Prem Tinsulanonda International School

Private internationalIBMae Rim & North

IB boarding and day school in Mae Rim, the first in Thailand to offer all four IB programmes.

Fees

School year 2026-27. Last reviewed: 11 Nov 2026 · source ↗

Year groupAgesTuitionAll-in annualYear-1 top-upYear-1 total
Early Years 1–33–5US$12,370†฿416,000US$12,370†฿416,000US$4,040†฿136,000US$16,410†฿552,000
Grade 16US$13,260†฿446,000US$13,260†฿446,000US$4,040†฿136,000US$17,310†฿582,000
Grades 2–37–8US$14,570†฿490,000US$14,570†฿490,000US$4,040†฿136,000US$18,610†฿626,000
Grades 4–59–10US$17,960†฿604,000US$17,960†฿604,000US$4,040†฿136,000US$22,000†฿740,000
Grades 6–711–12US$21,710†฿730,000US$21,710†฿730,000US$4,040†฿136,000US$25,750†฿866,000
Grade 813US$22,960†฿772,000US$22,960†฿772,000US$4,040†฿136,000US$27,000†฿908,000
Grades 9–1214–17US$24,200†฿814,000US$24,200†฿814,000US$4,040†฿136,000US$28,250†฿950,000

All-in annual fee, last five school years

School’s own fee scheduleMarket research*Estimate*

0US$5kUS$10kUS$15k2022-23: US$10,790 (฿362,800), estimate≈$10,790฿362,8002022-23*2023-24: US$11,360 (฿382,000), market research≈$11,360฿382,0002023-24*2024-25: US$12,020 (฿404,300), estimate≈$12,020฿404,3002024-25*2025-26: US$12,730 (฿428,000), school fee schedule$12,730฿428,0002025-262026-27: US$13,260 (฿446,000), school fee schedule$13,260฿446,0002026-27

2022-23 to 2026-27: 22.9% in total, about 5.3% a year (includes market-research years).

* Years marked with an asterisk are based on market research and not directly from the school, so please reference with care.

School fee schedules: 2025-26 ↗. Market research: 2023-24, BKK Kids 2024 International Schools Guide ↗. These list tuition by school level; we spread them across today’s year groups and add this year’s compulsory charges to make an all-in figure. Estimates fill years with no figure: between two known years we assume steady growth; before the earliest known year we work back at the school’s own rate, or 5.8% a year (the median rise across Chiang Mai schools that publish older schedules). A paler top on a column marks a range (charges that vary by grade).

Yearly charges in the all-in figure

None listed beyond tuition.

One-time charges (Year 1)

  • Application feeUS$178†฿6,000
  • Foundation fee (first two children only)US$3,870†฿130,000

Refundable deposits

  • Security depositUS$1,490†฿50,000

Optional extras

  • Lunch and snacksUS$1,200–1,420† (฿40,200–47,800) a year
  • School busUS$2,030–2,460† (฿68,400–82,800) a year
  • EAL supportUS$654† (฿22,000)
  • Weekly / full boardingUS$10,410† (฿350,000) / US$14,210† (฿478,000) a year
  • IB exam fees (Grade 12)charged by course
Included in tuition
Not published
Discounts
Sibling: 2nd 10%, 3rd 15%, 4th 20%, 5th 50%. 2% off for paying the full year.
Payment terms
Four terms; at least one term before starting.
Refunds
Full refund with one term's notice; 75% if withdrawing within the first two weeks of a term.

Key facts

Type
Private international
Curriculum
IB
Programmes
IB PYP, IB MYP, IB DP, IB CP
Ages
3–18
Main teaching language
English
Other languages taught
Not published
Religious association
None
Founded
2001
Owner
Not published
Accreditation and licences
IB World School (all four IB programmes)
Students
Not published
Nationalities
34
Campus size
Not published
Class size
Intensive English Programme capped at 12 per class
Student–teacher ratio
Not published

Last reviewed: 11 Nov 2026 · source ↗

Location

Area
Mae Rim & North
Address
234 Moo 3, Huay Sai, Mae Rim, Chiang Mai 50180
Distance
21.4 km from Tha Phae Gate in a straight line. Allow extra time at school-run peaks.
Map
Open in Google Maps ↗
Website
ptis.ac.th ↗

School life

Learning support
College and careers counselling from Year 9; Intensive English Programme (IEP); EAL support US$654† (฿22,000).
Results and university destinations
133 university offers, 39% from the global top 100 (school figure).
Facilities
Boarding houses, medical centre, Forest School, farm and Traidhos camp on a large rural campus.
Boarding
Yes
School day
Not published
Haze and clean air
Publishes an "Air Quality at Prem" page.
School bus
US$2,030–2,460† (฿68,400–82,800) a yearAsk which areas the bus covers.

Facts and fees are what the school publishes; “Not published” means we couldn’t find it online. Spotted a change? Tell us. For other families’ experiences, check Google reviews and visit the school.

† Prices are shown in US dollars, converted at ฿33.63 = US$1 (XE mid-market rate, 10 Nov 2026) and rounded. Schools charge in Thai baht: the baht figure shown with each price is the actual amount. Today’s rate ↗