How long do I need to stay out of Thailand before reapplying for the 60+30 day visa extension?

Get a Visa.

No specific time....i did a border jump straight over straight back...but do it a few times you might have an issue.

The same day.

I just did 60+30+border run Lao+60+30 - no questions asked. Yesterday I did my 30 days extension in Jomtien.

Just dont exceed 180 days within a 365 day period.

Just pay an agency to do the border bounce in Laos, or Malaysia. You can still return without the help of an agency, but there is a small chance you will get denied entry.

If you get the 60 day visa exempt stamp and extend by a further 30 days at the Immigration office, Immigration class you as a tourist. If you then attempt to enter again on a visa exempt stamp, Immigration rightly consider that after on 90 day stay in the country that you are no longer a tourist but that you are attempting to live long term in the country. While there is no legal limit to the number of Visa exempt entries, once the Immigration officer believes that you are no longer visiting the country as a tourist he will deny you entry. If you have already stayed for 90 days on a visa exempt entry, then in future to guarantee entry into Thailand, you need to obtain a long term visa suitable to the reason for your stay.

Out of interest: Thailand has recently cracked down on foreign nationals abusing visa-free entry. Between January and May 2025, immigration officers denied entry to approximately 8,193 foreigners, many suspected of entering under the guise of tourism to stay long term in Thailand or work illegally.

Nobody can answer this accurately. If you are still inside Thailand and want to get another visa exempt entry then I'd suggest using a border bounce company, they won't take you unless they can get you back in

There is no offical time or limit but you have to convince the immigration officer your a tourist and therefore no need to get a long term visa.

There is no certain time, but, immigration is cracking down on people using back to back visa exempt stamps, it also depends on which border you're using and either flying in or crossing a land border.