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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 16-1277561

INSTITUTE FOR THEORETICAL BIOLOGY INC

Tax-exempt · CLAYTON, NY 13624

Address and contacts

Address (IRS master file)
512 FRANKLIN ST, CLAYTON, NY 13624-1204
Mailing address (990-N for 2025)
512 FRANKLIN ST, CLAYTON NY 13624
Principal officer (990-N for 2025)
MARILYN NEULIEB, 512 FRANKLIN ST, CLAYRON NY 13624

What it must file and when

IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. 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-N on file
2024December 31, 2024May 15, 2025990-N on file
2023December 31, 2023May 15, 2024990-N on file

File the 2026 990-N for INSTITUTE FOR THEORETICAL BIOLOGY INC

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

IRS record

EIN
16-1277561
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1986
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: MARILYN NEULIEB
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: MARILYN NEULIEB
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: MARILYN NEULIEB
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: MARILYN NEULIB
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: MARILYN K NEULIEB
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Marllyn Neulieb
December 31, 2019≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: marilyn neuliev
December 31, 2018≤ $50,000 receipts––e-Postcard

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 16-1277561).

Questions about INSTITUTE FOR THEORETICAL BIOLOGY INC

What is the EIN of INSTITUTE FOR THEORETICAL BIOLOGY INC?
The employer identification number (EIN) of INSTITUTE FOR THEORETICAL BIOLOGY INC is 16-1277561.
Is INSTITUTE FOR THEORETICAL BIOLOGY INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1986.
Are donations to INSTITUTE FOR THEORETICAL BIOLOGY INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INSTITUTE FOR THEORETICAL BIOLOGY INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of INSTITUTE FOR THEORETICAL BIOLOGY INC 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 INSTITUTE FOR THEORETICAL BIOLOGY INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended December 31, 2025.
Who is the principal officer of INSTITUTE FOR THEORETICAL BIOLOGY INC?
The 990-N for 2025 names MARILYN NEULIEB.

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