What visa options are available for my husband to stay in Thailand longer as my spouse?

No expert, but after the recent change I have had to go back to a Non-Immigrant B which allows stays of up to 3months - option of single entry, and after a few visits apply Multi-entry. Be careful of the definition of business/meetings as opposed to work. I go for business meetings but one factory I visit recently had a bunch of contractors caught out installing equipment which quite obviously counts as work.

Simple - All you need is ID/proof of funds/current location - and an business invitation letter which I get 2 or 3 from the suppliers I am visiting.

With a single you can get an exit stamp which allows another entry within a month.

.....my husband and me (I)...

So what does your husband do in the business that he needs to stay in Thailand longer.

It sounds like you intend doing this long term? If so, the best way would be for your husband to obtain a 90 Day Non O visa based on marriage to a Thai citizen from the UK. He then needs to apply for a 12 month extension of stay in Thailand each year. He will need to have a bank balance of at least 400,000 baht in a Thai bank account in his name only to be able to apply for the extension and that needs to be there for 2 to 3 months before the application.

Check with your local immigration office in Thailand to find out how to apply and what documents etc. they require – as they all want different things.

The only problem he will have is that he will need to stay in Thailand for 1 to 2 months after he makes the application.

Once he has the extension he needs to get a re-entry permit – either single entry or multi entry before he leaves Thailand. If he leaves without that – his extension of stay will be cancelled and he will need to go through the whole process again.

He can obtain a new extension every year and again, the 400,000 needs to be in his account 2 to 3 months before applying.

How about the Thai Elite Visa. Costs a bit but he can come and go as he pleases.

The visa is the least of the problems. The problem comes if your husband should work in your business as it takes a work permit, which takes a company with a paid up capital of 1 mill. THB when married and 2-4 Thai workers. If he is merely the owner or investor and your family knows the police officer in the area, then he can stay in the shop without a work permit as long as he is not interacting with (Thai) customers.

What's a "little longer"?

Will you also be in Thailand?

It's possible to get a 90 day Non-O visa based on marriage before travelling to Thailand. It's also possible to get a 60 day extension based on "visiting Thai family" which would give a total of 150 days

Thai wife visa is not really good for you … she has to accompany you and there is a lot of paperwork plus 30day notice period before you get visa .. so an extra trip …if old enough retirement better … apply from home country and extend in thai

If your husband has to work in your business, you have to deal with Labor Office. A marriage visa should be fine.

Non immigrant, based on marriage. Basically you need 400k thb and little paperwork. Need kor ror 22 from or bor tor if I remember well, and marriage certificate from uk

Get Metv, it's multi trip 6 months visa , easy to get and approved in a matter of days or since married get the Non O and renew every year if going stay Thailand long term an not the uk