Marinus and Minna B Koster Foundation Inc
Only null% goes to programs Strong reserves Growing revenue
Marinus and Minna B Koster Foundation Inc is a 501(c)(3) organization based in Potomac Falls, Virginia, registered in 2014, with $463,944 in FY2023 revenue. CharityIndex grades it B.
46534 Cedarhurst Dr, Potomac Falls, VA, 20165 EIN 27-1533411 Since 2014
Revenue (FY2023)
$464K
▲ 118.3% vs prior year
Philanthropy median: $168K
Expenses (FY2023)
$330K
Net assets
$7.0M
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 Marinus and Minna B Koster Foundation Inc— 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 rating254 mo reserves · +29% 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 Marinus and Minna B Koster Foundation Inc: 254 mo reserves · +29% 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 Marinus and Minna B Koster Foundation Inc— 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 Marinus and Minna B Koster Foundation Inc: 2 of 5 disclosure signals earns a C on this criterion. See the exact thresholds →
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Contact & location
- Address
- 46534 Cedarhurst Dr, Potomac Falls, VA, 20165
- City
- Potomac Falls
- State
- Virginia
- Subcategory
- Private Foundations
- Website
- …
Financial trends
Revenue grew from $321K (FY2017) to $464K (FY2023) across 7 reported years.
Financial snapshot
Financial health & position (FY2023)
Liabilities $1,250Net assets $7.0M
Operating margin
28.9%
Revenue exceeded expenses in the latest fiscal year.
Total assets
$7.0M
Total liabilities
$1,250
Net assets
$7.0M
Financials by year
| Fiscal year | Revenue | Expenses | Net assets | Total assets | Form |
|---|---|---|---|---|---|
| 2023 | $463,944▲118% | $329,891▲1.3% | $6,991,525▲10.7% | $6,992,775▲10.7% | 990PF |
| 2022 | $212,480▼26.6% | $325,598▼18.2% | $6,316,876▲8.5% | $6,319,551▲8.5% | 990PF |
| 2021 | $289,287▲42.3% | $398,032▲15.8% | $5,823,534▼15.6% | $5,824,634▼15.6% | 990PF |
| 2020 | $203,260▼8.9% | $343,853▲13.5% | $6,903,438▲36.0% | $6,904,538▲36.0% | 990PF |
| 2019 | $223,228▲95.6% | $302,988▼9.0% | $5,074,518▼1.6% | $5,076,018▼1.5% | 990PF |
| 2018 | $114,143▼64.4% | $332,950▲30.8% | $5,154,677▼4.1% | $5,154,677▼4.1% | 990PF |
| 2017 | $320,614 | $254,626 | $5,373,484 | $5,373,484 | 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 Marinus and Minna B Koster Foundation Inc a legitimate nonprofit?
- Yes. Marinus and Minna B Koster Foundation Inc is a 501(c)(3) organization registered with the U.S. Internal Revenue Service under EIN 27-1533411, based in Potomac Falls, Virginia. Donations are tax-deductible.
- What is Marinus and Minna B Koster Foundation Inc's EIN?
- Marinus and Minna B Koster Foundation Inc's Employer Identification Number (EIN) is 27-1533411.
- How much revenue does Marinus and Minna B Koster Foundation Inc report?
- Marinus and Minna B Koster Foundation Inc reported $463,944 in total revenue on its fiscal year 2023 IRS Form 990 filing.
- What financial grade does Marinus and Minna B Koster Foundation Inc have?
- CharityIndex grades Marinus and Minna B Koster Foundation Inc B, based on financial health (reserves and operating margin).
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Data for Marinus and Minna B Koster Foundation Inc (EIN 27-1533411) 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.