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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 26-2460667

MARIN OPEN SPACE TRUST

Tax-exempt · SAN RAFAEL, CA 94913

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990 on file
2024December 31, 2024May 15, 2025990 on file
2023December 31, 2023May 15, 2024990 on file

File the 2026 990-EZ for MARIN OPEN SPACE TRUST

Due May 17, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
26-2460667
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2010
Accounting year ends
December
Files
Form 990 or 990-EZ
Category (NTEE)
Environment (C34)

Filing history

FormYear endedRevenueExpensesAssets
990December 2025–––
990December 2024–––
990December 2023$393,742$862,036$765,250
990December 2022$1,237,432$223,032$1,228,103
990December 2021–––
990December 2020–––
990-N for 2010December 31, 2010≤ $50,000 receipts––

990-N: the IRS publishes only the latest e-Postcard per organization; earlier years appear here as 990.tax collects the monthly files. 990, 990-EZ, 990-PF: e-filed returns processed since 2019; amounts from the IRS Statistics of Income extracts where available.

Other organizations in SAN RAFAEL