Nonprofit · EIN 46-5240821
CENTER FOR SUSTAINABLE URBANISM INC
Tax-exempt · SUDBURY, MA 01776
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $84,198 | $56,976 | $27,222 | $70,940 | $0 | $70,940 |
| December 31, 2024 | 990-PF | $66,380 | $59,323 | $7,057 | $43,718 | $0 | $43,718 |
| December 31, 2023 | 990-PF | $53,908 | $63,183 | -$9,275 | $36,661 | $0 | $36,661 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $15,836
- Other income
- $68,362
Expenses
- Grants and similar amounts paid
- $0
Balance sheet and other
- Total assets, start of year
- $43,718
- Total assets, end of year
- $70,940
- Total liabilities, end of year
- $0
- Net assets, end of year
- $70,940
- Fair market value of assets
- $70,940
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-PF for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ROBERT M KARN 261 East Wall Street, SIGNAL HILL, CA 90755 | President | 14.5 | $0 |
| GAIL WHITNEY KARN 261 East Wall Street, Signal Hill, CA 90755 | Secretary | 30 | $0 |
| ERIC ZANELLI 160 WOODSIDE, SUDBURY, MA 01776 | Secretary | 0.25 | $0 |
990-PF for the year ended December 31, 2024: 3 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ROBERT M KARN 261 East Wall Street, SIGNAL HILL, CA 90755 | President | 14.5 | $0 |
| GAIL WHITNEY KARN 261 East Wall Street, Signal Hill, CA 90755 | Secretary | 30 | $0 |
| ERIC ZANELLI 160 WOODSIDE, SUDBURY, MA 01776 | Secretary | 0.25 | $0 |
990-PF for the year ended December 31, 2023: 3 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ROBERT M KARN 261 East Wall Street, SIGNAL HILL, CA 90755 | President | 14.5 | $0 |
| GAIL WHITNEY KARN 261 East Wall Street, Signal Hill, CA 90755 | Secretary | 30 | $0 |
| ERIC ZANELLI 160 WOODSIDE, SUDBURY, MA 01776 | Secretary | 0.25 | $0 |
Address and contacts
- Address (IRS master file)
- 160 WOODSIDE RD, SUDBURY, MA 01776-3460
- In care of
- % ROBERT KARN
- Signed the 990-PF
- ROBERT M KARN, President
- Phone
- (978) 760-1183
- Website
- WWW.CIAOCFSU.ORG
- Return prepared by
- Coastal Income Tax Services
What it must file and when
IRS records say it files Form 990-PF. Private foundations file every year. 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-PF on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-PF on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-PF on file |
IRS record
- EIN
- 46-5240821
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Private non-operating foundation
- Donations deductible (Pub 78)
- Private foundation, 30% limit
- Exempt since
- 2014
- Accounting year ends
- December
- Files
- Form 990-PF
- Category (NTEE)
- Education (B28)
- Assets (IRS master file)
- $70,940
- Income (IRS master file)
- $84,198
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $84,198 | $56,976 | $70,940 | IRS |
| 990-PF | December 2024 | $66,380 | $59,323 | $43,718 | IRS |
| 990-PF | December 2023 | $53,908 | $63,183 | $36,661 | XML |
| 990-PF | December 2022 | – | – | – | IRS |
| 990-PF | December 2021 | – | – | – | IRS |
| 990-PF | December 2020 | – | – | – | 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 46-5240821).
Questions about CENTER FOR SUSTAINABLE URBANISM INC
- What is the EIN of CENTER FOR SUSTAINABLE URBANISM INC?
- The employer identification number (EIN) of CENTER FOR SUSTAINABLE URBANISM INC is 46-5240821.
- Is CENTER FOR SUSTAINABLE URBANISM INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2014.
- Are donations to CENTER FOR SUSTAINABLE URBANISM INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does CENTER FOR SUSTAINABLE URBANISM INC file?
- Form 990-PF. Private foundations file every year.
- When is the next return of CENTER FOR SUSTAINABLE URBANISM 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 CENTER FOR SUSTAINABLE URBANISM INC last file with the IRS?
- The latest return in the IRS public files is the 990-PF for the year ended December 2025.
- Who are the officers and directors of CENTER FOR SUSTAINABLE URBANISM INC?
- The 990-PF for the year ended December 31, 2025 lists 3 people; 0 received compensation from the organization.
- How much revenue does CENTER FOR SUSTAINABLE URBANISM INC have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $84,198, expenses of $56,976 and total assets of $70,940 at year end.
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