What are the monthly income requirements for a marriage visa in Thailand for expats from the UK?

Government says 40,000 a month.

The wife and in-laws will be expecting 200,000 a month

Who wants to marry someone who doesn’t even have 400k lol

+ 1 million for inlaws, lol

Dont do it, save ya money...

1 gbp

400k per year or 40k per month

What immigration expects and what your wife will expect are vastly different numbers. Prepare for some pain

40K is easily done OUTSIDE of Sukhumvit. When I first arrived in 2004 my salary was 32k

If you're applying for a marriage visa inside Thailand you need 400k baht in a Thai bank. For the first extension you need 400k baht in a Thai bank 2 months before applying for the extension. For subsequent extensions you need to transfer 40k baht from overseas each and every month for 12 months before you apply for the extension, or just continue to use the 400k method

Some offices are not keen on the income method for thai spouse, it's worth checking where you will be staying.

40,000 THB per month or 400,000 THB on account.

First year, you need to deposit 400,000THB as soon as you get here. Then you only need to transfer 40,000 THB per month from as soon as you get here. This is small money. I really don't know any Farang that can survive on 40k. You need to apply for a Non-O Visa before coming to Thailand. A very easy process which you can do with the help of your wife.

I bring over a minimum of 100,000k per month and live very well on that. I'm 63 and my health insurance 132USD per month for 400,000USD coverage.

Here's the Official Royal Thai Embassy Portal where you can apply in most civilized countries.