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Nonprofit · EIN 82-3777040

DIEFFENBACH FOUNDATION

Tax-exempt · WOMELSDORF, PA 19567

Address and contacts

Address (IRS master file)
51 HOST RD, WOMELSDORF, PA 19567-9421

What it must file and when

IRS records say it files Form 990-PF. Private foundations file every year. 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, 2026Not on file
2024December 31, 2024May 15, 2025Not on file
2023December 31, 2023May 15, 2024Check at the IRS

IRS record

EIN
82-3777040
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
2025
Accounting year ends
December
Files
Form 990-PF
Assets (IRS master file)
$1,456,445
Income (IRS master file)
$775,813

Filing history

No e-filed return or e-Postcard in the IRS public files.

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 82-3777040).

Questions about DIEFFENBACH FOUNDATION

What is the EIN of DIEFFENBACH FOUNDATION?
The employer identification number (EIN) of DIEFFENBACH FOUNDATION is 82-3777040.
Is DIEFFENBACH FOUNDATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2025.
Are donations to DIEFFENBACH FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does DIEFFENBACH FOUNDATION file?
Form 990-PF. Private foundations file every year.
When is the next return of DIEFFENBACH FOUNDATION due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did DIEFFENBACH FOUNDATION last file with the IRS?
There is no e-filed return or e-Postcard for it in the IRS public files.

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