Can I work on a Thai Non-O visa, or do I need a business visa?

Go to the labour department, they will put you on track or use an accountant/lawyer who will do it for you

It's easier for your employer to do the work visa for you rather than the family visa, as they're used to.

But seeing as you have it already, there should be no problem getting the work permit.

I am on Non-O dependant Thai child, and the visa part is a pain each year, but the work permit I never hear about, my employer just does it.

You can apply for work permit if you already have the non o (spouse) visa.

No need to apply for Non B visa. If you use Non B visa then u’ll have to leave the country immediately if you quit your job.

They scam you.

your employer is wrong 😮 You can indeed hold a work permit and legally work here while on an extension based on marriage to a thai national

Many employers will tell you that you can't, try to get you to get off the marriage extension and on to a Non-B because that way they have control over you 👎😡

Remember if you're on a Non-B visa/extension and quit or get fired you lose the extension when you stop working 😕

BUT

if you're on an extension based on marriage to a thai and quit or get fired you KEEP your visa extension because it's not based on employment but on marriage to a thai national.

That's why employers tell you to get off your marriage extension and go get a non-B instead

Tell them you'll just keep the marriage extension and only need them to get the work permit for you