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Nonprofit · EIN 68-0391302

PRESTON CASTLE FOUNDATION

Tax-exempt · IONE, CA 95640

Financials

$522K$302K2023$506K$302K2024$454K$367K2025
Revenue Expenses · by fiscal year end
Financials of PRESTON CASTLE FOUNDATION by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990$454,255$367,314$86,941$4,121,354$3,967$4,117,387
December 31, 2024990$506,372$302,061$204,311$4,034,314$3,868$4,030,446
December 31, 2023990$521,853$302,224$219,629$3,829,137$3,002$3,826,135
Financial details: 990 for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$33,835
Membership dues
$1,988
Program service revenue
$397,626
Investment income
$2,480
Net income from sales of inventory
$19,547
Other revenue
$20,314

Expenses

Grants and similar amounts paid
$0
Other salaries and wages
$40,920
Salaries, compensation and benefits (total)
$44,288
Professional fundraising fees
$0
Accounting fees
$12,581
Occupancy
$15,839
Depreciation
$127,989
Program services (functional)
$292,417
Management and general (functional)
$73,017
Fundraising (functional)
$1,880

Balance sheet and other

Total assets, start of year
$4,034,314
Total assets, end of year
$4,121,354
Total liabilities, end of year
$3,967
Net assets, end of year
$4,117,387
Land, buildings and equipment
$2,835,077
Net assets without donor restrictions
$4,006,049
Net assets with donor restrictions
$111,338
Gross receipts
$479,051
Employees
1
Volunteers
200
Year formed
2001
State of legal domicile
CA

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
ROD BURTONDIRECTOR
Trustee or director
15$0
SYBIL GRIFFTHDIRECTOR
Trustee or director
15$0
DONNA MUNSONDIRECTOR
Trustee or director
15$0
DAVID BARNESDIRECTOR
Trustee or director
15$0
ANITA THOMASDIRECTOR
Trustee or director
15$0
KARL KNOBELAUCHSECRETARY TREASURER
Officer
20$0
JIM BENNETTVICE PRESIDENT
Officer
20$0
AARON PLUNKPRESIDENT
Officer
20$0
990 for the year ended December 31, 2024: 13 people
NameTitleHours / weekCompensation
SYBIL GRIFFTHDIRECTOR
Trustee or director
15$38,310
ROD BURTONDIRECTOR
Trustee or director
15$0
DONNA MUNSONDIRECTOR
Trustee or director
15$0
DAVID BARNESDIRECTOR
Trustee or director
15$0
BILL THIRYDIRECTOR
Trustee or director
15$0
NANCIE CUMMINSDIRECTOR
Trustee or director
15$0
AARON PLUNKDIRECTOR
Trustee or director
15$0
MELANIE FOXDIRECTOR
Trustee or director
15$0
ANITA THOMASDIRECTOR
Trustee or director
15$0
KARL KNOBELAUCHPRESIDENT
Officer
20$0
BARBARA MURRAYTREASURER
Officer
10$0
JIM BENNETTVICE PRESIDENT
Officer
20$0
JAMIE ANDRIOLASECRETARY
Officer
15$0
990 for the year ended December 31, 2023: 13 people
NameTitleHours / weekCompensation
NANCIE CUMMINSDIRECTOR
Trustee or director
15$0
BILL THIRYDIRECTOR
Trustee or director
15$0
DAVID BARNESDIRECTOR
Trustee or director
15$0
ANITA THOMASDIRECTOR
Trustee or director
15$0
MELANIE FOXDIRECTOR
Trustee or director
15$0
GARRETT ROGERSDIRECTOR
Trustee or director
15$0
SYBIL GRIFFTHDIRECTOR
Trustee or director
15$0
ROD BURTONDIRECTOR
Trustee or director
15$0
DONNA MUNSONDIRECTOR
Trustee or director
15$0
BARBARA MURRAYTREASURER
Officer
10$0
KARL KNOBELAUCHPRESIDENT
Officer
20$0
JAMIE ANDRIOLASECRETARY
Officer
15$0
JIM BENNETTVICE PRESIDENT
Officer
20$0

Address and contacts

Address (IRS master file)
PO BOX 488, IONE, CA 95640-0488
In care of
% KARL KNOBELAUCH
Principal officer (990 for 2025)
AARON PLUNK, PO BOX 488, IONE, CA 956400488
Signed the 990
KARL KNOBELAUCH, TREASURER
Phone
(209) 256-3632
Return prepared by
Castillo Bordwell Swift CPAs

California records

California keeps its own records of charities and corporations. Search them by EIN 68-0391302 or by the name PRESTON CASTLE FOUNDATION.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

Mission

THE PRESTON CASTLE FOUNDATION IS DEDICATED TO THE PRESERVATION, REHABILITATION, AND UTILIZATION OF THE PRESTON CASTLE HISTORICAL SITE.

990 for the year ended December 31, 2025

Program accomplishments

  • CONTINUING THE RESTORATION AND RENOVATION OF HISTORICAL PRESTON CASTLE AND SURROUNDING BUILDINGS AND LAND. PRESTON CASTLE IS LOCATED IN IONE, CALIFORNIA.
    Expenses $243,150
  • HISTORIC SITE AVAILABLE FOR SPECIAL EVENTS AND/OR PUBLIC ACTIVITIES
    Expenses $48,135
  • PUBLIC AND PRIVATE TOURS OF THE HISTORIC SITE
    Expenses $1,132

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

IRS record

EIN
68-0391302
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
1997
Accounting year ends
December
Files
Form 990 or 990-EZ
Category (NTEE)
Unknown (Z99)
Assets (IRS master file)
$4,121,354
Income (IRS master file)
$479,051

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2025$454,255$367,314$4,121,354IRS
990December 2024$506,372$302,061$4,034,314IRS
990December 2023$521,853$302,224$3,829,137XML
990December 2022$505,774$300,552$3,609,504IRS
990December 2021–––IRS
990December 2020–––IRS
990December 2018–––IRS

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 68-0391302).

Questions about PRESTON CASTLE FOUNDATION

What is the EIN of PRESTON CASTLE FOUNDATION?
The employer identification number (EIN) of PRESTON CASTLE FOUNDATION is 68-0391302.
Is PRESTON CASTLE FOUNDATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1997.
Are donations to PRESTON CASTLE FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does PRESTON CASTLE FOUNDATION file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of PRESTON CASTLE FOUNDATION due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did PRESTON CASTLE FOUNDATION last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended December 2025.
Who is the principal officer of PRESTON CASTLE FOUNDATION?
The 990 for the year ended December 31, 2025 names AARON PLUNK.
Who are the officers and directors of PRESTON CASTLE FOUNDATION?
The 990 for the year ended December 31, 2025 lists 8 people; 0 received compensation from the organization.
How much revenue does PRESTON CASTLE FOUNDATION have?
On its 990 for the year ended December 31, 2025 it reported revenue of $454,255, expenses of $367,314 and total assets of $4,121,354 at year end.

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