This comparison is deliberately not a price ranking. SISB Rayong publishes a trilingual Singapore-to-Cambridge route and 2026/27 tuition of ฿401,700–฿789,300. Rugby publishes a British IGCSE and A-Level route, with tuition of ฿345,000–฿999,000 and boarding from Year 6. Compare exact grades, entry charges, support, boarding and the senior credential.
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Both schools publish dated 2026/27 tuition and separately priced support rows. SISB’s current admissions stop at Grade 10 despite fees through Grade 12; Rugby publishes an established through-school pathway, boarding from Year 6 and direct British Schools Overseas inspection evidence.
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| Dimension | SISB Rayong | Rugby School Thailand |
|---|---|---|
| School | Singapore International School Rayong | Rugby School Thailand |
| Age span | Ages 2–18; 2026/27 new applications Nursery 1–Grade 10 | Ages 2–18; Pre-Nursery through Year 13 |
| Curriculum | EYFS, Singapore Primary, Singapore/UK hybrid Grades 7–8, Cambridge IGCSE and AS/A-Level | British curriculum through IGCSE and A-Level |
| Published tuition | 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. | 2026/27: half-day Pre-Nursery/Nursery ฿345,000; full-day ฿572,000; Reception ฿688,000; Years 1–2 ฿736,000; Years 3–6 ฿765,000–฿788,000; Years 7–8 ฿868,000; Year 9 ฿949,000; Years 10–11 ฿988,000; Years 12–13 ฿999,000. |
| Named extras | Application ฿5,000; assessment ฿5,000; enrolment ฿220,000; deposit ฿50,000; resources, meals and ELS separate. | Application ฿5,500; acceptance ฿200,000; refundable student deposit ฿100,000; EAL/SfL, music, bus, uniform and boarding separate. |
| Planning point | Fees reach Grade 12, but 2026/27 new applications stop at Grade 10. | Boarding starts in Year 6; verify the acceptance-fee refund exception, support tier and current transport quote. |
| Sources | campus overview · 2026/27 fees | fee page · 2026/27 fees · accreditation |
| Live editorial | Read the SISB Rayong editorial | Read the Rugby editorial |
Both fee schedules are dated 2026/27, but headline tuition omits material charges. Request SISB’s grade, entry, resources, meals, ELS and transport rows alongside Rugby's acceptance, deposit, EAL/SfL, music, bus, uniform and boarding rows.
SISB publishes 2026/27 tuition of ฿401,700–฿789,300; Rugby publishes ฿345,000–฿999,000. Both add entry, support and service costs, so compare first-year and recurring totals for the same attendance pattern.
SISB moves from EYFS and Singapore Primary into Cambridge IGCSE and AS/A-Level. Rugby follows a British route through IGCSE and A-Level. Both reach Cambridge qualifications, but their primary stages and language models differ.
SISB’s tariff reaches Grade 12 while 2026/27 new applications stop at Grade 10. Rugby offers a complete pathway and boarding from Year 6, but families should verify current subjects, support tier and residential routine.
Both schools publish routes through age 18. SISB combines three languages and Singapore stages with Cambridge qualifications; Rugby follows a British route through IGCSE and A-Level.
Ask both schools to state the child’s proposed class, start date, age cut-off, core hours and following year. SISB publishes Nursery, Kindergarten, Primary and Grades 7–12 fee rows; Rugby publishes Pre-Nursery through Year 13, with half-day and full-day early-years choices. Similar ages do not ensure identical placement.
SISB’s new-applicant range stops at Grade 10 despite senior fees. Rugby publishes a complete route and boarding from Year 6, but parents should still confirm the offered class, present cohort, boarding availability and next-year progression.
SISB records English, Thai and Mandarin. Ask for the weekly allocation, subject language, newcomer support and transition from Singapore Primary into Cambridge stages.
Rugby records English as the medium alongside Thai and Mandarin. Ask how British primary stages appear in current work and how Years 10–11 prepare pupils for A-Level selection.
At both visits, request anonymised work and the report format. Observe how teachers explain unfamiliar tasks, differentiate work and support pupils new to English.
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.
Rugby's 2026/27 tuition runs from ฿345,000 to ฿999,000. Application is ฿5,500, acceptance ฿200,000 and refundable student deposit ฿100,000. Tuition includes textbooks, lunch and snacks, the annual residential trip, standard external exam entry and one resit.
Rugby prices EAL/SfL at ฿5,500–฿70,000 per term. Boarding from Year 6 is ฿285,100 part, ฿417,700 weekly or ฿493,800 full yearly, plus a ฿20,000 expenses deposit. Music, bus and uniform remain additional.
Create totals for cash before attendance, the complete first year and a normal recurring year. Mark refundable deposits, one-time charges, discounts and support triggered by assessment.
SISB publishes Cambridge IGCSE and AS/A-Level after its Singapore stages. Confirm which senior grades currently operate, accept newcomers and offer each subject.
Rugby publishes an established IGCSE and A-Level route. Ask for current subjects, cohort sizes, completion routes, university counselling and campus-level outcomes rather than assuming every option runs regardless of demand.
Rehearse relocation after two years. Request the transcript, curriculum map, language evidence and teacher references each school would supply.
SISB publishes ELS at ฿20,000–฿30,000 per term. Rugby publishes a five-tier EAL and Support for Learning band of ฿5,500–฿70,000 per term. Ask what triggers each tier, how often support runs and which lessons pupils miss.
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.
Rugby publishes an established IGCSE and A-Level route. Ask which subjects run this year, what minimum enrolment each option needs, how timetable conflicts are handled 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.
Rugby has direct IB registry evidence dating to 2002. Its Education Development Trust and ONESQA accreditation statements are school-published claims, and it does not currently publish a campus-specific CIS claim. SISB’s current ledger record does not list a campus-level accreditation, so parents should ask which examination-centre or programme approvals apply specifically to Rayong.
Accreditation still does not make the classroom choice automatically. Compare the proposed teacher, class size, language load, homework pattern, assessment style and reporting cadence. A pupil moving from another Singapore system may find SISB’s sequence more familiar; a pupil coming from a British school may map more directly into Rugby. Families arriving from other systems should ask both schools to explain placement using actual prior records.
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. Rugby publishes 3% off full-year tuition paid by 13 August 2026 and sibling discounts of 5%, 10% and 15% from the second through fourth child.
Keep those reductions below the standard-fee comparison. Ask whether discounts can combine and what happens if the family withdraws.
SISB is in Nong Taphan, Ban Khai; Rugby is in Khao Mai Kaew, Bang Lamung. Drive both routes at arrival and collection times, including work and sibling stops.
SISB excludes transport without a published tariff. Rugby's latest linked bus booklet remains 2025/26, so request the current address-specific quote. If boarding matters, test the Year 6–13 residential routine, deposits, room allocation and weekend arrangements.
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 Rugby, trace British primary work into IGCSE and the later A-Level decision.
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; Rugby tuition includes lunch, snacks, the standard extracurricular programme and annual residential trip. Put excluded care, trips and holiday arrangements in writing.
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; Rugby is in Khao Mai Kaew, Bang Lamung. Verify each entrance, transport route and contract address before payment. Test gate queues, parking and the return journey.
SISB is day-only in the ledger; Rugby boards from Year 6. Families considering boarding should compare the child’s actual residential week rather than subtracting commute time alone.
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, compare SISB Primary with Rugby Year 1 on language, teaching approach and complete price. At age eleven, recheck SISB’s Cambridge transition and Rugby's IGCSE preparation, current subjects, support and boarding needs.
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 both 2026/27 schedules and note who supplied every grade and support answer. That record makes the decision auditable.
SISB is lower on standard headline tuition at several overlapping stages, but entry, resources, meals, support, transport and boarding differ. Compare child-specific first-year and recurring totals.
Not in the same way. SISB combines Singapore and Cambridge stages; Rugby follows a British route through IGCSE and A-Level.
Both publish pathways through age 18, but SISB’s 2026/27 new applications stop at Grade 10. Rugby publishes Pre-Nursery through Year 13.
Ask for grade availability, tuition, application, assessment, enrolment, deposit, resources, meals, transport, trips, devices, ELS and refund terms.
Ask for attendance pattern, tuition, application, acceptance, deposits, EAL/SfL tier, music, transport, uniform, boarding and refund terms.
Use the decision framework above to weigh curriculum, fees, continuity, location and your child’s fit.