Yes, you can use your salary with a valid work permit as proof of funds, but, No, you cannot do it just using your work permit.

Go to your local immigration office to get their latest requirements for a 1-year extension based on marriage, especially for financial requirements for work permit holders.

Then you have to ask your employer to provide company papers including tax documents as well as your own tax documents.

If you or your employer cannot meet those requirements (or they don't agree to provide company-related documents), you have to use the banked money method.

@Greg *****

, at most office allow you to apply for an in-country initial visa when you have 15 calendar days minimum remaining with your current stamp. Only a few offices requires 15 working days (21 calendar days usually) or more.

You don't have to do at the "original" office that issued your previous extension. But you have to apply for your extension at the office that serves your primary address of residence.

congratulations on your success

In theory, you go back to the entry point to correct the entry stamp.

No downside to going to the local immigration office to see if they can correct your stamp. The worst thing would be they say "No, you have to go to the airport you entered Thailand".

As you have a multiple entry visa, it could be easier just to go border bounce to activate a new entry on DTV than go back to the airport in Bangkok to correct the current stamp.

@Pete ******

, it (short stay at a hotel) wouldn't work for long-term extension at most immigration office. That is a measure only for tourism extensions.

@Lloyd *******

, is it ”free”? I know there is a 1-year extension by proving Thai nationality for the same fee of 1900 baht.

Let's sort some things related your post based on facts.

- Multiple entry is not available for Non-O for any reason through eVisa application

- Non-OA visa is available in your country only (not inside Thailand) and for being over 50 years old

- No RTE/RTCG around Thailand issues multiple entry Non-O based on retirement

- No more "in-person" RTE/RTCG in Southeast Asia as of 1 Jan 2025 (edited)

- You can apply for single entry Non-O based on retirement inside Thailand (by having 800K baht in a Thai bank account) or outside Thailand. Then following 1-year extension for the same reason in Thailand and a re-entry permit

- You cannot apply for Non-O visa based on spouse to a Thai without legal marriage

We are not going to speculate wild options.

@Andrew ****

, Please consider these facts, sort your idea, and make a new posts.

As mentioned, 1-year extension based on being over 50 can be applied 30 days in advance in most provides. Some accept 45 days remaining with your current stamp.

The procedure at the immigration office is on-spot (means within a day, a few hours) at most offices. There could be a few offices that you have to go back in a couple of days max.

Other than that, it all depends on how fast you can collect the necessary paperwork, including the lease agreement, bank letter and transaction record, etc. Technically, it's possible to get it done within a few days trip with being well prepared.

Better to try to contact your local office for their latest requirements in advance for preparation.

Don't forget to apply for a re-entry permit AFTER you get a new 1-year extension inked into your passport.

@Phil *****

, oh, no. Sorry to have to deliver a bad news. In general, you cannot apply for an extension for medical reason if you are on overstay. Medical extension is available only when you are on a valid stamp.

I'm afraid you have to keep on being on overstay until you can leave.

@T**

would confirm this later. Just hoping I'm wrong about this.