California Prep International School (CPIS) is a USA school in Saraburi, Thailand. Founded in 2010. It serves 2,100 students for students aged 3–18. Annual tuition ranges from $2,352 to $2,996 USD.
Explore This School
Location & Getting There
NanaSays Scorecard
Key Details
Scholarships Available
Scholarships are available for academic excellence, students from financially disadvantaged backgrounds, and those with outstanding talent in sports or the arts. Eligibility criteria and selection process are not published publicly; families are encouraged to contact the school directly.
Key facts
Fees & the true cost of attendance
Published fees
$ 2,352–$ 2,996 per year.
Budget beyond the sticker price. Assume the real annual spend is 5–15% higher than the headline fee. Hidden costs typically include: registration fee, acceptance deposit (usually one term's fees, refundable at the end of schooling), uniform + sports kit, trips and expeditions, individual music tuition, exam entry fees, travel to/from home.
Ask the Bursar for a sample "all-in" first-year invoice before committing.
About
California Prep International School (CPIS) is a K-12 international school located in Kaeng Khoi, Saraburi, Thailand, co-founded in 2010 by Dr. Phakdee Mangmiwatthana and Dr. Adelino Libato. The school envisions being recognized as the number one K-12 school in Thailand, offering a balanced and child-centered education with over 2,100 enrolled students and staff of 50+. CPIS draws students from more than 30 countries and has placed graduates in universities across Thailand, the USA, Australia, the UK, Germany, and beyond.
School data verified by NanaSays. Last updated: April 2026.
Why Families Choose
California Prep International School is among Thailand's first fully e-learning international schools, blending in-person teaching with digital learning tools. It follows the California Department of Education curriculum and has offered STEM as a formal subject since 2019. The school prepares upper-secondary students for TOEFL, SAT, and AP exams, providing pathways to international higher education. Located in a quieter semi-rural area of central Thailand, it offers both day and boarding options for a multicultural student body.
University Destinations
Fees & Financials
| Grade / Year | Annual Fee |
|---|---|
| PK-K3 | THB 62,000~$ 1,699 |
| Grade 12 | THB 85,000~$ 2,329 |
| Grade 1-3 | THB 72,000~$ 1,973 |
| Grade 4-5 | THB 75,000~$ 2,055 |
| Grade 6-7 | THB 78,000~$ 2,137 |
| Grade 8-9 | THB 80,000~$ 2,192 |
| Grade 10-11 | THB 83,000~$ 2,274 |
Conversions to USD use exchange rates as of April 2026.
Original currency: THB 84,000 - 107,000. Application fee: $28.
Admissions Process
- 1Complete the official application form (available in English or Thai) and arrange an appointment with the Admissions Office. 2. Prospective students undergo a placement test; an interview is conducted with the student and parents meet with the Admissions Committee. 3. Submit the completed application form with supporting documents (birth certificate, house registration, transcript, medical certificate for Thai students; passport copies, visa/work permit, proof of legal status, and escrow receipt for non-Thai students). 4. Upon acceptance, finalize registration through the Finance Office by paying entrance fees, deposits, and development fees. 5. New students attend an orientation and are paired with a student buddy; Middle and High School students receive e-learning system guidance.
Admissions Details
Boarding Life
Boarding is available from Grade 1 upwards. Options include a weekday-plus-weekend plan (THB 65,000/year + THB 1,000/weekend) for Grades 1–3, a standard boarding plan (THB 60,000/year) for Grades 4–12, and a full seven-day residential option (THB 85,000/year). A refundable security deposit of THB 10,000 is required for boarding students.
Boarding is available from Grade 1 upwards. Grades 1–3: THB 65,000 per year plus THB 1,000 per weekend stay. Grades 4–12: THB 60,000 per year. Full seven-day boarding option: THB 85,000 per year. Foreign boarding students also pay health insurance (THB 14,000/year) and a student visa fee (THB 5,000/year).
Student Life
A one-time uniform fee of THB 4,000 applies. No further detail on requirements by stage is publicly disclosed.
Facilities & Programmes
Wellbeing & Safety
The school does not publicly disclose detailed safeguarding or child protection policies. It holds WASC and ONESQA accreditations, both of which require member schools to meet baseline standards of student welfare and safety.
Student Demographics
Curriculum by Stage
| Stage | Curriculum | Notes |
|---|---|---|
| Kindergarten | American Diploma | — |
| Elementary (Grades 1-5) | American Diploma | — |
| High School (Grades 9-12) | American Diploma | — |
| Middle School (Grades 6-8) | American Diploma | — |
School Background
Founded on November 14, 2010 by Phakdee Mangmiwatthana (Ph.D.), who serves as Licensee, Director, and Co-Founder, and Adelino Libato (Ph.D.), who serves as Co-Board Chairman and Co-Founder. Governed by the school's administration and a board.