90 day border run

[superal]

I have searched in the visa forum archives and cannot find  posts concerning my question which is.

     On a 90 day border run with a non "o" s/e visa , what amount of time are you allowed to be out of Thailand when you will receive another countries stamp on your passport ?     As we all know to leave Thailand and retain your s/e visa validity you  have to get an exit visa .

[jacko45k]

I guess you mean you have a SE Non-Imm O and have a re-entry permit. You need to return before the date shown on the re-entry permit, which is also the date you will be stamped in until. It should be clear on the permit under Valid Until and Length of Stay Until.