International School of Bangkok

What International School of Bangkok does

International School of Bangkok (ISB) is an independent, not-for-profit K-12 international school founded in 1951 on the grounds of the U.S. Embassy in Bangkok, currently operating from a 37-acre purpose-built campus in Nichada Thani, Nonthaburi, plus an Environmental Wilderness Campus in Phetchaburi Province. The school enrolls approximately 1,700 students across Pre-K through Grade 12, representing 60+ nationalities, and delivers an American-accredited curriculum augmented by International Baccalaureate (IB) Diploma, Advanced Placement (AP), and ISB Diploma pathways. Class sizes range from 12 in Pre-K1 to 22 in upper elementary, supported by a 9:1 student-teacher ratio and approximately 501-1,000 employees.

ISB's revenue is generated almost entirely from tuition and fees on a subscription basis, with annual tuition ranging from 659,000 baht (Pre-K) to 1,197,000 baht (Grade 12) and a 260,000 baht non-refundable registration fee; 80-85% of tuition income is reinvested in salaries and benefits as a not-for-profit institution. Ancillary revenue streams include distance-tiered transportation services (111,300-178,000 baht/year), the Life Centered Education add-on (980,000 baht/year), and a 156 million baht annual capital projects program supporting a 7-year facilities master plan, including a 20 million baht positive-pressure air filtration system. The school's go-to-market is direct-to-consumer via campus tours, virtual tours, admissions webinars, and the OpenApply online portal, with four distinct admissions streams (Thai, Dual/Expat rolling, ED Visa semester-based) and formal referral partnerships with three global relocation firms (Asian Tigers Mobility, Pacific Orientation Relocation, Santa Fe).

The school's competitive positioning rests on multi-jurisdictional accreditations (WASC, IB, CIS, EARCOS, ISAT, IASAS, Keeping Children Safe), 75+ years of operating heritage, embedded location within the Nichada Thani gated community, and consistent university placement outcomes (IB Diploma average score of 34 vs global 30.58). Technology infrastructure is limited to operational tools (PowerSchool, Canvas, OpenApply, AirGradient, International SOS) rather than proprietary learning platforms, and there is no disclosed AI/ML capability. Governance is by a parent-elected volunteer Board of Trustees chaired by Andy Richter, with Debi Caskey serving as Acting Head of School.

Name

International School of Bangkok

Legal name

International School Bangkok

Website

https://isb.ac.th

Company type

Private

Founded year

1951

Operating status

Operating

Headcount range

501–1,000 employees

Short description

International School of Bangkok is an independent, not-for-profit K-12 international school founded in 1951, serving approximately 1,700 students from 60+ nationalities through American, IB, and AP curricula at its Nichada Thani campus in Nonthaburi, Thailand.

Ownership category

akta.pro rank

Product category

International K-12 Education

NAICS

Elementary and Secondary Schools (611110)

SIC

Services-Educational Services (8200)

akta.pro primary industry

International/Global Curriculum Schools (IB, Cambridge, etc.) (EDAJABAG)

Keywords

• International education
• K-12 schooling
• IB diploma program
• University preparation
• Expatriate student services

Headquarters

HQ city

Pak Kret

HQ country

Thailand

HQ region

Asia

Offices2 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Supply Chain

Revenue model

1. Tuition and Fees: As a not-for-profit independent school, ISB reinvests all income into the school. 80-85% of tuition income is allocated to salaries and benefits. Revenue comes from tuition fees across multiple programs (Pre-K through Grade 12), application processing fees, registration fees, annual fees, transportation fees, and ISA membership fees.
2. Transportation Services: Door-to-door transportation service provided by Montri Transportation Company for students up to 50 kilometers away, with fees based on distance from campus.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

ISB is a not-for-profit international school offering a comprehensive Pre-Kindergarten through Grade 12 education built on an American-accredited curriculum with IB Diploma and Advanced Placement pathways. The school serves approximately 1,700 students from over 60 nationalities on a 37-acre purpose-built campus in Nichada Thani, Nonthaburi, near Bangkok. Supplementary offerings include a Summer School, the Environmental Wilderness Campus for outdoor education, English as an Additional Language support, and a Life Centered Education program for students with intensive learning needs.

Product overview

International School Bangkok (ISB) is Thailand's premier international school offering a comprehensive PK-12 educational program built on an American-accredited curriculum with globally recognized IB and AP pathways. The school operates as a unified platform combining Early Childhood, Elementary School (KG-5), Middle School (6-8), and High School (9-12) programs within a single world-class campus. Key modules include the IB Diploma Program, AP courses, and ISB Diploma as alternative pathways, supported by the Environmental Wilderness Campus for outdoor education. The school provides specialized support through EAL, Learning Support, Life Centered Education (LCE), and University Counseling services. Additional offerings include Summer School, athletics programs, arts programs, and over 100 extracurricular activities collectively referred to as Panther Activities and Panther Sports.

Differentiator

Problem solved

Functional benefit

Products and services

• Early Childhood / Pre-Kindergarten Program
• Elementary School Program (Kindergarten to Grade 5)
• Middle School Program (Grades 6-8)
• High School Program (Grades 9-12) Comprehensive high school with multiple pathways including IB Diploma, AP courses, ISB Diploma, and hybrid pathways, preparing students for university success.
• International Baccalaureate (IB) Diploma Program Rigorous, globally-recognized IB curriculum offered in high school with strong results (average score 34 points, 16% scoring 40+ points). 34% of students earn the IB Bilingual Diploma.
• Advanced Placement (AP) Program College-level AP courses offered with 11 new courses added recently; 28.5% of eligible students take at least 1 AP exam, with 277 exams completed in the recent year.
• Summer School Program Summer school offerings for students during school breaks, with Summer School 2026 listed as a popular offering.
• Life Centered Education (LCE) Program Specialized program for students with intensive learning needs providing additional support alongside the regular curriculum, at 980,000 baht per annum on top of regular tuition.
• English as an Additional Language (EAL) Support Language support program for students not yet proficient in English, with limited availability per grade level.
• Environmental Wilderness Campus (EWC) Outdoor Education Wilderness campus in Petchaburi Province providing gold standard sustainability-focused outdoor education programs while enhancing environmental stewardship.

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature2 records

Partnerships

Eight partnerships are on record, tiered core and supporting.

• Montri Transportation CompanycoreOthersTransportation provider serving ISB since 1976, offering door-to-door service for students up to 50 kilometers away. Service operates before and after school with adult monitors and air-conditioned vehicles.
• Asian Tigers Mobility (Thailand) Ltd.supportingOthersInternational moving and relocation services company providing support for globally mobile families relocating to Bangkok for ISB enrollment.
• Pacific Orientation RelocationsupportingOthersRelocation services provider specializing in supporting expat families moving to Bangkok and enrolling children at ISB.
• Santa Fe (Thailand) Co., Ltd.supportingOthersGlobal relocation company providing moving and logistics services for families relocating to Thailand for ISB enrollment.
• Nichada Thani CommunitycoreStrategic or Co-development PartnerGated residential community where ISB campus is located. Provides secure living environment with 24-hour monitored roads, green spaces, and family-friendly amenities. Many families live within the community for convenient school access.
• International SOSsupportingOthersMedical emergency response partnership providing emergency call center access 24/7 for emergency situations on or off campus, and medical emergency response plans for all school trips.
• AirGradientsupportingTechnology or IntegrationAir quality monitoring technology provider supplying calibrated air quality monitors for PM2.5, humidity, and temperature readings displayed in real-time on campus.
• Syracuse UniversitysupportingStrategic or Co-development PartnerPioneering partnership enabling ISB high school students to earn real college credit while still in high school through university coursework.

Scale indicators8 records

Recent moves10 records

Expansion highlights5 records

Broad incumbents

• Singapore American School: Large, established American-curriculum international school in Singapore that serves as a regional comparable for ISB in terms of scale (1,700+ students), American curriculum offering, IB/AP pathways, and premium positioning to expatriate families.

Direct peers

• Harrow International School Bangkok: Premium British-curriculum boarding/day school in Bangkok competing for high-income expatriate and Thai families seeking a global secondary education brand.
• Bangkok Patana School: Bangkok's largest British-international school and the most direct competitor to ISB, serving a similar expatriate and Thai family base with a comparable premium tuition structure, full K-12 offering, and parallel IB/British curriculum pathways.
• NIST International School: Another leading Bangkok international school offering IB curriculum PK-12, targeting the same expatriate and Thai family segments with comparable tuition levels and accreditation footprint (CIS, IB, WASC-equivalent).
• American School of Bangkok: Bangkok American-curriculum school with multiple campuses offering comparable PK-12 pathways, AP programs, and an English-language instructional model aligned with ISB's core offering.
• KIS International School Bangkok: Premium IB-focused international school in central Bangkok with K-12 IB continuum, occupying the same high-tuition, expat/Thai family niche that ISB serves.
• Shrewsbury International School Bangkok: British-curriculum premium international school in central Bangkok competing head-to-head with ISB for expatriate and affluent Thai families, offering K-13 IGCSE/A-Level pathways with similar facility and co-curricular investment.

Regional players

• Jakarta Intercultural School: Leading American/international school in Jakarta operating at similar scale and serving comparable expatriate/diplomatic family bases across Southeast Asia; useful regional benchmark for ISB's premium positioning strategy.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/ISBangkok
• YouTubeyoutube.com/channel/UCbchhy_Ev16AETktkCqxv4Q
• Facebookfacebook.com/ISBInternationalSchoolBangkok
• LinkedInlinkedin.com/school/international-school-bangkok-isb-
• Instagraminstagram.com/isbangkok/?hl=en

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about International School of Bangkok