On this page
For the full picture of senior provision, start with our international schools in Bangkok directory, which lists every school by curriculum and stage. The schools below all run an examined Years 12 to 13 programme that leads directly to university entry, and they admit by application rather than by catchment. This is a shortlist to research, not a ranking, and provision changes, so confirm current pathways with each school.
If you are weighing the qualification itself, our guides to A Levels and the International Baccalaureate explain how each is examined and recognised by universities. The clearest fault line in Bangkok is the post 16 route: some schools finish on the IB Diploma, others on A Levels, and a few of the largest run both, so start by deciding which qualification fits your child.
The shortlist
Bangkok Patana School
Bangkok Patana is the city's original British international school and one of its largest, teaching an enhanced English National Curriculum through IGCSE and then the IB Diploma in the sixth form. Families who want a British school lower down but the breadth of the IB Diploma at the top will find that combination here, and the school's scale supports a wide Diploma subject choice. Read the full Bangkok Patana School profile for curriculum, stages and admissions.
Shrewsbury International School Bangkok
Shrewsbury is one of Bangkok's largest British schools, with a riverside campus, and its sixth form finishes on A Levels rather than the IB Diploma, so students specialise in a focused set of subjects in Years 12 and 13. It is a natural shortlist entry for families who want a wholly British sixth form with A Levels as the leaving qualification. See the Shrewsbury International School Bangkok profile for detail.
NIST International School
NIST is Thailand's first IB World School and runs the full IB continuum from the early years, with the IB Diploma in Years 12 and 13. For families committed to the IB pathway from the start, a continuum school like NIST keeps a child within one philosophy all the way to university entry. The NIST International School profile sets out its programme and admissions.
Harrow International School Bangkok
Harrow Bangkok runs a British curriculum through to Year 13, with A Levels in the sixth form, in the house and pastoral tradition modelled on Harrow School in London, and it offers boarding alongside day places. It suits families who want a traditional British sixth form with A Levels and the option of boarding. Read the Harrow International School Bangkok profile for more.
St Andrews International School Sukhumvit
St Andrews on Sukhumvit teaches a British framework through IGCSE and then the IB Diploma in Years 12 and 13, giving central Bangkok families an IB sixth form within a British style school. Its location suits families living along the Sukhumvit corridor. See the St Andrews International School Sukhumvit profile for curriculum and stages.
Bangkok Prep International School
Bangkok Prep follows the National Curriculum for England with a rigorous IGCSE programme and a wide range of A Levels in Years 12 and 13, making it a strong British option for families who want A Levels in central Bangkok. The Bangkok Prep International School profile covers its programme and admissions.
How we chose
We included only Bangkok schools we could confirm run a genuine, externally examined sixth form leading to university entry, the IB Diploma, A Levels or both, and that enrol students through to Year 13. We did not rank them, score them or attach ratings, because the right sixth form depends on your child's subjects, the qualification universities in your target country prefer, and the fit of the school. Verify current subject lists and pathways directly, as schools add and retire options year to year.
Shortlist Bangkok schools for your child
Tell us your child's stage, curriculum and priorities and the school finder returns a matched Bangkok shortlist.
Start the school finderFees and next steps
Sixth form fees in Bangkok sit at the upper end of each school's fee schedule, and the senior years are typically the most expensive. Rather than quote figures that move each year, we keep the live bands in one place: see our guide to international school fees in Bangkok for current tuition by school and stage, and confirm the exact sixth form figure, plus any examination and deposit costs, with the school before you apply.
To build a shortlist around your child, use the school finder, browse the full Bangkok schools directory, or read the curriculum guides to A Levels and the IB Diploma to settle on a qualification first.
Common questions
Shrewsbury International School Bangkok, Harrow International School Bangkok and Bangkok Prep all teach A Levels through Years 12 and 13 after IGCSE. Subject lists change year to year, so confirm the current options with each school before you apply.
Bangkok Patana School, NIST International School and St Andrews International School Sukhumvit all run the IB Diploma in Years 12 and 13. NIST teaches the full IB continuum from the early years. The IB Diploma is widely recognised by universities worldwide; see our IB curriculum guide for how it is examined.
Neither is universally better. The IB Diploma is broad, with six subjects plus the core, while A Levels let a student specialise in three or four. Universities in different countries express preferences in their entry requirements, so the better choice depends on your child's strengths and target universities. Our curriculum guides compare both in detail.
Sixth form sits at the top of each school's fee scale and is usually the most expensive stage. Figures change annually, so we maintain current tuition by school and stage in our international school fees in Bangkok guide rather than quote a number that dates quickly.
No. Bangkok international schools admit by application, assessment and interview rather than by residential catchment, so where you live does not guarantee a place. Apply directly to each school and check its entry requirements for the sixth form.