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

Nonprofit · EIN 93-1004016

INSTITUTE FOR ARCHEOLOGICAL STUDIES INC

Also known as CO ALISON STENGER

Tax-exempt · PORTLAND, OR 97221

Address and contacts

Address (IRS master file)
4235 SW WESTDALE DR, PORTLAND, OR 97221-3154
In care of
% ALISON STENGER
Mailing address (990-N for 2025)
4235 SW Westdale Drive, Portland OR 97221
Principal officer (990-N for 2025)
ALISON STENGER, 4235 SW Westdale Drive, Portland OR 97221

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 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-N on file
2024May 31, 2025October 15, 2025990-N on file
2023May 31, 2024October 15, 2024990-N on file

File the 2026 990-N for INSTITUTE FOR ARCHEOLOGICAL STUDIES INC

Due October 15, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
93-1004016
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
1993
Accounting year ends
May
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: ALISON STENGER
May 31, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: ALISON STENGER
May 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Alison Stenger
May 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Alison Stenger
May 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Alison Stenger
May 31, 2020≤ $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 93-1004016).

Questions about INSTITUTE FOR ARCHEOLOGICAL STUDIES INC

What is the EIN of INSTITUTE FOR ARCHEOLOGICAL STUDIES INC?
The employer identification number (EIN) of INSTITUTE FOR ARCHEOLOGICAL STUDIES INC is 93-1004016.
Is INSTITUTE FOR ARCHEOLOGICAL STUDIES INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1993.
Are donations to INSTITUTE FOR ARCHEOLOGICAL STUDIES INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INSTITUTE FOR ARCHEOLOGICAL STUDIES INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of INSTITUTE FOR ARCHEOLOGICAL STUDIES INC 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 INSTITUTE FOR ARCHEOLOGICAL STUDIES INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended May 31, 2026.
Who is the principal officer of INSTITUTE FOR ARCHEOLOGICAL STUDIES INC?
The 990-N for 2025 names ALISON STENGER.

Other nonprofits in PORTLAND

All nonprofits in PORTLAND · Oregon