Submarine Force Library & Museum Assoc
Only null% goes to programs Strong reserves Growing revenue
Submarine Force Library & Museum Assoc is a 501(c)(3) organization based in Groton, Connecticut, registered in 1973, with $595,500 in FY2025 revenue. CharityIndex grades it B.
Po Box 928, Groton, CT, 06340 EIN 23-7281074 Since 1973
Revenue (FY2025)
$596K
▼ 5.6% vs prior year
Arts & Culture median: $159K
Expenses (FY2025)
$526K
Net assets
$4.2M
Employees
—
CharityIndex rating
One independent A+ to F grade from four published criteria, each scored separately from IRS filings and combined by weight.
B
—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 Submarine Force Library & Museum Assoc— this filing type doesn't report it, and the rating simply skips it (never counts it against the organization). See the exact thresholds →
B+Financial health25% of the rating97 mo reserves · +12% 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 Submarine Force Library & Museum Assoc: 97 mo reserves · +12% margin earns a B+ 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 Submarine Force Library & Museum Assoc— this filing type doesn't report it, and the rating simply skips it (never counts it against the organization). See the exact thresholds →
CTransparency10% of the rating2 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 Submarine Force Library & Museum Assoc: 2 of 5 disclosure signals earns a C on this criterion. See the exact thresholds →
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Contact & location
- Address
- Po Box 928, Groton, CT, 06340
- City
- Groton
- State
- Connecticut
- Category
- Arts, Culture & Humanities
- Subcategory
- Museums
- Website
- …
Financial trends
Revenue grew from $439K (FY2013) to $596K (FY2025) across 13 reported years.
Financial snapshot
Financial health & position (FY2025)
Liabilities $18KNet assets $4.2M
Operating margin
11.7%
Revenue exceeded expenses in the latest fiscal year.
Total assets
$4.3M
Total liabilities
$18K
Net assets
$4.2M
Financials by year
| Fiscal year | Revenue | Expenses | Net assets | Total assets | Form |
|---|---|---|---|---|---|
| 2025 | $595,500▼5.6% | $525,940▲7.4% | $4,244,110▲13.4% | $4,262,331▲13.0% | 990 |
| 2024 | $630,745▲12.6% | $489,720▲14.4% | $3,743,600▲12.3% | $3,771,816▲12.5% | 990 |
| 2023 | $560,080▲19.6% | $427,932▲4.8% | $3,332,599▲16.7% | $3,354,119▲16.4% | 990 |
| 2022 | $468,169▼50.7% | $408,234▲13.3% | $2,854,931▼16.2% | $2,882,307▼15.9% | 990 |
| 2021 | $950,300▲291% | $360,318▼15.2% | $3,405,157▲33.9% | $3,425,734▲33.9% | 990 |
| 2020 | $242,840▼44.1% | $424,932▲0.1% | $2,543,961▲2.7% | $2,558,845▲2.0% | 990 |
| 2019 | $434,070▼6.2% | $424,628▲25.2% | $2,478,068▲16.8% | $2,508,488▲17.2% | 990 |
| 2018 | $462,854▼11.7% | $339,038▼11.7% | $2,121,095▼3.6% | $2,140,086▼3.3% | 990 |
| 2017 | $524,413▲1.8% | $383,986▲5.3% | $2,200,197▲20.5% | $2,212,685▲19.2% | 990 |
| 2016 | $515,206▼22.4% | $364,515▼45.6% | $1,825,446▲11.4% | $1,856,688▲11.8% | 990 |
| 2015 | $663,716▲22.4% | $669,524▲64.7% | $1,638,817▼6.8% | $1,661,053▼7.0% | 990 |
| 2014 | $542,438▲23.5% | $406,403▲8.4% | $1,757,691▲7.2% | $1,786,009▲7.7% | 990 |
| 2013 | $439,193 | $374,968 | $1,639,317 | $1,658,565 | 990 |
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 Submarine Force Library & Museum Assoc a legitimate nonprofit?
- Yes. Submarine Force Library & Museum Assoc is a 501(c)(3) organization registered with the U.S. Internal Revenue Service under EIN 23-7281074, based in Groton, Connecticut. Donations are tax-deductible.
- What is Submarine Force Library & Museum Assoc's EIN?
- Submarine Force Library & Museum Assoc's Employer Identification Number (EIN) is 23-7281074.
- How much revenue does Submarine Force Library & Museum Assoc report?
- Submarine Force Library & Museum Assoc reported $595,500 in total revenue on its fiscal year 2025 IRS Form 990 filing.
- What financial grade does Submarine Force Library & Museum Assoc have?
- CharityIndex grades Submarine Force Library & Museum Assoc B, based on financial health (reserves and operating margin).
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Data for Submarine Force Library & Museum Assoc (EIN 23-7281074) 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.