When a TEFL certification expires: NEVER!
A TEFL certification is a lifetime qualification and never expires. It's worth noting that all TEFL certifications are not created equal. It's for life, so be sure to choose the right one.
Here are our top TEFL tips for choosing the right certification:
1. Make sure it's from a respected institute.
2. Go for the 120 hour version - this is the required number of hours in most countries.
3. Don't go for a discount version - you'll get what you pay for and you don't want to end up stranded in a classroom with bad lesson plans.
For more information on how to choose the perfect TEFL course, here are some resources: