International School Bangkok (ISB)
฿924K – ฿1.46M
Including Admission Fees and Annual Tuition
American, IB
Curriculum
AP, AP Capstone Diploma...
3–18
Age Range
Kindergarten → High School
English
Language
1,802
Students
60 nationalities
73% foreigners
At a glance
ISB has been Bangkok's benchmark American school since 1951, Thailand's first international school, non-profit, and still widely placed alongside NIST and Patana at the top of the city's tier-one group. The campus in Nichada Thani, Pak Kret is the largest single-campus school in Asia: spacious, green, and self-contained in a way that no inner-city campus can replicate. It runs a rigorous US curriculum with IB Diploma and AP Capstone options, and the community is predominantly American and multinational corporate. The variable that every family has to resolve before anything else is location. Nichada Thani is northwest of the city, well outside the Sukhumvit and Sathorn corridors where most corporate expats land. From central Bangkok, expect 45-75 minutes by car in peak traffic. Many ISB families solve this by living within the Nichada Thani gated community itself. If that works for your situation or if you work in the northern Bangkok or Nonthaburi corridor, ISB makes complete sense. If it doesn't, the commute will define your family's daily life.
ISB Fees
Admission & Enrollment
฿264,700
one-time fees
Annual Tuition
฿659,000 – ฿1,197,000
depends on year group
Total 1st year
Including Admission Fees and Annual Tuition
฿923,700 – ฿1,461,700
Admission & Enrollment
฿264,700
one-time fees
Annual Tuition
฿659,000 – ฿1,197,000
depends on year group
Total 1st year
฿923,700 – ฿1,461,700
Including Admission Fees and Annual Tuition
Tuition fees (2026–2027)
On this page
Key Facts
American, IB
Curriculum
English
Language
1,802
Students
60+
Nationalities
73%
Foreigners
07:35 – 14:50
School Day
18
Avg. Class Size
22
Max Class Size
1:9
Teacher / Student
1951
Founded
Everything parents need to know about ISB
Founded in 1951 on the grounds of the U.S. Embassy, International School Bangkok (ISB) is Thailand's oldest and most established American-curriculum international school, operating today as an independent, not-for-profit institution on a purpose-built 37-acre campus in Nichada Thani, Pak Kret, Nonthaburi, roughly 30 minutes north of central Bangkok.
ISB draws its identity from a deeply American educational philosophy blended with IB and AP frameworks, offering genuine curriculum flexibility rare among Bangkok's top-tier schools. At the high school level, students choose between the IB Diploma, an AP Capstone Diploma, a Signature ISB Diploma, or hybrid combinations, making ISB particularly well suited to families uncertain about which exit qualification their child will need.
The non-profit structure means tuition income is almost entirely reinvested into staffing and facilities, with the school publicly reporting that 80 to 85 percent of tuition revenue is allocated to teacher salaries and benefits. The school's Early Childhood division (Pre-K 1 and Pre-K 2) is Reggio Emilia-inspired with strong play-based and inquiry elements, while Elementary School continues with an inquiry-centered, child-led philosophy. Middle and High School lean toward structured inquiry and critical thinking within the American standards-based framework.
Class sizes are small by Bangkok standards for an institution of this scale, and a published school-wide student-teacher ratio of 9:1 reflects the breadth of specialist and support staff on campus. The Learning Support team includes certified special educators, Speech-Language Pathologists, School Psychologists, and an Occupational Therapist, with tiered provision from co-teaching and pull-out support through to the Elementary Intensive Needs program for students with intellectual or developmental disabilities. EAL support is included in tuition, with a minimum English proficiency threshold applied from Grade 5 upward.
ISB is also the birthplace of the MARIO Framework, an internationally recognized learning support methodology now used in over 30 schools worldwide. ISB is best suited to families on extended international assignments or long-term Bangkok residents who want a well-resourced, American-style education with strong university placement outcomes.
The campus is exceptional: 5 gymnasiums, an Olympic-size pool, a 400-meter IAAF athletics track, 12 tennis courts, rock climbing wall, and an off-site 15-acre Environmental Wilderness Campus in Phetchaburi. The main practical trade-off is location; Nichada Thani is a gated compound well outside the city, and families living in Sukhumvit or Sathorn should expect 45 to 75 minutes of daily commute each way. There is no BTS or MRT access. Fees are among Bangkok's highest, and Thai-passport-only applicants follow a fixed, competitive annual intake rather than rolling admissions. Best for families seeking a flagship American/IB school with proven university results and long-term roots in Bangkok, who can commit to the Nonthaburi location.
Facilities
Accreditations & Memberships
ISB Fees
Admission & Enrollment
฿264,700
one-time fees
Annual Tuition
฿659,000 – ฿1,197,000
depends on year group
Total 1st year
Including Admission Fees and Annual Tuition
฿923,700 – ฿1,461,700
Admission & Enrollment
฿264,700
one-time fees
Annual Tuition
฿659,000 – ฿1,197,000
depends on year group
Total 1st year
฿923,700 – ฿1,461,700
Including Admission Fees and Annual Tuition
Tuition fees (2026–2027)
Key Facts
American, IB
Curriculum
English
Language
1,802
Students
60+
Nationalities
73%
Foreigners
07:35 – 14:50
School Day
18
Avg. Class Size
22
Max Class Size
1:9
Teacher / Student
1951
Founded
Everything parents need to know about ISB
Founded in 1951 on the grounds of the U.S. Embassy, International School Bangkok (ISB) is Thailand's oldest and most established American-curriculum international school, operating today as an independent, not-for-profit institution on a purpose-built 37-acre campus in Nichada Thani, Pak Kret, Nonthaburi, roughly 30 minutes north of central Bangkok.
ISB draws its identity from a deeply American educational philosophy blended with IB and AP frameworks, offering genuine curriculum flexibility rare among Bangkok's top-tier schools. At the high school level, students choose between the IB Diploma, an AP Capstone Diploma, a Signature ISB Diploma, or hybrid combinations, making ISB particularly well suited to families uncertain about which exit qualification their child will need.
The non-profit structure means tuition income is almost entirely reinvested into staffing and facilities, with the school publicly reporting that 80 to 85 percent of tuition revenue is allocated to teacher salaries and benefits. The school's Early Childhood division (Pre-K 1 and Pre-K 2) is Reggio Emilia-inspired with strong play-based and inquiry elements, while Elementary School continues with an inquiry-centered, child-led philosophy. Middle and High School lean toward structured inquiry and critical thinking within the American standards-based framework.
Class sizes are small by Bangkok standards for an institution of this scale, and a published school-wide student-teacher ratio of 9:1 reflects the breadth of specialist and support staff on campus. The Learning Support team includes certified special educators, Speech-Language Pathologists, School Psychologists, and an Occupational Therapist, with tiered provision from co-teaching and pull-out support through to the Elementary Intensive Needs program for students with intellectual or developmental disabilities. EAL support is included in tuition, with a minimum English proficiency threshold applied from Grade 5 upward.
ISB is also the birthplace of the MARIO Framework, an internationally recognized learning support methodology now used in over 30 schools worldwide. ISB is best suited to families on extended international assignments or long-term Bangkok residents who want a well-resourced, American-style education with strong university placement outcomes.
The campus is exceptional: 5 gymnasiums, an Olympic-size pool, a 400-meter IAAF athletics track, 12 tennis courts, rock climbing wall, and an off-site 15-acre Environmental Wilderness Campus in Phetchaburi. The main practical trade-off is location; Nichada Thani is a gated compound well outside the city, and families living in Sukhumvit or Sathorn should expect 45 to 75 minutes of daily commute each way. There is no BTS or MRT access. Fees are among Bangkok's highest, and Thai-passport-only applicants follow a fixed, competitive annual intake rather than rolling admissions. Best for families seeking a flagship American/IB school with proven university results and long-term roots in Bangkok, who can commit to the Nonthaburi location.