Publication 557
taxmap/pubs/p557-042.htm#en_us_publink1000200462Private foundations are generally not permitted to hold more
than a 20% interest in an unrelated business enterprise. They may be subject to
an excise tax on the amount of any excess business holdings. For purposes of
section 4943, for tax years beginning after August 17, 2006, donor advised funds
and certain supporting organizations are considered private foundations.
taxmap/pubs/p557-042.htm#en_us_publink1000200463In general, a donor advised fund is a fund or account separately
identified by reference to contributions of a donor or donors that is owned and
controlled by a sponsoring organization and for which the donor has or expects
to have advisory privileges concerning the distribution or investment of the
funds.
taxmap/pubs/p557-042.htm#en_us_publink1000200464Only certain supporting organizations are subject to the excess
business holdings tax under section 4943. These include (1) Type III supporting
organizations that are not functionally integrated and (2) Type II supporting
organizations that accept any gift or contribution from a person who by himself
or in connection with a related party controls the supported organization that
the Type II supporting organization supports.
taxmap/pubs/p557-042.htm#en_us_publink1000200465A private foundation that has excess holdings in a business enterprise
may become liable for an excise tax based on the amount of holdings. The initial
tax is 10% (5% for tax years beginning before August 18, 2006) of the value of
the excess holdings and is imposed on the last day of each tax year that ends
during the taxable period. The excess holdings are determined on the day during
the tax year when they were the largest.
If the foundation keeps the excess business holdings after the
initial tax has been imposed, it becomes liable for an additional tax of 200% of
the remaining excess business holdings unless it disposes of them within the
taxable period.
For more information on the tax on excess business holdings,
see the Instructions for Form 4720.