Millbrook School
131 Millbrook School Rd, Millbrook, NY · IRS data through FY2025
Revenue, expenses and net assets
Revenue Expenses Net assets
| Tax year | Revenue | Expenses | Net assets |
|---|---|---|---|
| FY2025 | $45,431,665 | $34,868,086 | $150,296,372 |
| FY2024 | $35,684,983 | $33,835,040 | $138,857,805 |
| FY2023 | $33,303,012 | $33,017,555 | $131,584,843 |
| FY2022 | $28,808,206 | $30,182,340 | $125,907,900 |
| FY2021 | $39,791,134 | $29,952,439 | $138,958,713 |
| FY2020 | $30,124,599 | $25,922,165 | $114,952,284 |
| FY2019 | $28,794,057 | $26,267,862 | $110,460,030 |
| FY2018 | $33,011,017 | $24,739,510 | $106,822,139 |
| FY2017 | $31,208,439 | $23,923,621 | $98,157,251 |
| FY2016 | $30,687,762 | $22,164,921 | $88,488,281 |
| FY2015 | $24,826,245 | $21,076,973 | $83,301,613 |
| FY2014 | $28,737,410 | $20,634,242 | $80,490,539 |
| FY2013 | $25,309,433 | $18,353,942 | $71,264,234 |
| FY2012 | $20,501,810 | $16,917,737 | $63,607,013 |
Form 990 filings
The returns filed by Millbrook School (EIN 14-1413770), including Form 990 PDFs and e-file data by year, are available in ProPublica's Nonprofit Explorer. The figures on this page come from IRS data files built from those returns.
Where the revenue came from
| Source | Amount | % of revenue |
|---|---|---|
| Contributions & grants | $10,504,769 | 23% |
| Program service revenue | $26,686,901 | 59% |
| Other revenue | $8,239,995 | 18% |
Where the money was spent
| Category | Amount | % of expenses |
|---|---|---|
| Program services | $26,854,438 | 77% |
| Management & general | $5,765,794 | 17% |
| Fundraising | $2,247,854 | 6% |
What the numbers show
- Program service revenue made up 59% of total revenue in FY2025.
- Program services accounted for 77% of functional expenses, management & general 17%, and fundraising 6%.
- 77% of functional expenses went to program services in FY2025. That is higher than 16% of 412 Education organizations in NY.
- Net assets covered about 51.7 months of expenses at the end of the reporting year. That puts it in the 76th percentile among 4118 Education organizations in NY.
- Total revenue was higher than 96.6% of 4244 Education organizations in NY.
- Total revenue rose from $20,501,810 in FY2012 to $45,431,665 in FY2025. Revenue increased in 10 and decreased in 3 of 13 year-over-year comparisons.
- Expenses exceeded revenue in 1 of 14 reported years (FY2022).
- Net assets grew from $63,607,013 to $150,296,372 between FY2012 and FY2025.
- Contributions and grants made up 33% of revenue in FY2012 and 23% in FY2025.
- Listed in the IRS Publication 78 data as eligible to receive tax-deductible contributions (public charity).
Figures compared against other organizations of the same NTEE program area in the same state. See the methodology page for how these are calculated and the guide to reading nonprofit financials for their limits.
About this organization
MILLBROOK SCHOOL IS A COEDUCATIONAL, COLLEGE PREPARATORY SCHOOL WHICH OFFERS COLLEGE PREPARATORY EDUCATION TO ITS BOARDING AND DAY STUDENTS.
IRS status
| Ruling year | 1933 |
| Subsection | 501(c)(3) |
| Classification | Public charity |
| Program area (NTEE) | B250 — Education (in NY) |
| Donations | Listed in the IRS Publication 78 data as eligible to receive tax-deductible contributions (public charity). |
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Source: Internal Revenue Service — Exempt Organizations Business Master File (downloaded November 4, 2026), Statistics of Income extracts, Form 990 e-file data, Publication 78 and the Automatic Revocation list. Figures are as reported by the organization; IRS processing may adjust them. This is not a charity rating and not tax advice. Confirm deductibility in IRS Tax Exempt Organization Search.
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