Hi. If I apply for a Non O visa Single entry from the Thai consulate in London can I then apply for a 1 year retirement visa in Thailand after the 90 days has finished? Or do I have to leave the country to get the yearly Retirement visa?

No such thing as a "Retirement Visa"

The closest 1 yr visa based on retirement is a Non O-A.

That visa is a multi entry visa based on retirement however has an insurance requirement.

The other option is a single entry Non O based on either marriage or retirement.

That provides a 90 day stamp and in the last 30 days you can obtain a 12 month extension.

If the Non O you obtain in UK is based on retirement your first extension needs to be based on retirement.

If the Non O is based on marriage then likewise first extension would be on marriage.

You can change the basis of extension after that.

Don't really understand OP post.

Why would you obtain a Non O marriage then wish to obtain extension based on retirement.

Do you have a Thai Bank account?

11 minutes ago, DrJack54 said:

No such thing as a "Retirement Visa"

The closest 1 yr visa based on retirement is a Non O-A.

That visa is a multi entry visa based on retirement however has an insurance requirement.

The other option is a single entry Non O based on either marriage or retirement.

That provides a 90 day stamp and in the last 30 days you can obtain a 12 month extension.

If the Non O you obtain in UK is based on retirement your first extension needs to be based on retirement.

If the Non O is based on marriage then likewise first extension would be on marriage.

You can change the basis of extension after that.

Don't really understand OP post.

Why would you obtain a Non O marriage then wish to obtain extension based on retirement.

Do you have a Thai Bank account?

It's a Non O single entry retirement visa not a marriage but thanks for replying. All I wanted to know was if I could extend to the yearly retirement after my single entry Non O had finished.

22 minutes ago, Bell1234 said:

Hi. If I apply for a Non O visa Single entry from the Thai consulate in London can I then apply for a 1 year retirement visa in Thailand after the 90 days has finished? Or do I have to leave the country to get the yearly Retirement visa?

You can apply for a 1 year extension of stay, not a visa. But basically yes, you can, I did the same. You need THB 800k (actual or equivalent) for the non O in the UK and will need THB 800k in a Thai bank for the subsequent extension.

42 minutes ago, Bell1234 said:

It's a Non O single entry retirement visa not a marriage but thanks for replying.

Sorry, misread your post.

You can obtain the Non O (retirement) eVisa in UK then enter Thailand.

You will be stamped in for 90 days.

Transfer the 800k to your Thai Bank and after seasoned for two months apply for 12 month extension.

Note: not required to show the 800k for extension was transferred from abroad.

If you plan to travel abroad obtain a reentry permit. Multi or single.