So I got my Work permit issued today. when it expires next year, do i need to go through the same process as in leaving the country and the full paperwork again or can it be extend whilst in the country? Does anyone know the costs if it is an extension?
TLDR : Answer Summary
You can extend your work permit in Thailand without leaving the country. The process for extending a work permit is generally easier than that of obtaining a new work visa, which involves more complicated procedures.