A charitable remainder unitrust (CRUT) is a trust from which a fixed percentage (which is not less than 5 percent nor more than 50 percent) of the net fair market value of its assets, valued annually, is to be paid, not less often than annually, to one or more persons (at least one of which is not a charity and, in the case of individuals, only to an individual who is living at the time of the creation of the trust) for a term of years (not in excess of 20 years) or for the life or lives of such individual or individuals.
Additional contributions to unitrusts may be made if the trust document specifically permits them.
Additionally, the 1997 Taxpayer Relief Act requires that all contributions to a charitable remainder trust after June 18, 1997 must comply with a new rule designed to ensure that the charitable interest is substantial. Specifically, the present value of the charitable remainder interest must be at least ten percent (10%) of the property value transferred to the CRT. This percentage is calculated using the same rules as are used for calculating the income tax charitable deduction.