How long can you teach English overseas? As long as you want to. I’ve been teaching in China for eleven years now. I have no plans to stop anytime soon.
Most jobs teaching English overseas don’t pay very well. Also, the jobs are usually one-year contracts with no guarantees of staying in one place very long. It is enough for a young person living on their own to have some fun, but not enough for a wife and family.
I have been lucky in finding higher paid, reliable, work, that allows me and my family to live in sufficient comfort.