Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 14-6186780

B WILLIAM MAHONEY CHARITABLE TRUST

Tax-exempt · NORWICH, NY 13815

What it must file and when

IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in September, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025September 30, 2026February 15, 2027Not due yet
2024September 30, 2025February 16, 2026990-PF on file
2023September 30, 2024February 17, 2025990-PF on file

IRS record

EIN
14-6186780
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Private non-operating foundation
Donations deductible (Pub 78)
Private foundation, 30% limit
Exempt since
1998
Accounting year ends
September
Files
Form 990-PF
Category (NTEE)
Education (B82)

Filing history

FormYear endedRevenueExpensesAssets
990-PFSeptember 2025–––
990-PFSeptember 2024–––
990-PFSeptember 2023$6,638$6,239$86,456
990-PFSeptember 2022–––
990-PFSeptember 2021–––
990-PFSeptember 2020–––
990-PFSeptember 2018–––

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 NORWICH