Generation skipping transfer tax is a federal transfer tax that is assessed on an individual who transfers assets to a "skip person" during life or by will. This tax is assessed in addition to gift or estate tax. Its purpose is to prevent donors from avoiding transfer taxation in one generation by giving assets directly to the next generation.

A flip charitable remainder unitrust with a makeup provision ("unitrust”) is a gift plan defined by federal tax law that allows a donor to provide income to herself and/or others while making a generous gift to charity. The income may continue for the lifetimes of the beneficiaries, a fixed term of not more than 20 years, or a combination of the two.

The remainderman is the recipient of a trust's proceeds when the trust terminates.

In the context of planned giving, remainderman usually refers to the charity that will receive the final distribution from a charitable remainder trust or pooled income fund. Technically speaking, gift annuity and retained life estate gifts do not have a remainderman because the charity takes possession of the gift assets immediately.

The remainder factor is the fraction of the funding amount of a planned gift that is considered a charitable contribution, expressed as a decimal. The remainder factor multiplied by the funding amount equals the value of the charitable contribution.

For example, if the remainder factor for a charitable remainder unitrust is .24561 and the unitrust is funded with $100,000, the value of the charitable contribution is .24561 x $100,000 or $24,561.