Method
Methodology & data sources
How CredRadar counts schools, where every figure comes from, and how to correct us. Data compiled and checked 2026-10-06.
Counting
Why the totals differ
There is no single official number of "international schools in Thailand" — each register counts something different. We publish our reconciliation instead of picking the biggest number.
| 249 | Licensed international schools (Thai MOE/OPEC, 2024), as cited in SISB equity research using ministry data. The current full OPEC register is not public — the public copy dates from June 2016 (166 schools). |
|---|---|
| 207 | Entries in the ISAT (International Schools Association of Thailand) member directory, counted live on 2026-10-06. Counted per campus and includes standalone kindergartens. |
| 199 | Listings in the International Schools Database (third-party aggregator) for Thailand. |
| 180+ | Premium English-medium schools in ISC Research's count (via WhichSchoolAdvisor), with 60,000+ students — a narrower definition than licensing. |
| 180 | School/campus records in CredRadar's master dataset (main table), each with region, grades, curriculum, accreditation notes and a source-labelled fee or an explicit "not verified" flag. |
| 176 | Listings published on this site. 4 dataset rows are editorial notes inside the master table (cross-references and "no school found" records), not schools, so they are not published as listings. A further register of kindergarten-only schools is held in the dataset as names only and will be published separately. |
| Audit | In October 2026 we cross-checked our Bangkok Metropolitan coverage against the International Schools Database's Bangkok list (104 entries) and the ISAT directory: 22 schools were added or split out into their own verified rows, and published-fee data was completed for 3 more existing rows. Names that could not be verified in two independent sources were deliberately left out rather than padded in. |
Labels
Fee source labels
| [O] Official | The figure was captured from the school's own website or official fee PDF in our 2026-10-06 pass. |
|---|---|
| [A] Aggregator | The figure comes from a third-party aggregator (International Schools Database, Edarabia, WhichSchoolAdvisor, Prestige). Useful for comparison — never quote it to a school as its own published fee without checking the school's current document. |
| [NV] Not verified | No reliable public figure could be verified (fees not published, enquiry-only, not yet announced, or a found figure was discarded as unreliable). We show this label rather than a guessed number. |
In our 2026-10-06 pass, roughly one third of schools publish a complete fee table, one third publish partial or "from" prices, and one third require an enquiry. Of the listings on this site, 108 carry [O] official fees.
Process
Verification process
Collect
Registers (ISAT, MOE/OPEC via research), school websites and fee PDFs, IB/CIS/WASC/NEASC directories, and reputable aggregators as a cross-check only.
Label
Every fee keeps its source label and the raw published wording, so a reader can audit any figure back to its origin.
Correct
Aggregator errors are discarded, not averaged. Where an aggregator shows only an outdated single "average" for a school, we replace it with the per-grade range for the current academic year or mark the school [NV] — we never blend the two. Every correction is noted on the school page itself, with the date it was made.
Corrections
Corrections policy & limits
Schools and parents can submit corrections via the claim form; verified corrections are published with a note on the school page. Known limits of the current dataset: enrolment and student–teacher ratios are published by fewer than 20% of schools and are left blank elsewhere; Chinese school names are not systematically published and are not invented; a small number of schools in the 2016 OPEC register could not be confirmed as still operating and are flagged rather than silently dropped. Fees change annually (typically +3–5%): always confirm the current schedule with the school.