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. Phoenix Wittaya serves ages two to 17+ through a Thai-core, school-described Cambridge-aligned bilingual programme, but its formerly cited tariff is no longer available. Obtain a dated complete quote before comparing cost.
// Jump to → SISB Rayong editorial ↗ · Phoenix Wittaya editorial ↗ · SISB Rayong vs BEST ↗ · SISB Rayong vs REPS ↗ · SISB Rayong vs Satit Udomseuksa ↗ · Garden Rayong vs Phoenix Wittaya ↗
Both schools publish provision from the early years through secondary, but they are not interchangeable. SISB follows an international Singapore-to-Cambridge sequence. Phoenix Wittaya follows Thailand's Basic Education Core Curriculum with a bilingual programme the school describes as Cambridge-aligned; that wording is not treated as independent Cambridge accreditation.
// In this guide → SISB Rayong editorial ↗ · Phoenix Wittaya editorial ↗ · SISB Rayong vs BEST ↗ · SISB Rayong vs REPS ↗ · SISB Rayong vs Satit Udomseuksa ↗ · Garden Rayong vs Phoenix Wittaya ↗ · British schools hub ↗ · Budget schools hub ↗
| Dimension | SISB Rayong | Phoenix Wittaya School |
|---|---|---|
| School | Singapore International School Rayong | Phoenix Wittaya School |
| Age span | Ages 2–18; 2026/27 new applications Nursery 1–Grade 10 | Ages 2–17+; Nursery through Secondary 6/Year 13 |
| Curriculum | EYFS, Singapore Primary, Singapore/UK hybrid Grades 7–8, Cambridge IGCSE and AS/A-Level | Thai Basic Education Core Curriculum with a school-described Cambridge-aligned bilingual programme |
| 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 formerly cited school-domain tariff no longer publishes Phoenix tuition, so previous figures are retired. |
| Named extras | Application ฿5,000; assessment ฿5,000; enrolment ฿220,000; deposit ฿50,000; resources, meals and ELS separate. | No current public tariff for entry charges, meals, books, transport, insurance or other compulsory and optional extras. |
| Planning point | Fees reach Grade 12, but 2026/27 new applications stop at Grade 10. | Obtain a dated grade-specific quote and verify what Cambridge-aligned means for subjects, examinations and final credentials. |
| Sources | campus overview · 2026/27 fees | retired fee-source check · school overview · age placement · secondary programme · OPEC listing |
| Live editorial | Read the SISB Rayong editorial | Read the Phoenix Wittaya editorial |
Phoenix's former fee figures are not usable current evidence. Request SISB’s grade, entry, resources, meals, ELS and transport rows alongside a dated Phoenix quote naming 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. Phoenix publishes no usable current tariff; its previously cited school-domain fee source now resolves to unrelated content.
SISB moves from EYFS and Singapore Primary into Cambridge IGCSE and AS/A-Level. Phoenix follows Thailand's core curriculum in Thai and English and describes its bilingual teaching as Cambridge-aligned.
SISB’s tariff reaches Grade 12 while 2026/27 new applications stop at Grade 10. Phoenix families need a dated complete quote plus written evidence of subject languages, examinations and final 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; Phoenix Wittaya 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. Phoenix describes Nursery through Secondary 6/Year 13.
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.
Phoenix Wittaya 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.
Phoenix has no current public tuition, entry or extras schedule in the ledger. Earlier figures have been retired because the formerly cited school-domain source no longer publishes Phoenix information. Do not carry an old price into this comparison or infer one from another bilingual school.
Ask Phoenix for a dated offer naming the child, grade, programme, academic year, tuition, application or registration, deposit, meals, books, transport, insurance, uniforms, activities, examinations and support. A Phoenix 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.
Phoenix describes Nursery through Secondary 6/Year 13, but a Cambridge-aligned programme is not automatically a Cambridge qualification. Ask which final Thai or international credential and transcript pupils receive, which examinations they enter and what English-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. Phoenix Wittaya 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.
Phoenix describes secondary through Secondary 6/Year 13. Ask which upper-secondary tracks run now, which subjects are taught in English, what national or international 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.
Phoenix appears in Thailand's Office of the Private Education Commission directory. That verifies a private-school record but does not independently verify Cambridge registration or examinations. 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 Phoenix ledger records no usable standard fee or discount tariff.
Ask Phoenix 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; Phoenix Wittaya is in Nongprue. Drive both routes at arrival and collection times, including work and sibling stops.
Phoenix Wittaya advertises bus service without a current public price, and neither ledger record supplies a comparable address quote. Ask for 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 Phoenix Wittaya, 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. Phoenix Wittaya publishes that food and bus services exist but not what a current family at a specific stage and address will pay, so both require a written inclusion 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; Phoenix Wittaya 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 Phoenix Wittaya's Thai bilingual primary sequence create different language and transfer demands. At age eleven, compare SISB's growing Cambridge transition with Phoenix Wittaya'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 Phoenix 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 Phoenix'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; Phoenix's formerly cited tariff is no longer available and earlier figures have been retired.
No. SISB combines Singapore and Cambridge stages. Phoenix follows Thailand's core curriculum and school-described Cambridge-aligned bilingual teaching; alignment is not independent Cambridge accreditation.
SISB publishes ages 2–18, with 2026/27 new applications through Grade 10. Phoenix describes ages 2–17+ and Nursery through Secondary 6/Year 13.
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.