Reasons for Form 4720 Filings by Taxable Activity, 2003–2005 (% of filings)
| Taxable Activity | 2003 (%) | 2004 (%) | 2005 (%) |
|---|---|---|---|
| Self-dealing | 7 | 8 | 9 |
| Undistributed income | 90 | 88 | 87 |
| Taxable expenditures | 3 | 3 | 3 |
| Excess business holdings | 1 | 1 | 1 |
While US public charities, like Kaiser Foundation Hospitals, must file Form 990 yearly with the IRS, private foundations, such as the Gordon and Betty Moore foundation, must file a different form, 990-PF. In addition, foundations that engage in certain prohibited activities must also file Form 4720 and pay a penalty tax on the money involved. Private foundations are prohibited from holding excess interests in a business enterprise, “self-dealing” (conducting activities that benefit foundation insiders), making taxable expenditures such as grants to non-charitable entities, and failing to cross a required threshold in making charitable distributions from income. Out of the organizations that filed Form 990-PF in the years 2003–2005,