This comparison cannot be a price ranking yet. SISB Rayong publishes a trilingual international route from age two and dated 2026/27 tuition of ฿401,700–฿789,300. Satit Udomseuksa serves Nursery through Secondary 6 on Thailand's national curriculum with separate Thai and English Programme tracks, but publishes no current tariff. Obtain a dated complete quote before comparing cost.
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Both schools publish provision from the early years through secondary, but they are not interchangeable. SISB follows an international Singapore-to-Cambridge sequence. Satit Udomseuksa follows Thailand's Basic Education Core Curriculum with separate Thai and English Programme tracks and describes itself as bilingual rather than international.
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| Dimension | SISB Rayong | Satit Udomseuksa School |
|---|---|---|
| School | Singapore International School Rayong | Satit Udomseuksa School |
| Age span | Ages 2–18; 2026/27 new applications Nursery 1–Grade 10 | Nursery through Secondary 6 |
| Curriculum | EYFS, Singapore Primary, Singapore/UK hybrid Grades 7–8, Cambridge IGCSE and AS/A-Level | Thai Basic Education Core Curriculum B.E. 2551, with Thai and English Programme tracks |
| Published tuition | Dated 2026/27: Nursery ฿401,700; Kindergarten ฿429,600; Primary ฿470,700–฿567,300; Grades 7–10 ฿609,300–฿650,700; Grades 11–12 ฿789,300. | Fees on application. The official site publishes no current dated tuition schedule. |
| Named extras | Application ฿5,000; assessment ฿5,000; enrolment ฿220,000; deposit ฿50,000; resources, meals and ELS separate. | No current public tariff for application, enrolment, deposits, meals, bus, uniforms, books, examinations, activities or other extras. |
| Planning point | Fees reach Grade 12, but 2026/27 new applications stop at Grade 10. | Obtain a dated grade-and-programme-specific quote and verify subject languages, Thai credentials and transfer evidence. |
| Sources | campus overview · 2026/27 fees | school site · programmes · school classification · 2026 OPEC evidence |
| Live editorial | Read the SISB Rayong editorial | Read the Satit Udomseuksa editorial |
Satit publishes no current fee figures. Request SISB’s grade, entry, resources, meals, ELS and transport rows alongside a dated Satit quote naming programme, tuition, entry charges, meals, books, transport, insurance, uniforms, activities, examinations, support and refund terms.
SISB publishes dated 2026/27 tuition of ฿401,700–฿789,300. Satit publishes no current tuition or extras tariff, so its cost remains fees on application.
SISB moves from EYFS and Singapore Primary into Cambridge IGCSE and AS/A-Level. Satit follows Thailand's core curriculum with separate Thai and English Programme tracks.
SISB’s tariff reaches Grade 12 while 2026/27 new applications stop at Grade 10. Satit families need a dated complete quote plus written evidence of subject languages, examinations and final Thai credentials.
The schools overlap from kindergarten through secondary, yet lead toward different records of learning. SISB combines English, Thai and Mandarin with Singapore and Cambridge stages; Satit Udomseuksa combines Thai and English within Thailand's national curriculum.
Ask both schools to state the child’s proposed class, start date, age cut-off and following year. SISB publishes Nursery through Grade 12 fee rows, though 2026/27 new applications stop at Grade 10. Satit describes Nursery through Secondary 6.
Do not translate Grade, Year, Primary and Secondary labels by number alone. Request the placement test, class equivalence, calendar and written progression route, particularly if a child may move between an international system and the Thai system later.
SISB records English, Thai and Mandarin. Ask for weekly allocation, subject language, newcomer support and the transition from Singapore stages into Cambridge qualifications.
Satit Udomseuksa records Thai and English. Ask which subjects are taught in each language at the proposed stage, how English proficiency is assessed, what Thai literacy level is expected and how newcomers receive support.
At both visits, request anonymised work and the report format in each teaching language. Observe how teachers explain unfamiliar tasks and whether translation supports learning or merely task completion.
SISB’s 2026/27 tuition runs from ฿401,700 to ฿789,300. Application and assessment are ฿5,000 each, enrolment ฿220,000 and deposit ฿50,000. Resources are ฿30,500–฿84,000, meals ฿26,400–฿39,000 and ELS ฿20,000–฿30,000 per term.
Satit has no current public tuition, entry or extras schedule in the ledger. Do not carry an old price into this comparison or infer one from another bilingual school.
Ask Satit for a dated offer naming the child, grade, Thai or English Programme, academic year, tuition, application or registration, deposit, meals, books, transport, insurance, uniforms, activities, examinations and support. A Satit total remains unknown until every compulsory row is written.
SISB publishes Cambridge IGCSE and AS/A-Level after its Singapore stages. Confirm which senior grades currently operate, accept newcomers and offer each subject at the Rayong campus.
Satit describes Nursery through Secondary 6 under Thailand's national curriculum, with Thai and English Programme tracks. Ask which final Thai credential and transcript pupils receive, which subjects use English in the selected track and what language evidence is supplied for applications outside Thailand.
Rehearse relocation after two years. Request the transcript, curriculum map, language evidence, grading scale and teacher references each school would supply.
SISB publishes ELS at ฿20,000–฿30,000 per term. Satit Udomseuksa does not publish a usable language- or learning-support tariff in the current ledger.
If support matters, request the staff member, group size, minutes per week, review date, progress measure, exit criteria and price. Separate English acquisition from other learning needs.
Bring existing reports before assessment and ask admissions to state any limitations in writing.
SISB’s published sequence reaches Cambridge IGCSE and AS/A-Level, but the Rayong campus opened in 2023 and its 2026/27 new-applicant range stops at Grade 10. Ask which secondary grades are operating now, how many pupils are in each cohort, which IGCSE subjects are taught and when the first Rayong AS/A-Level cohort is expected.
Satit describes secondary through Secondary 6. Ask which upper-secondary tracks run now, which subjects are taught in English, which Thai national examinations apply and what university-counselling evidence the current cohort receives.
For either school, request anonymised subject-choice forms, a sample transcript, the examination calendar and the university-counselling timeline.
Satit is named in a current 2026 Office of the Private Education Commission document. That supports a Thai private-school record but does not independently verify the school's own ONESQA wording. SISB’s current ledger record does not list a campus-level accreditation.
Ask each school for campus-specific register or examination evidence, then compare teacher qualifications, class size, homework and reporting cadence. Keep regulatory registration separate from curriculum and qualification claims.
SISB publishes a 2% full-year tuition discount, sibling tuition discounts of 5% for the second child and 10% for later children, and a 20% enrolment reduction from the second child. The current Satit ledger records no usable standard fee or discount tariff.
Ask Satit to state the standard price first and any concession separately. A percentage discount has no decision value without its base, duration and conditions.
SISB is in Nong Taphan, Ban Khai; Satit Udomseuksa is in Nong Prue. Drive both routes at arrival and collection times, including work and sibling stops.
Neither ledger record supplies a comparable transport quote for the family address. Ask whether a route is available, then request pickup windows, vehicle time, supervision and the exact address price. Both schools are day-only.
Save offers, fee schedules, calendars and placement answers together.
Arrive before the class begins and watch the transition from gate to room. Record how quickly the child separates, who welcomes them, which language adults use and whether the routine is understandable without repeated prompting. Ask what happens on a difficult morning and how parents are informed. A polished tour after children leave cannot answer these questions.
Ask for a starting assessment, mid-year report and anonymised work from the proposed class. At SISB, trace English, Thai and Mandarin into Singapore and Cambridge stages. At Satit Udomseuksa, inspect work in Thai and English and trace how its bilingual programme covers the Thai Ministry learning standards.
Record the balance of adult-led, child-initiated, individual and group activity during the visit. Ask how teachers adapt the same task for a child who is new to English, already reading or reluctant to join a group. The right environment is not defined by one teaching philosophy; it is the setting where staff can explain how this child will participate and progress.
Confirm arrival supervision, meals, allergies, illness procedures, late collection and activities. SISB prices meals and resources separately. Satit Udomseuksa has no current public tariff for meals or transport, so ask whether each service is available and require a written inclusion and price list.
Place both calendars beside the family’s work calendar. Count closures that require alternative care and ask whether holiday programmes are offered, separately registered or guaranteed to enrolled pupils. A school-year tuition comparison does not capture care purchased during long breaks.
SISB is in Nong Taphan, Ban Khai; Satit Udomseuksa is in Nongprue, Banglamung. Verify each entrance, transport route and contract address before payment. Test gate queues, parking and the return journey.
Both schools are day-only in the current ledger. Families requiring residential care should treat that as a non-fit.
For each school, finish the sentence: “This place works if…” Include the quoted total, language routine, classroom fit, support availability, care hours, travel ceiling and next-school plan. Then write the conditions that would trigger a review. This prevents a single attractive feature from hiding an unresolved cost or transition risk.
Run the same exercise for two future dates. At age six, both schools may be usable, but SISB's international primary sequence and Satit Udomseuksa's Thai bilingual primary sequence create different language and transfer demands. At age eleven, compare SISB's growing Cambridge transition with Satit Udomseuksa's Secondary pathway, present subject languages and support needs.
Before signing, compare the two schools’ invoice language line by line. Ask each admissions team to mark every compulsory, optional, refundable and one-time row, then calculate cash due before the first day, the complete first year and a normal later year. Keep every Satit fee row open until a dated signed offer resolves it.
Also rehearse a mid-year move. Ask what notice is required, which reports and curriculum records would be released, how deposits are returned and whether prepaid services are refundable. Families using the Eastern Seaboard industrial corridor should test both routes at real collection time, because a lower fee cannot compensate for an unsustainable daily journey.
Ask how each school handles a mid-year departure before assuming either transfer will happen neatly at the end of a stage. Record required notice, reports supplied, outstanding-fee conditions and whether unused services can be refunded. A family expecting relocation should weight these documented terms alongside teaching and price.
Do not pay while a condition remains material and unanswered. Ask admissions to correct the offer email, retain SISB's 2026/27 schedule and Satit's dated personalised quote, and note who supplied every grade and support answer. That record makes the decision auditable.
No current comparison is possible. SISB publishes a dated 2026/27 schedule, while Satit supplies fees on application and has no current public tariff.
No. SISB combines Singapore and Cambridge stages. Satit follows Thailand's national curriculum with Thai and English Programme tracks and describes itself as bilingual rather than international.
SISB publishes ages 2–18, with 2026/27 new applications through Grade 10. Satit describes Nursery through Secondary 6.
Ask for grade availability, tuition, application, assessment, enrolment, deposit, resources, meals, transport, trips, devices, ELS and refund terms.
Ask for academic year, exact grade and programme, tuition, every entry charge, meals, transport, books, uniform, insurance, activities, examinations, language support and refund terms.
Use the decision framework above to weigh curriculum, fees, continuity, location and your child’s fit.