Nonprofit · EIN 20-3177592
MUSOPEN
Tax-exempt · REDWOOD CITY, CA 94061
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $98,660 | $65,303 | $33,357 | $88,435 | $0 | $88,435 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Membership dues
- $56,306
- Program service revenue
- $35,809
- Investment income
- $0
- Net gain from sales of assets
- $6,545
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $65,303
Balance sheet and other
- Total assets, start of year
- $55,078
- Total assets, end of year
- $88,435
- Total liabilities, end of year
- $0
- Net assets, end of year
- $88,435
- Cash, savings and investments
- $88,435
- Gross receipts
- $98,660
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 |
|---|---|---|---|
| Aaron Dunn | Founder | 20 | $0 |
Address and contacts
- Address (IRS master file)
- 1199 SAINT FRANCIS ST, REDWOOD CITY, CA 94061-2140
- In care of
- % AARON DUNN
- Mailing address (990-N for 2015)
- 1000 CHESTNUT ST 8C, San Francisco CA 94109
- Principal officer (990-N for 2015)
- Aaron Dunn, 1000 CHESTNUT ST 8C, San Francisco CA 94109
- Signed the 990-EZ
- Aaron Dunn, Founder, Owner
- Phone
- (818) 392-4634
Mission
Musopen is a 501c3 non-profit focused on improving access and exposure to music by creating free resources and educational materials. We provide recordings, sheet music, music applications and educational materials to the public for free, without copyright restrictions. Put simply, our mission is to set music free.
Program accomplishments
- Musopen hosts the largest collection of public domain music recordings in the US.
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
- 20-3177592
- 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
- 2006
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A30)
- Assets (IRS master file)
- $88,435
- Income (IRS master file)
- $98,660
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | December 2025 | – | – | – | IRS |
| 990-EZ | December 2024 | – | – | – | IRS |
| 990-EZ | December 2023 | $76,656 | $85,334 | $32,904 | IRS |
| 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 for 2015 Officer: Aaron Dunn | December 31, 2015 | ≤ $50,000 receipts | – | – | e-Postcard |
990-N: the IRS publishes only the latest e-Postcard per organization; earlier years appear here as 990.tax collects the monthly files. 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.
Questions about MUSOPEN
- What is the EIN of MUSOPEN?
- The employer identification number (EIN) of MUSOPEN is 20-3177592.
- Is MUSOPEN tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2006.
- Are donations to MUSOPEN tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does MUSOPEN 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 MUSOPEN 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 MUSOPEN last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
- Who is the principal officer of MUSOPEN?
- The 990-N for 2015 names Aaron Dunn.
- Who are the officers and directors of MUSOPEN?
- The 990-EZ for the year ended December 31, 2025 lists 1 person; 0 received compensation from the organization.
- How much revenue does MUSOPEN have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $98,660, expenses of $65,303 and total assets of $88,435 at year end.
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All nonprofits in REDWOOD CITY · California · Arts, culture and humanities