TEFL and TESOL are often used interchangeably, but CELTA is a different, more intensive qualification — and which one you choose can limit the jobs you are eligible for. Here is the honest breakdown.
What each one covers
- TEFL — Teaching English as a Foreign Language. The broadest and most common entry-level certificate, usually 120 hours online.
- TESOL — Teaching English to Speakers of Other Languages. Often used as a synonym for TEFL, though some providers add more classroom methodology.
- CELTA — awarded by Cambridge. The most rigorous option, with observed teaching practice.
- Trinity CertTESOL — awarded by Trinity College London. Widely accepted as equal to CELTA, with a similar length, cost and observed teaching practice.
At a glance
| TEFL / TESOL | CELTA / Trinity CertTESOL | |
|---|---|---|
| Typical length | 120 hours, self-paced | About 4 weeks full-time, or part-time over 2–3 months |
| Typical cost | $150 – $500 | $1,500 – $2,700 |
| Format | Online or blended | In person or online, with live teaching practice |
| Teaching practice | Optional practicum on some courses | Required — at least 6 observed hours |
| Best for | First jobs in Asia, career changers | Language centers, adult & business English, long-term ELT careers |
Costs vary by provider and country.
Which one should you pick?
If you are new to teaching and aiming for public schools or language academies in Korea, Japan, China, or Vietnam, a 120-hour TEFL or TESOL is usually enough. It is affordable, quick, and accepted almost everywhere.
CELTA is worth it if you want higher-paying language center or university roles, or a longer-term career in English language teaching. It requires real observed teaching, which is why employers respect it more. For international schools, you’ll usually need a teaching license or PGCE.
Do you need one at all?
- China — a 120-hour TEFL/TESOL (or two years’ experience) is normally required for a work permit
- Vietnam — a TEFL/TESOL or equivalent teaching qualification is usually required
- South Korea — not required for the E-2 visa, but many public schools and academies prefer it
- Japan — not required for the visa; your degree matters more
Choosing a good course
- At least 120 hours of study
- Accredited by a recognized independent body
- Assignments marked by a qualified tutor, not just automated quizzes
- A teaching practicum, if you have no classroom experience
Whatever you pick, make sure the certificate is accredited and includes at least 120 hours — some visa sponsors will reject shorter courses.