Do I need a re-entry permit to maintain my retirement visa while traveling back to the US?

I always do my retirement visa and multiple reentry at the same time. You never know when you have to go back or leave for an emergency. Leave twice its cost is covered and it stops me worrying. I had a trip planned and needed to return to my home country 2 x.

But Todd is right.

I would say if you looked at the stamp in your passport it would read as "extension of stay permitted until" and have a date of August 2025 <- meaning you are on a yearly extension of stay

Now to leave the country and come back without cancelling that stamp when you exit the country you need to buy a "re-entry permit". You can do that at the immigration office where you got your extension issued OR at the airport before you fly out.

A single re-entry permit (lets you leave/come back once) is 1000baht and a multiple re-entry permit (lets you leave/come back as much as you want during your stamp) is 3800baht. Re-entry permits are valid as long as your current stamp is (so if you bought one it'd be good until Aug 2026 just like your next extension would be valid for)

As you're only going to the states once in April, then will be getting a new yearly extension in Aug a single re-entry permit would work for you.