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Thailand, Bangkok
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Trinity International School is located at 30 Sukhumvit Soi 36, Khlong Tan, Khlong Toei, Bangkok 10110. It sits in the Sukhumvit area, a well-connected part of the city, with Thonglor BTS station at the entrance to Soi 36, making it accessible for families using public transport. The neighbourhood is a mix of residential streets and commercial amenities, offering convenience for commuting parents.
The school offers education from Kindergarten (ages 3+) through Grade 12. This covers early years, elementary, middle school, and high school levels, with age-appropriate curricula for each stage.
TRIS is a co-educational day school. It does not provide boarding facilities.
The school provides Learning Support for students who require extra help, with teachers and support staff working with parents to meet individual needs. Students with limited English proficiency can join the ESL program until they are ready to join mainstream classes.
TRIS follows the American (California) curriculum and is accredited by the Western Association of Schools and Colleges (WASC), a U.S.-based body.
The school is affiliated with the Seventh-day Adventist Church and incorporates values education based on Adventist principles.
The school day runs from 07:30 to 15:00, with student arrival between 06:45 and 07:25. Students begin the day in homeroom with the national anthem, attendance, and announcements, and have scheduled breaks and a lunch period during the day.
TRIS operates its own van service for transporting students to and from school.
Application & Placement Test Fee: THB 4,000 (one-time, non-refundable)
One-Time Entry Fees
Enrollment Fee:
K1–K3: THB 80,000
G1–G12: THB 110,000
Development Deposit: Waived until July 31, 2026.
Registration Fee: THB 15,000 for all grades.
Books & Damage Deposit: THB 22,000 (G6–G12 only; refundable if materials are returned in good condition).
Annual Tuition Fees
K1–K3: THB 198,000
G1–5: THB 203,900
G6–8: THB 220,870
G9–12: THB 220,870
Annual Recurring Fees
General Fee: THB 36,045 – THB 39,040 depending on grade
Lunch & Morning Snack: THB 15,550 (K1–K3) to THB 24,400 (G9–12)
Parent/Teacher Association Fee: THB 500
Other Fees
EAL Fee: THB 30,000 per semester (if applicable)
Re-registration Fee: THB 15,000 annually
Uniforms: THB 1,200 – THB 1,700 per set; Pathfinder and PE uniforms also required
PSAT (G10 & G11): THB 1,200
AP Courses (HS): THB 15,000 per subject
School Bus: THB 25,000 – THB 40,000 per semester
Payment Methods
Payments are accepted via bank transfer; confirmation required from the finance office.
Refund Policy
Refunds are provided only for refundable deposits under stated conditions.
Trinity International School (TRIS), established in 2003 and located at 30 Sukhumvit Soi 36 in Bangkok’s residential Sukhumvit district, serves around 450 students aged 3 to 18. The school follows an American Curriculum based on California's Common Core, with the option to pursue Advanced Placement (AP) courses in upper grades. English is the language of instruction, and the school also teaches Thai and Mandarin. TRIS operates a school bus service, enhancing access from nearby neighbourhoods. The school is licensed by the Thai Ministry of Education and accredited by WASC and ONESQA. Notable strengths include emphasis on STEM (including a UC Berkeley partnership), academic enrichment through AP offerings, and a strong orientation toward service, rooted in values education.
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