Tax Forms & Financials
IOSA has been part of this community since 1985, and we want our finances to be easy to see. Everything below is free to view and download. If you have questions, call 360-468-3441 or email info@iosaonline.org.
Tax-exempt status
IOSA is a 501(c)(3) nonprofit, EIN 91-1326241. Gifts made on or after February 6, 2025 are tax deductible to the extent allowed by law. Before 2025, IOSA was a 501(c)(4) nonprofit.
Our form 1023 Application is available upon request. Email info@iosaonilne.org
IRS Form 990
2024 Form 990 (coming November 2026, delayed by an IRS records error that has been corrected.)
Audited financial statements
Where our funding comes from
IOSA is funded by San Juan County, the Washington State Department of Ecology, local refineries, foundations, and island residents.
More about IOSA