Middlesex School
PO Box 9122, Concord, MA · IRS data through FY2025
Revenue, expenses and net assets
Revenue Expenses Net assets
| Tax year | Revenue | Expenses | Net assets |
|---|---|---|---|
| FY2025 | $59,021,357 | $54,692,137 | $415,513,975 |
| FY2024 | $48,448,306 | $50,025,587 | $359,354,367 |
| FY2023 | $42,360,502 | $47,028,564 | $353,682,707 |
| FY2022 | $51,673,207 | $46,626,306 | $357,743,348 |
| FY2021 | $51,739,388 | $42,792,209 | $408,711,859 |
| FY2020 | $48,353,374 | $41,913,982 | $320,277,845 |
| FY2019 | $52,067,485 | $42,358,097 | $311,691,240 |
| FY2018 | $46,813,883 | $39,077,395 | $299,309,281 |
| FY2017 | $48,216,889 | $36,910,705 | $276,558,052 |
| FY2016 | $40,287,686 | $39,793,955 | $249,998,199 |
| FY2015 | $53,534,113 | $33,596,280 | $251,914,489 |
| FY2014 | $37,868,963 | $31,375,959 | $224,865,034 |
| FY2013 | $30,618,599 | $30,221,298 | $198,576,279 |
| FY2012 | $29,582,664 | $35,355,569 | $176,190,291 |
Form 990 filings
The returns filed by Middlesex School (EIN 04-2103821), 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 | $14,814,823 | 25% |
| Program service revenue | $30,105,880 | 51% |
| Other revenue | $14,100,654 | 24% |
Where the money was spent
| Category | Amount | % of expenses |
|---|---|---|
| Program services | $40,236,285 | 74% |
| Management & general | $11,471,689 | 21% |
| Fundraising | $2,984,163 | 5% |
What the numbers show
- Program service revenue made up 51% of total revenue in FY2025.
- Program services accounted for 74% of functional expenses, management & general 21%, and fundraising 5%.
- 74% of functional expenses went to program services in FY2025. That is higher than 12.1% of 182 Education organizations in MA.
- Net assets covered about 91.2 months of expenses at the end of the reporting year. That puts it in the 81st percentile among 2334 Education organizations in MA.
- Total revenue was higher than 97.6% of 2371 Education organizations in MA.
- Total revenue rose from $29,582,664 in FY2012 to $59,021,357 in FY2025. Revenue increased in 8 and decreased in 5 of 13 year-over-year comparisons.
- Expenses exceeded revenue in 3 of 14 reported years (FY2012, FY2023, FY2024).
- Net assets grew from $176,190,291 to $415,513,975 between FY2012 and FY2025.
- Contributions and grants made up 36% of revenue in FY2012 and 25% 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
MIDDLESEX SCHOOL IS A COLLEGE-PREPARATORY SCHOOL FOR GRADES 9 THROUGH 12.
IRS status
| Ruling year | 1944 |
| Subsection | 501(c)(3) |
| Classification | Public charity |
| Program area (NTEE) | B250 — Education (in MA) |
| 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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