William S Perper Foundation
Only null% goes to programs Strong reserves
William S Perper Foundation is a 501(c)(3) organization based in New York, New York, registered in 2012, with $70,579 in FY2025 revenue. CharityIndex grades it F.
1 Rockefeller Plz Frnt 3, New York, NY, 10020 EIN 45-6337299 Since 2012
Revenue (FY2025)
$71K
▲ 13.4% vs prior year
Philanthropy median: $168K
Expenses (FY2025)
$212K
Net assets
$841K
Employees
—
CharityIndex rating
One independent A+ to F grade from four published criteria, each scored separately from IRS filings and combined by weight.
F
—Program efficiency40% of the ratingNo expense breakdown in filings
Measures how much of every dollar spent actually reaches programs, plus what it costs to raise $100 of donations. The worse of the two measures sets the letter (85%+ to programs is an A; under $15 to raise $100 is an A), averaged over the three most recent filings. Not scored for William S Perper Foundation— this filing type doesn't report it, and the rating simply skips it (never counts it against the organization). See the exact thresholds →
FFinancial health25% of the rating48 mo reserves · -200% margin
Measures whether the organization is built to last: how many months its reserves would cover expenses (3+ months earns an A-range score, but hoarding 5+ years of budget is capped) and whether it runs a surplus or a deficit. For William S Perper Foundation: 48 mo reserves · -200% margin earns a F on this criterion. See the exact thresholds →
—Governance25% of the ratingNot reported in this filing type
Checks how the organization is run, from its own Form 990: an independent board majority, a board of five or more, conflict-of-interest, whistleblower and document-retention policies, and independently audited financials. The share of disclosed checks that pass sets the letter. Not scored for William S Perper Foundation— this filing type doesn't report it, and the rating simply skips it (never counts it against the organization). See the exact thresholds →
DTransparency10% of the rating1 of 5 disclosure signals
Counts five disclosure signals: a recent filing, a mission statement, program descriptions, a listed website, and the full expense breakdown. More disclosure, better letter. For William S Perper Foundation: 1 of 5 disclosure signals earns a D on this criterion. See the exact thresholds →
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Contact & location
- Address
- 1 Rockefeller Plz Frnt 3, New York, NY, 10020
- City
- New York
- State
- New York
- Subcategory
- Philanthropy Programs
Financial trends
Revenue declined from $72K (FY2013) to $71K (FY2025) across 13 reported years.
Financial snapshot
Financial health & position (FY2025)
Liabilities $0Net assets $841K
Operating margin
-200.3%
Spent more than it raised in the latest fiscal year.
Total assets
$841K
Total liabilities
$0
Net assets
$841K
Financials by year
| Fiscal year | Revenue | Expenses | Net assets | Total assets | Form |
|---|---|---|---|---|---|
| 2025 | $70,579▲13.4% | $211,979▲42.3% | $841,152▼13.0% | $841,152▼13.0% | 990PF |
| 2024 | $62,212▲11.5% | $148,952▼30.0% | $967,113▼5.2% | $967,113▼5.2% | 990PF |
| 2023 | $55,814▼31.6% | $212,757▼19.7% | $1,019,691▼9.8% | $1,019,691▼9.8% | 990PF |
| 2022 | $81,582▼28.7% | $264,942▼6.4% | $1,130,642▼27.3% | $1,130,642▼27.3% | 990PF |
| 2021 | $114,357▼15.2% | $283,150▲13.7% | $1,555,426▼6.9% | $1,555,426▼6.9% | 990PF |
| 2020 | $134,870▲42.1% | $249,037▲3.5% | $1,670,953▼2.9% | $1,670,953▼2.9% | 990PF |
| 2019 | $94,926▲43.5% | $240,677▼29.5% | $1,720,855▲0.5% | $1,720,855▲0.5% | 990PF |
| 2018 | $66,146▲15.3% | $341,545▲21.6% | $1,712,561▼19.0% | $1,712,561▼19.0% | 990PF |
| 2017 | $57,390▲151% | $280,915▼30.9% | $2,115,454▼3.7% | $2,115,454▼3.7% | 990PF |
| 2016 | $22,850▼83.1% | $406,760▼4.6% | $2,197,433▼13.1% | $2,197,433▼13.1% | 990PF |
| 2015 | $135,191▲25.2% | $426,452▼2.5% | $2,527,649▼14.5% | $2,527,649▼14.5% | 990PF |
| 2014 | $107,948▲49.4% | $437,545▲41.4% | $2,956,282▼11.4% | $2,956,282▼11.4% | 990PF |
| 2013 | $72,278 | $309,433▼14.2% | $3,334,835▼2.6% | $3,334,835▼2.6% | 990PF |
| 2012 | — | $360,744 | $3,425,350 | $3,425,350 | 990PF |
Original Form 990 PDFs (the Form column) are served by ProPublica Nonprofit Explorer, as filed with the IRS. Create a free account to download the CSV report.
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Frequently asked questions
- Is William S Perper Foundation a legitimate nonprofit?
- Yes. William S Perper Foundation is a 501(c)(3) organization registered with the U.S. Internal Revenue Service under EIN 45-6337299, based in New York, New York. Donations are tax-deductible.
- What is William S Perper Foundation's EIN?
- William S Perper Foundation's Employer Identification Number (EIN) is 45-6337299.
- How much revenue does William S Perper Foundation report?
- William S Perper Foundation reported $70,579 in total revenue on its fiscal year 2025 IRS Form 990 filing.
- What financial grade does William S Perper Foundation have?
- CharityIndex grades William S Perper Foundation F, based on financial health (reserves and operating margin).
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Data for William S Perper Foundation (EIN 45-6337299) comes from the IRS Business Master File and e-filed Form 990 returns, via CharityIndex. Figures reflect what the organization reported to the IRS for each fiscal year.