How much is The Stony Brook School tuition?

For 2026-27, tuition at The Stony Brook School is $34,200 (day) or $64,300 (boarding) for grades 7-8; $39,800 (day) or $64,300 (boarding) for grades 9-12; $76,700 (boarding) for grades 7-12 international, per the school's website.

Does The Stony Brook School require the ISEE or SSAT?

The Stony Brook School does not require an admission test.

When is the The Stony Brook School application deadline?

The main application deadline is December 15, 2026, and decisions are released January 15, 2027. Families apply through SchoolAdmin (school's custom application) or SAO.

Does The Stony Brook School offer financial aid?

Yes. The Stony Brook School reported $5,625,121 in financial aid to 253 students on its 2024 IRS Form 990.

How many students attend The Stony Brook School?

The Stony Brook School enrolls 442 students in grades 7–12, with about 10 students per teacher (NCES Private School Survey, 2023-24).

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The Stony Brook School tuition & admissions

Stony Brook, NYGrades 7–12Boarding, coedReligious affiliationstonybrookschool.org

Tuition 2026-27

$39,800

Boarding $76,700

Application deadline

December 15

2026

Students

442

10 students per teacher

Admission test

None

Tuition 2026-27

Grades	Day	Boarding
7-8	$34,200	$64,300
9-12	$39,800	$64,300
7-12 international	—	$76,700

Financial aid: $5,625,121 to 253 students (about $22,234 each) in 2024, per the school's IRS Form 990.

How to apply

Entry grades	—
Admission test	No test
Interview	Required
Apply through	SchoolAdmin (school's custom application) or SAO
Application fee	$100
Deadline	December 15, 2026
Decisions released	January 15, 2027

School facts

Students	442
Teachers (full-time equivalent)	44
Students per teacher	10.1
School days per year	165
Graduates going to 4-year colleges	89%
Endowment	$21,708,036 (FY2025)
Annual revenue	$34,067,202 (2024)
Head of school pay	$521,413

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The Stony Brook School FAQ

How much is The Stony Brook School tuition?: For 2026-27, tuition at The Stony Brook School is $34,200 (day) or $64,300 (boarding) for grades 7-8; $39,800 (day) or $64,300 (boarding) for grades 9-12; $76,700 (boarding) for grades 7-12 international, per the school's website.
Does The Stony Brook School require the ISEE or SSAT?: The Stony Brook School does not require an admission test.
When is the The Stony Brook School application deadline?: The main application deadline is December 15, 2026, and decisions are released January 15, 2027. Families apply through SchoolAdmin (school's custom application) or SAO.
Does The Stony Brook School offer financial aid?: Yes. The Stony Brook School reported $5,625,121 in financial aid to 253 students on its 2024 IRS Form 990.
How many students attend The Stony Brook School?: The Stony Brook School enrolls 442 students in grades 7–12, with about 10 students per teacher (NCES Private School Survey, 2023-24).

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Sources: tuition and admissions from sbs.org (checked Oct 2026); enrollment from the NCES Private School Survey 2023-24; finances from the 2024 IRS Form 990. “—” means we couldn't find it.