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Nonprofit · EIN 20-8438618

PHELPS MANSION MUSEUM

Tax-exempt · BINGHAMTON, NY 13901

Financials

$211K$282K2023$298K$320K2024$376K$330K2025
Revenue Expenses · by fiscal year end
Financials of PHELPS MANSION MUSEUM by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
May 31, 2026990$376,401$330,324$46,077$1,515,457$9,859$1,505,598
May 31, 2025990$298,199$319,867-$21,668$1,478,923$23,063$1,455,860
May 31, 2024990$210,711$282,471-$71,760$1,554,235$34,012$1,520,223
Financial details: 990 for the year ended May 31, 2026

Revenue

Contributions, gifts and grants
$278,634
of which government grants
$25,000
Membership dues
$12,353
Program service revenue
$63,777
Investment income
$12,215
Net gain from sales of assets
$6,167
Net income from fundraising events
$21,775
Other revenue
$21,775

Expenses

Grants and similar amounts paid
$0
Other salaries and wages
$139,483
Salaries, compensation and benefits (total)
$150,153
Professional fundraising fees
$0
Legal fees
$1,740
Accounting fees
$8,765
Occupancy
$15,496
Depreciation
$39,733
Program services (functional)
$268,510
Management and general (functional)
$61,814

Balance sheet and other

Total assets, start of year
$1,478,923
Total assets, end of year
$1,515,457
Total liabilities, end of year
$9,859
Net assets, end of year
$1,505,598
Land, buildings and equipment
$1,400,121
Publicly traded securities
$49,199
Net assets without donor restrictions
$61,041
Net assets with donor restrictions
$1,444,557
Gross receipts
$585,692
Employees
5
Volunteers
10
Year formed
2005
State of legal domicile
NY

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 May 31, 2026, highest compensation first.

NameTitleHours / weekCompensation
DR CHELSEA GIBSONBOARD CHAIR
Trustee or director, Officer
1$0
JOHN CHAFFEEVICE CHAIR
Trustee or director, Officer
4$0
ZACH STAFFTREASURER
Trustee or director, Officer
4$0
PAUL MILLERSECRETARY
Trustee or director, Officer
4$0
MATT GRANTDIRECTOR
Trustee or director
1$0
SUSAN KITCHENDIRECTOR
Trustee or director
1$0
MOLLY MCMANUSDIRECTOR
Trustee or director
1$0
EMILY MARINODIRECTOR
Trustee or director
1$0
990 for the year ended May 31, 2025: 9 people
NameTitleHours / weekCompensation
JENNIFER CORBYEXECUTIVE DIRECTOR
Officer
40$53,480
SEAN REARDONCHAIR/TREASURER
Trustee or director, Officer
4$0
PAUL MILLERSECRETARY
Trustee or director, Officer
4$0
JOHN CHAFFEEVICE CHAIR
Trustee or director, Officer
4$0
DR CHELSEA GIBSONDIRECTOR
Trustee or director
1$0
MATT GRANTDIRECTOR
Trustee or director
1$0
SUSAN KITCHENDIRECTOR
Trustee or director
1$0
MOLLY MCMANUSDIRECTOR
Trustee or director
1$0
EMILY MARINODIRECTOR
Trustee or director
1$0
990 for the year ended May 31, 2024: 8 people
NameTitleHours / weekCompensation
JENNIFER CORBYEXECUTIVE DIRECTOR
Officer
40$51,480
SEAN REARDONDIRECTOR
Trustee or director
1$0
PAUL MILLERSECRETARY
Trustee or director, Officer
1$0
JOHN CHAFFEEDIRECTOR
Trustee or director
1$0
LANCE HILLGOVERNANCE CHAIR
Trustee or director
1$0
SUSAN MACHARYASBOARD CHAIR
Trustee or director, Officer
3$0
MILDRED DEWITTTREASURER
Trustee or director, Officer
4$0
ZACHARY BECKDIRECTOR
Trustee or director
1$0

Address and contacts

Address (IRS master file)
191 COURT ST, BINGHAMTON, NY 13901-3503
Principal officer (990 for 2025)
CHELSEA GIBSON, 191 COURT STREET, BINGHAMTON, NY 13901
Signed the 990
CHELSEA GIBSON, BOARD CHAIR
Phone
(607) 722-4873
Return prepared by
DAVIDSON FOX & COMPANY LLP

Mission

THE PHELPS MANSION MUSEUM WILL UTILIZE AND PRESERVE ITS UNIQUE VICTORIAN FACILITY AND COLLECTIONS TO SERVE THE PUBLICE THROUGH REGULAR TOURS, EXHIBITS AND PROGRAMS EMPHASIZING LOCAL HISTORY, EDUCATION, LITERATURE, ART AND MUSIC.

990 for the year ended May 31, 2026

Program accomplishments

  • THE ORGANIZATION'S COLLECTIONS CONSIST OF ANTIQUE FURNITURE AND FIXTURES DISPLAYED IN THE PHELPS MANSION MUSEUM (A HISTORICAL HOUSE MUSEUM) WHICH FUNCTIONS AS AN EDUCATIONAL MUSEUM. THERE IS A SMALL COLLECTIONS OF CLOTHING FROM THE VICTORIAN AND EDWARDIAN PERIODS, AND A COLLECTION OF WOODWORKING TOOLS OF A CABINET MAKER WHO WORKED ON BUILDING THE MANSION IN THE EARLY 1870'S (DONATED BY THE FAMILY TO THE MUSEUM). THE MUSEUM HAS HAD EXHIBITS OF THIS PART OF OUR COLLECTIONS. ADDITIONAL EXHIBITS OF OTHER PARTS OF OUR COLLECTIONS ARE IN THE PLANNING STAGES.
    Expenses $268,510 · revenue $63,777

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 May, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025May 31, 2026October 15, 2026990 on file
2024May 31, 2025October 15, 2025990 on file
2023May 31, 2024October 15, 2024990 on file

IRS record

EIN
20-8438618
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
2007
Accounting year ends
May
Files
Form 990 or 990-EZ
Assets (IRS master file)
$1,515,457
Income (IRS master file)
$585,692

Filing history

FormYear endedRevenueExpensesAssetsReturn
990May 2026$376,401$330,324$1,515,457XML
990May 2025$298,199$319,867$1,478,923XML
990May 2024$210,711$282,471$1,554,235XML
990May 2023$147,939$292,983$1,640,669IRS
990May 2022$68,788$146,039$1,827,605IRS
990May 2021–––IRS
990May 2020–––IRS
990May 2019–––IRS
990May 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 20-8438618).

Questions about PHELPS MANSION MUSEUM

What is the EIN of PHELPS MANSION MUSEUM?
The employer identification number (EIN) of PHELPS MANSION MUSEUM is 20-8438618.
Is PHELPS MANSION MUSEUM tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2007.
Are donations to PHELPS MANSION MUSEUM tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does PHELPS MANSION MUSEUM 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 PHELPS MANSION MUSEUM due?
The return for tax year 2026 (the year ending May 31, 2027) is due October 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did PHELPS MANSION MUSEUM last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended May 2026.
Who is the principal officer of PHELPS MANSION MUSEUM?
The 990 for the year ended May 31, 2026 names CHELSEA GIBSON.
Who are the officers and directors of PHELPS MANSION MUSEUM?
The 990 for the year ended May 31, 2026 lists 8 people; 0 received compensation from the organization.
How much revenue does PHELPS MANSION MUSEUM have?
On its 990 for the year ended May 31, 2026 it reported revenue of $376,401, expenses of $330,324 and total assets of $1,515,457 at year end.

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