Teach English Abroad: The Complete Expert Guide to TEFL, TESOL and CELTA for Asia and Beyond
A detailed, research based overview of English teaching qualifications, global job markets, salaries, requirements and the top training providers for teachers aiming to build an international career.
Teaching English abroad remains one of the most reliable ways to build an international career, gain cultural experience and access professional opportunities in fast growing education markets. Asia in particular continues to hire thousands of qualified English teachers every year. Schools offer competitive salaries, job stability and clear requirements that motivated teachers can meet with the right training.
This expert guide explains the full landscape of TEFL, TESOL and CELTA qualifications, how they differ, which employers prefer, what salaries look like across the most active Asian countries, and the most reputable global and UK course providers. If you want a clear, strategic route into teaching abroad, this article has everything you need to make informed decisions.
Understanding TEFL, TESOL, TESL and CELTA
The English language teaching field uses several related terms. Knowing the differences helps you choose the right course.
TEFL – Teaching English as a Foreign Language. This focuses on teaching English to learners in non English speaking countries such as Vietnam or Thailand.
TESOL – Teaching English to Speakers of Other Languages. A broader term that covers teaching English both overseas and in English speaking countries. Many organisations use TEFL and TESOL interchangeably.
TESL – Teaching English as a Second Language. This usually applies to learners already living in English speaking countries who must develop English skills for study or work.
CELTA – A highly respected Cambridge English qualification that focuses on professional adult teaching. Many language schools worldwide recognise CELTA as a benchmark.
Although several labels exist, the key distinction is between externally moderated, reputable qualifications and short, unregulated courses. The next sections break these down clearly.
The Four Main Types of English Teaching Courses
Course Comparison Table
| Course Type | Typical Hours | Teaching Practice | Duration | Approx Fee Range | Recognition Level | Best For | Notes |
|---|---|---|---|---|---|---|---|
| CELTA | 120+ | Yes | 4 to 5 weeks full time or 12+ weeks part time | £1,400 to £1,800 | Very high | Adult teaching, top schools | Cambridge moderated |
| Trinity CertTESOL | 130+ | Yes | 4 to 5 weeks full time or extended part time | £1,200 to £1,700 | Very high | Professional teaching roles | Externally moderated |
| Level 5 TEFL Diploma | 168 to 180 | Optional | 8 to 16 weeks online (self paced) | £300 to £500 | High | Online study, flexible entry | Ofqual regulated |
| 120 Hour TEFL | 120 | No | 2 to 6 weeks online | £120 to £250 | Moderate | Entry level roles | Common requirement |
| Specialist TEFL Add Ons | 30 to 60 | No | 1 to 3 weeks | £50 to £150 | Varies | Niche teaching (business, young learners) | Enhances CV |
| Course Type | Typical Hours | Teaching Practice | Recognition Level | Best For | Notes |
|---|---|---|---|---|---|
| CELTA | 120+ | Yes | Very high | Adult teaching, top schools | Cambridge moderated |
| Trinity CertTESOL | 130+ | Yes | Very high | Professional teaching roles | Externally moderated |
| Level 5 TEFL Diploma | 168 to 180 | Optional | High | Online study, flexible entry | Ofqual regulated |
| 120 Hour TEFL | 120 | No | Moderate | Entry level roles | Common requirement |
| Specialist TEFL Add Ons | 30 to 60 | No | Varies | Niche teaching (business, young learners) | Enhances CV |
1. CELTA
CELTA is known for its strong reputation and practical teaching focus. It includes real classroom practice supervised by trained instructors. This makes it valuable for teachers who want professional roles, especially in schools that teach adults.
CELTA suits graduates and career changers who want a recognised qualification that improves job prospects in higher paying markets.
2. Trinity CertTESOL
Trinity College London offers a qualification similar to CELTA. It is externally moderated and includes supervised teaching practice. Many reputable schools treat CertTESOL as equivalent to CELTA. It is a strong choice for those who want serious training options in the UK or abroad.
3. Level 5 TEFL Diplomas
Level 5 TEFL Diplomas are intensive online or blended courses, typically around 168 to 180 hours. They sit at the same qualification level as CELTA within the UK system. They do not always include observed teaching practice, but they offer flexibility and are accepted by many schools in Asia.
These courses suit people who want a high quality online program and those who already have teaching experience but need an internationally recognised TEFL credential.
4. Standard 120 Hour TEFL Certificates
A 120 hour TEFL is the basic standard required by many language schools. These courses focus on practical classroom teaching, grammar, lesson planning and student management.
This option suits teachers who plan to work mainly with young learners or those who already have degrees or teaching backgrounds and need TEFL only for visa or HR requirements.
What Employers in Asia Look For
While course choice matters, employers consider a combination of factors. These include:
- A bachelor degree in any subject. Some countries prefer education or English related degrees.
- A recognised TEFL, TESOL, Level 5 or CELTA qualification.
- A clean criminal background check.
- High English proficiency, often native or near native.
- Professional attitude, reliability and willingness to adapt.
- Experience with children or adults. Even one year of school teaching at home is a major advantage.
Some roles require only a basic TEFL and a degree. Others, especially in Japan, South Korea and international schools, prefer CELTA, CertTESOL or teaching degrees with classroom experience.
Demand and Salaries Across Asia
Country Comparison Table
| Country | Typical Salary Range | Degree Required | TEFL Required | Preferred Qualifications | Notes |
|---|---|---|---|---|---|
| Vietnam | $1,000 to $2,000 per month | Yes | Yes | Level 5 or CELTA | Strong demand, good savings |
| Thailand | $900 to $1,600 per month | Yes | Yes | 120 hour TEFL | Popular for lifestyle |
| Cambodia | $800 to $1,300 per month | Often no | Yes | Level 5 or 120 hour | Flexible hiring |
| Taiwan | $2,000 to $2,300 per month | Yes | Yes | Degree plus TEFL | Good support for teachers |
| Japan | $1,600 to $4,100 per month | Yes | Yes | CELTA or Level 5 | Competitive, structured hiring |
| South Korea | $1,600 to $2,000 per month plus housing | Yes | Yes | Degree plus TEFL | High savings potential |
Asia remains the strongest region for English teaching jobs. Salaries vary by country and school type.
Vietnam
Vietnam offers one of the most active TEFL job markets. Teachers earn roughly between one thousand and two thousand US dollars per month. Experienced teachers and those working in premium language centers may earn more. The cost of living is low which allows comfortable savings.
Thailand
Thailand offers attractive work and lifestyle options. Entry level teachers often earn around one thousand US dollars per month. Private schools and international programs pay higher. Thailand is popular among new teachers for its friendly environment and travel opportunities.
Cambodia
Cambodia has a fast growing TEFL market and a simpler hiring process. Teachers often earn eight hundred to thirteen hundred US dollars per month in language centers. International school roles pay more. Cambodia is known for lower barriers and opportunities for teachers over forty and non native speakers who have strong qualifications.
Taiwan
Taiwan offers salaries from about two thousand to two thousand two hundred US dollars per month. Schools often provide support with accommodation and settling in. Taiwan is known for good savings potential and a safe, modern environment.
Japan
Japan remains one of the most established English teaching markets. Monthly pay can range from one thousand five hundred to over four thousand US dollars depending on whether the teacher works in eikaiwa schools, public schools or universities. The demand for English remains strong, especially through major recruitment programs.
South Korea
South Korea consistently offers some of the best salary and benefit packages. Teachers typically earn between one thousand six hundred and two thousand US dollars per month with free housing, airfare and bonuses. Savings can be high due to included benefits.
Top Global TEFL, TESOL and CELTA Course Providers
These providers are respected internationally and offer strong training, accreditation and student support.
- International House – Known for CELTA and teacher training excellence.
- St Giles International – Offers CELTA and advanced English teaching qualifications.
- British Council Partner Schools – Well regarded globally for English training.
- TEFL Org – Offers Level 5 Diplomas and 120 hour TEFL courses with strong accreditation.
- The TEFL Academy – Provides Level 5 Diplomas and specialist modules.
Top UK Based TEFL, TESOL and CELTA Course Providers
These training centers are known for strong delivery and employer recognition.
- International House London – Leading CELTA and TESOL training center.
- St Giles London Central – Offers CELTA with excellent trainer support.
- Cambridge English Approved FE Colleges – Various UK colleges deliver CELTA with Cambridge moderation.
- Trinity College Validated Centers – Offer CertTESOL with external moderation.
- TEFL Org UK – Well respected for Level 5 and TEFL programs with flexible study options.
How to Choose the Right Course
Consider your goals, budget and target country. CELTA and CertTESOL are ideal for serious adult teaching roles. Level 5 TEFL suits those wanting a comprehensive online course. A 120 hour TEFL can be enough for many language center roles, especially if you already hold a degree in education or have classroom experience.
Check visa rules and employer expectations in your chosen country, and choose a course that satisfies both. Make sure the training is accredited, includes tutor support and offers job guidance.
Disclaimer
Information in this guide is based on public research, industry reports and typical hiring trends. Salaries, requirements, job conditions and course acceptance vary by school, region and year. This guide does not guarantee employment or outcomes and should not be considered professional, legal or immigration advice. Always verify current requirements with official course providers, embassies and employers.
Final Thoughts
Asia remains one of the strongest regions for English teaching careers. With the right qualification and a clear plan, you can access well paid positions in Vietnam, Thailand, Japan, South Korea, Cambodia and Taiwan. Your course choice influences your job options, but your degree, experience and professional attitude matter just as much.
Investing in a recognised TEFL, TESOL or CELTA qualification is a practical step toward a long term international career with meaningful impact in education.
