In 2023, the largest Arizona School Tuition Organizations (STOs) paid more than $5 million to independent vendors, according to federal IRS filings.
| School Tuition Organization | Vendor compensation |
|---|---|
| Arizona Leadership Foundation | $3,170,085 |
| Arizona Christian School Tuition Organization | $1,200,531 |
| School Choice Arizona, Inc. | $376,403 |
| Arizona’s Catholic Tuition Support Organization (ACTSO) | $228,777 |
| Arizona Tuition Connection | $100,000 |
Source: Form 990 federal IRS filings for 2023, the most recent year that tax-exempt organizations filed 990s. STOs that operate outside Arizona or that do not use independent vendors are excluded.