The safe harbor. Rev. Proc. 93-27 provides that if a person receives a profits interest "for the provision of services to or for the benefit of a partnership in a partner capacity or in anticipation of being a partner", the IRS "will not treat the receipt of the interest as a taxable event for the partner or the partnership." The IRS described its three exceptions in 2005: the safe harbor does not apply if the profits interest "relates to a substantially certain and predictable stream of income from partnership assets, such as income from high-quality debt securities or a high-quality net lease", if "within two years of receipt, the partner disposes of the profits interest", or if it "is a limited partnership interest in a 'publicly traded partnership'".
Unvested interests. Rev. Proc. 2001-43 extends the safe harbor to an interest that is substantially nonvested when granted. The IRS then treats the holder as receiving the interest on the grant date and will not treat either the grant or the vesting as taxable, provided the partnership and the holder treat the holder as the owner from the grant and the holder reports the distributive share of income, gain, loss, deduction and credit for the whole period; neither the partnership nor any partner deducts the interest's value; and the other conditions of Rev. Proc. 93-27 are met. Taxpayers it covers "need not file an election under section 83(b) of the Code."
Life as a partner. The holder's share of the partnership's income arrives on a Schedule K-1 and is taxable each year whether or not cash is distributed, and its character, ordinary income or capital gain, follows the partnership's own income. A partner's pay for services is handled as a guaranteed payment rather than a wage, and a partner may owe self-employment tax on business income, so an employee who receives a profits interest moves into a different tax and benefits position than a coworker who receives a bonus.
What is unsettled. In 2005 the Treasury and the IRS proposed regulations and a replacement revenue procedure that would change this framework once finalized, and said that until then taxpayers "may continue to rely upon current law, including" Rev. Proc. 93-27 and Rev. Proc. 2001-43. The proposals have not been finalized, so those two revenue procedures remain the guidance. Separately, a profits interest held in connection with services in a business that raises or returns capital and invests in or develops securities, commodities, rental or investment real estate and similar assets is subject to the three-year holding period of section 1061, the rule behind the carried interest debate.