Nonprofit · EIN 13-3542980
SPACE FRONTIER FOUNDATION INC
Tax-exempt (reinstated) · WASHINGTON, DC 20004
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $122,872 | $314,692 | -$191,820 | $175,795 | -$115 | $175,910 |
| December 31, 2024 | 990 | $123,469 | $213,248 | -$89,779 | $367,730 | $0 | $367,730 |
| December 31, 2023 | 990 | $24,904 | $186,423 | -$161,519 | $458,288 | $0 | $458,288 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $100,000
- Program service revenue
- $13,357
- Investment income
- $9,142
- Other revenue
- $373
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $144,757
- Other salaries and wages
- $51,123
- Salaries, compensation and benefits (total)
- $195,880
- Professional fundraising fees
- $0
- Accounting fees
- $17,367
- Travel
- $46,024
- Program services (functional)
- $207,787
- Management and general (functional)
- $106,905
Balance sheet and other
- Total assets, start of year
- $367,730
- Total assets, end of year
- $175,795
- Total liabilities, end of year
- -$115
- Net assets, end of year
- $175,910
- Gross unrelated business income
- $9,142
- Gross receipts
- $122,872
- Employees
- 0
- Volunteers
- 15
- Year formed
- 1988
- State of legal domicile
- GA
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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Taylor Winkleman | Director Trustee or director | 15 | $90,757 |
| Aaron Oesterle | Director Trustee or director, Officer | 8 | $54,000 |
| Michael Mealling | Director Trustee or director, Officer | 0 | $0 |
| Miekkal Clarkson | Director Trustee or director | 0 | $0 |
| Sean Mahoney | Board Chair Trustee or director, Officer | 0 | $0 |
990 for the year ended December 31, 2024: 11 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Aaron Oesterle | Director Trustee or director, Officer | 15 | $41,500 |
| Sean Mahoney | Board Chair Trustee or director, Officer | 8 | $20,000 |
| Taylor Winkleman | Director Trustee or director | 0 | $0 |
| Miekkal Clarkson | Director Trustee or director | 0 | $0 |
| Michael Mealling | Director Trustee or director, Officer | 0 | $0 |
| Eric Ingram | Director Trustee or director | 0 | $0 |
| Jim Muncy | Director Trustee or director | 0 | $0 |
| Libby Loyd | Director Trustee or director | 0 | $0 |
| Malak Crisp | Director Trustee or director | 0 | $0 |
| Megan Bennett | Director Trustee or director | 0 | $0 |
| Quade MacDonald | Director Trustee or director | 0 | $0 |
990 for the year ended December 31, 2023: 9 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Sean Mahoney | Board Chair Trustee or director, Officer | 0 | $2,000 |
| Eric Ingram | Director Trustee or director | 0 | $0 |
| Malak Crisp | Director Trustee or director | 0 | $0 |
| Miekkal Clarkson | Director Trustee or director | 0 | $0 |
| Jim Muncy | Director Trustee or director | 0 | $0 |
| Quade Macdonald | Director Trustee or director | 0 | $0 |
| Libby Loyd | Director Trustee or director, Officer | 0 | $0 |
| Michael Mealling | Director Trustee or director, Officer | 0 | $0 |
| Megan Bennett | Director Trustee or director, Officer | 0 | $0 |
Address and contacts
- Address (IRS master file)
- 1455 PENNSYLVANIA AVE NW STE 400, WASHINGTON, DC 20004-1017
- In care of
- % SEAN MAHONEY
- Principal officer (990 for 2025)
- Sean Mahoney, 1455 Pennsylvania Ave NW Suite 400, Washington, DC 20004
- Signed the 990
- Sean Mahoney, Director
- Phone
- (404) 229-5848
- Website
- www.spacefrontier.org
- Return prepared by
- TRIVIUM TAX INC
Mission
Education of the public on issues of space exploration, development and settlement, and the development and settlement of space by nongovernmental means.
Program accomplishments
- Pathfinder Initiative: By leveraging access to policy leaders and robust academic research, Pathfinder will develop the international standard for a stable carbon market with robust American participation.Expenses $143,886
- Political Advocacy: The Space Frontier Foundation remains one of the most effective organizations that pursues legislation expressing Congress' support for commercial space development as an organizing goal of U.S. space policy.Expenses $59,775
- Space Based Solar Power: The Space Frontier Foundation advanced its mission to create the landscape and conditions necessary for commercial Space Solar Power (SSP) to become viable,competitive, and ultimately self-sustaining. Across U.S. Government engagement, industry convening, student development, and media leadership, SFF is becoming the recognized nexus for SSP advocacy and coordination globally.Expenses $4,126
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 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 13-3542980
- 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
- 1990
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Science and technology (U01)
- Assets (IRS master file)
- $175,795
- Income (IRS master file)
- $122,872
Revocation and reinstatement
- Exemption revoked
- May 15, 2022
- Posted by the IRS
- February 15, 2023
- Reinstated
- Effective May 15, 2022
From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $122,872 | $314,692 | $175,795 | XML |
| 990 | December 2024 | $123,469 | $213,248 | $367,730 | XML |
| 990 | December 2023 | $24,904 | $186,423 | $458,288 | XML |
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 13-3542980).
Questions about SPACE FRONTIER FOUNDATION INC
- What is the EIN of SPACE FRONTIER FOUNDATION INC?
- The employer identification number (EIN) of SPACE FRONTIER FOUNDATION INC is 13-3542980.
- Is SPACE FRONTIER FOUNDATION INC tax-exempt?
- Yes. The IRS revoked its exemption on May 15, 2022 and reinstated it effective May 15, 2022.
- Are donations to SPACE FRONTIER FOUNDATION INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SPACE FRONTIER FOUNDATION INC 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 SPACE FRONTIER FOUNDATION 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 SPACE FRONTIER FOUNDATION INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of SPACE FRONTIER FOUNDATION INC?
- The 990 for the year ended December 31, 2025 names Sean Mahoney.
- Who are the officers and directors of SPACE FRONTIER FOUNDATION INC?
- The 990 for the year ended December 31, 2025 lists 5 people; 2 received compensation from the organization, the highest $90,757 (Taylor Winkleman, Director).
- How much revenue does SPACE FRONTIER FOUNDATION INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $122,872, expenses of $314,692 and total assets of $175,795 at year end.
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