Go to your local DMV/DLT and ask for requirements for converting your license, some do not need you to get a IDP if your license is in English.

You will likely need a Residence Certificate, and a Medical Certificate regardless of office.

Non-O before you arrive.

When you arrive, get your Thai phone numbers sorted. You can buy at airport. Price difference is negligible if staying long term and you can top up with regular price through the respective apps.

Use the first couple of weeks to sort out bank accounts, should be easy enough, but might require visits to a few branches.

I recommend Kasikorn.

When bank accounts are sorted transfer the money to the accounts and make sure the transfer is labeled as international.

That is the difficult things sorted.

In the last 30 days of your initial 90 day stay, head to Immigration to get a updated list of documentation they require for your extensions. Ask how many sets of copies they will want too.

There are local variables to how fresh they want the bank documentation to be as well.

And when you have all the required documents, make sure you have enough copies of everything.

Head to the Immigration Office again when your money has been in your Thai bank accounts for at least 2 months to extend.

And buy a multiple entry Re-entry permit if you are planning on traveling a lot.

Easy peasy, just need some planning.

On the TDAC the outward travel is OPTIONAL.

Anything without the red * is optional.

You do not need onward travel booked for the DTV.

Wise has a guide on this. International Transfers a bit down on this page covers how to get this sorted if it's not registered as a international transfer.

35/guide-to-thb-transfers

@Ian *******

it also has a minimal charge when converting your currency to THB.

@Wayne *******

Yes, but this is not fool proof. Read the part about International Transfers a bit down on this page.

35/guide-to-thb-transfers

@Jim ******

Yes, that would be correct. And there is no way around that regardless of what method you use

There will be a fee on all methods, every month.

Overshoot the amount to make sure all fees get paid and you still have above 65k on the other end of it.

Or, use something like Wise. If you use Wise you might need to contact the bank Wise deals with to prove that your transfers are international.

That is a very long under consideration stamp. What Immigration Office is this?

@Ludo *********

I do not know anything about the Belgian Embassy and if they give Affidavits anymore. You will have to ask them.

But my guideline is the norm for nationalities without access to the Affidavits.

Good luck.