Union of Concerned Scientists Inc
2 Brattle Sq Ste 6, Cambridge, MA · IRS data through FY2025
Revenue, expenses and net assets
Revenue Expenses Net assets
| Tax year | Revenue | Expenses | Net assets |
|---|---|---|---|
| FY2025 | $55,479,482 | $49,837,453 | $71,628,079 |
| FY2024 | $41,916,878 | $50,279,313 | $60,813,982 |
| FY2023 | $41,698,808 | $49,563,981 | $61,915,117 |
| FY2022 | $48,698,312 | $54,771,427 | $64,654,937 |
| FY2021 | $64,025,005 | $44,644,043 | $80,411,051 |
| FY2020 | $45,788,985 | $41,630,233 | $54,717,733 |
| FY2019 | $39,734,507 | $40,728,878 | $47,607,890 |
| FY2018 | $39,868,533 | $36,737,536 | $48,767,407 |
| FY2017 | $37,297,004 | $32,693,077 | $45,760,480 |
| FY2016 | $30,425,752 | $31,869,920 | $38,356,865 |
| FY2015 | $30,312,047 | $27,965,939 | $37,678,963 |
| FY2014 | $26,587,749 | $25,609,188 | $39,168,092 |
| FY2013 | $26,806,462 | $23,761,080 | $39,288,611 |
| FY2012 | $25,978,646 | $23,347,770 | $35,829,599 |
Form 990 filings
The returns filed by Union of Concerned Scientists Inc (EIN 04-2535767), 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 | $50,823,122 | 92% |
| Program service revenue | $0 | 0% |
| Other revenue | $4,656,360 | 8% |
Where the money was spent
| Category | Amount | % of expenses |
|---|---|---|
| Program services | $43,987,179 | 88% |
| Management & general | $3,160,826 | 6% |
| Fundraising | $2,689,448 | 5% |
What the numbers show
- Contributions & grants made up 92% of total revenue in FY2025.
- Program services accounted for 88% of functional expenses, management & general 6%, and fundraising 5%.
- 88% of functional expenses went to program services in FY2025. That is higher than 63% of 373 International, Foreign Affairs & National Security organizations nationwide (too few in MA for a state comparison).
- Net assets covered about 17.2 months of expenses at the end of the reporting year. That puts it in the 63rd percentile among 305 International, Foreign Affairs & National Security organizations in MA.
- Total revenue was higher than 99% of 314 International, Foreign Affairs & National Security organizations in MA.
- Total revenue rose from $25,978,646 in FY2012 to $55,479,482 in FY2025. Revenue increased in 9 and decreased in 4 of 13 year-over-year comparisons.
- Expenses exceeded revenue in 5 of 14 reported years (FY2016, FY2019, FY2022, FY2023, FY2024).
- The highest revenue on record here is $64,025,005 in FY2021.
- Net assets grew from $35,829,599 to $71,628,079 between FY2012 and FY2025.
- Contributions and grants made up 97% of revenue in FY2012 and 92% 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
THE UNION OF CONCERNED SCIENTISTS PUTS RIGOROUS, INDEPENDENT SCIENCE INTO ACTION, DEVELOPING SOLUTIONS AND ADVOCATING FOR A HEALTHY, SAFE, AND JUST FUTURE.
IRS status
| Ruling year | 1974 |
| Subsection | 501(c)(3) |
| Classification | Public charity |
| Program area (NTEE) | Q055 — International, Foreign Affairs & National Security |
| 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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