| FS1 | KG1/FS2 | KG2/Y1 | G1/Y2 | G2/Y3 | G3/Y4 | G4/Y5 | G5/Y6 | G6/Y7 | G7/Y8 | G8/Y9 | G9/Y10 | G10/Y11 | G11/Y12 | G12/Y13 |
| 324,120 | 351,900 | 403,440 | 437,940 | 541,382 | 541,382 | 541,382 | 541,382 | 568,440 | 568,440 | 568,440 | 649,710 | 974,565 | 974,565 | 974,565 |
| Application Fee, Registration Fee, Deposits Thai | Pre-Nursery to Year 1 | Year 2 to Year 13 |
| Baht (THB) | (EY Campus) | (WP Campus) |
| Application Fee (non-refundable) | 5,000 | 5,000 |
| One-time Registration Fee (non-refundable) | 100,000 | 100,000 |
| One-time School Development Fee (non-refundable) | 20,000 | 20,000 |
| One-time Enrollment Fee (non-refundable) | N/A | 50,000 |
| One-time Enrollment Deposit – Day Student and | 50,000 | 50,000 |
| Weekly Boarding Student Only (refundable*) | ||
| One-time Enrollment Deposit – Overseas Full | N/A | 100,000 |
| Boarding Student Only (refundable*) |
Application Fee: This is payable prior to taking the admissions assessment and CAT tests.
One-time Registration Fee and One-time Enrollment Fee: These two fees are both payable upon acceptance of your child and before he/she is admitted to the school. The one-time enrollment fee is only applicable to students joining Year 2-13 on WP Campus.
The THB 50,000/THB100,000 Enrollment Deposit will be refunded when the child leaves the school, provided that the Headmaster has received one term’s notice in writing of the intention to withdraw and no fees are outstanding – please refer to the schedule below. If the withdrawal notice is received by the School after the deadlines shown below, no refund will be given:
| For a student to withdraw at the end of: | Student Withdrawal Notice Deadline |
| Term 1 | Wednesday 29th June |
| (with the last day of Term being Friday 16th December) | |
| Term 2 | Friday 16th December |
| (with the last day of Term being Wednesday 5th April) | |
| Term 3 | Wednesday 5th April |
| (with the last day of Term being Thursday 29th June) |
Tuition Fees: includes non-chargeable ECAs and standard level EAL support.
Sibling Discount: A discount of 5% off tuition fees applies to the second child, 15% for the third child and 50% for the fourth child (if the child is enrolled at the school, at the same time). The discount will not apply once the older sibling graduates/leaves the school for any reason.
Meal Fees: This is a compulsory fee and all students enrolled at BIST are expected to use the catering services provided by the school (with the exception of a student having a medically certified, acute dietary allergy that the school cannot cater for). The fee must be paid in full together with all other invoiced fees.
Examination Fees: These are invoiced separately at the start of Term 2 of Year 11, 12 and 13, in accordance with the charges levied by the relevant external examination boards plus administration costs. Please note that students will not be able to sit any external examinations at school unless all exam fees and tuition fees have been paid in full. There will be no refund of any external examination fees if a student withdraws from any examination after the final withdrawal cutoff date, given by the external examination boards each year.
It is an expectation that students will sit all examinations for subjects studied at BIST.
Prepayment Discount: For those parents who wish to pay one year’s advance fees (all to be paid at the same time – tuition, lunch, boarding, school bus, residential trip, EAL etc.) Term 1, Term 2 and Term 3 together, they will receive a 3% discount off the annual tuition fees amount only. This discount does not apply to any other type of fee paid. Please contact the Finance Department for more information if you wish to pay your fees annually.
Late Entry: For new students entering the school late into any academic Term, Tuition Fees, EAL Fees, Boarding Fees, Meal Fees and School Bus Fees will be prorated accordingly.
Inclusive of accommodation, compulsory medical insurance and all meals
| Boarding Options | Term 1 | Term 2 | Term 3 |
| Full Boarding (7 days a week) | 171,700 | 139,400 | 113,900 |
| Weekly Boarding (4 p.m. Sunday to 4 p.m. Friday) | 125,800 | 102,000 | 81,600 |
| Daily Boarding (overnight from 4 p.m. to 7.30 am) | 2,100 | 2,100 | 2,100 |
Textbooks: Most textbooks are provided in lessons by the various academic departments where needed, but in some circumstances, students have the option to purchase textbooks from the school or from external bookshops as advised.Additional English as a Second Language (EAL): This fee is charged to those students requiring additional/intensive EAL support above and beyond the usual curriculum provision, including one-to-one withdrawal support.
School Bus Fees: This fee must be paid in full each term prior to getting the service. Please note that a student will not be allowed to board the school bus if the fee has not been paid in advance.
Transcript Fees: Up to three transcripts will be provided free of charge to students who are leaving the school. Students who request additional transcripts are charged at THB 500 per transcript for processing, in addition to the actual postage/courier rates.