You can find free online tests. They should take at least 30 min. Do 3-4 different ones to confirm you get about the same score (less than 5 points difference).
If you live in a big city, you can probably find a place to do it for less than $100.
It looks like there is general distrust on the online tests (searching Reddit posts). Can you recommend a few if you know any?
I can't recommend any, but that it's why I mentioned doing a bunch of them and not just one.
A lot of companies provide that kind of thing, you can easily find (good and not that good) IQ tests by searching for "standardized IQ tests" (or the equivalent in your local language). You can also contact the Mensa organization and they can put you in contact with a testing coordinator (see https://www.mensa.org/mensa/about-us).
Thanks for the link. I searched the internet, but I couldn't figure out which ones are the good ones.
FWIW, I googled IQ Test and blindly clicked on the first link that appeared. Ran through 30 questions and when I clicked on submit - it prompted for a payment lol. Should've seen this coming!