, for the whole period.
What happens if my insurer stops offering the product?
You must move to another approved insurer with no gap in cover. Start the switch well before the old policy ends, since a new application at an older age can hit an entry limit.
Is the O-X open to a spouse?
Yes, and the same insurance conditions apply to each person covered, individually.