The decedent created two irrevocable charitable remainder trusts during his life, one for each of his sons. The decedent was the income beneficiary during his life, with each son then being the beneficiary of that son's trust. The amount paid to the decedent during life and each son after the decedent's death, was the lesser of the net trust accounting income for the tax year or 11% of the net value of the trust assets for trust one or 10% for trust two. If trust income exceeded the fixed percentage for that trust, the trustee was directed to make additional distributions to make up for prior years when the trust income was insufficient to satisfy a distribution of the fixed percentage for that particular trust (hence, the trusts were a "net income with makeup charitable remainder unitrust" - NIMCRUT). The payout period was the latter of 20 years from the time of creation of the trusts or the date of death of the last beneficiary to die. The decedent died about one year after creating the trusts, and his estate reduced the taxable value of the estate by the amount it deemed to be charitable (note - the estate did not claim a charitable deduction). The IRS denied the deduction because the trusts did not satisfy the requirement that the value of the charitable remainder interest be at least 10% of the net fair market value of the property contributed to the trust on the date of the contribution as required by I.R.C. Sec. 664(d)(2)(D). The estate claimed that it was entitled to a charitable deduction under I.R.C. Sec. 664(e) because the distributions were to be determined according to the applicable I.R.C. Sec. 7520 rate so long as the rate is above 5%. The court determined that I.R.C. Sec. 664(e) was ambiguous, but that the legislative history supported the IRS position that the value of a remainder interest in a NIMCRUT is to be based on the fixed percentage stated in the trust instrument. As such, the trusts failed the 10% test. The court also noted that the IRS regulations on the matter were not helpful. Schaefer v. Comr., 145 T.C. No. 4 (2015).