Nonprofit · EIN 82-1971527
SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE
Tax-exempt · JENISON, MI 49428
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $82,554 | $55,953 | $26,601 | $292,676 | $0 | $292,676 |
| December 31, 2024 | 990-EZ | $69,718 | $69,493 | $225 | $266,075 | $0 | $266,075 |
| December 31, 2023 | 990-EZ | $110,573 | $62,185 | $48,388 | $265,850 | $0 | $265,850 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $5,631
- Membership dues
- $17,668
- Program service revenue
- $51,990
- Investment income
- $7,265
Expenses
- Compensation of officers, directors and key employees
- $0
- Professional fees and payments to contractors
- $500
- Other expenses
- $55,453
- Program services (functional)
- $19,564
Balance sheet and other
- Total assets, start of year
- $266,075
- Total assets, end of year
- $292,676
- Total liabilities, end of year
- $0
- Net assets, end of year
- $292,676
- Cash, savings and investments
- $292,676
- Gross receipts
- $82,554
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-EZ for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KATHERINE CORKER | EXECUTIVE DIRECTOR | 5 | $0 |
| SIMINE VAZIRE | DIRECTOR | 5 | $0 |
990-EZ for the year ended December 31, 2024: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KATHERINE CORKER | EXECUTIVE DIRECTOR | 5 | $0 |
| SIMINE VAZIRE | DIRECTOR | 5 | $0 |
990-EZ for the year ended December 31, 2023: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KATHERINE CORKER | EXECUTIVE DIRECTOR | 5 | $0 |
| SIMINE VAZIRE | DIRECTOR | 5 | $0 |
Address and contacts
- Address (IRS master file)
- 8536 TWIN LAKES DR, JENISON, MI 49428-8665
- In care of
- % KATIE CORKER
- Signed the 990-EZ
- KATIE CORKER, EXECUTIVE DIRECTOR
- Phone
- (319) 610-5597
- Website
- HTTP://IMPROVINGPSYCH.ORG/
- Return prepared by
- Doug Zandstra CPA CFE EA
Mission
SEE BELOW
Program accomplishments
- SIPS IS A SERVICE ORGANIZATION AIMING TO MAKE PSYCHOLOGICAL SCIENCE HIGHER QUALITY AND MORE CUMULATIVE BY PURSUING ACTIVITIES IMPROVING TRAINING AND RESEARCH PRACTICES.Expenses $19,564 · grants $12,540
- PSYARXIV HOSTS SCIENTIFIC WORKING PAPERS, UNPUBLISHED WORK, AND ARTICLES UNDER REVIEW (PREPRINTS).
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 year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-EZ on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 82-1971527
- 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
- 2017
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A03)
- Assets (IRS master file)
- $292,676
- Income (IRS master file)
- $82,554
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | December 2025 | $82,554 | $55,953 | $292,676 | IRS |
| 990-EZ | December 2024 | $69,718 | $69,493 | $266,075 | IRS |
| 990-EZ | December 2023 | $110,573 | $62,185 | $265,850 | XML |
| 990-EZ | December 2022 | – | – | – | IRS |
| 990-EZ | December 2021 | – | – | – | IRS |
| 990-EZ | December 2020 | – | – | – | IRS |
| 990-EZ | December 2019 | – | – | – | IRS |
| 990-EZ | December 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 82-1971527).
Questions about SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE
- What is the EIN of SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE?
- The employer identification number (EIN) of SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE is 82-1971527.
- Is SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2017.
- Are donations to SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE 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 SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE 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 SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
- Who are the officers and directors of SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE?
- The 990-EZ for the year ended December 31, 2025 lists 2 people; 0 received compensation from the organization.
- How much revenue does SOCIETY FOR THE IMPROVEMENT OF PSYCHOLOGICAL SCIENCE have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $82,554, expenses of $55,953 and total assets of $292,676 at year end.
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