As defined by Title 26 of the United States Code of Federal Regulations § 1.642(c)-5 and the Internal Revenue Code section 691, the income in respect of a decedent (IRD) is "all income the decedent would have received had death not occurred that wasn't properly includible on the final tax return".Publication 559 (2024), Survivors, Executors, and Administrators§ 1.691(a)-1 Income in respect of a decedent. It is payable to decedent’s estate, trusts, or individual beneficiaries after decedent's death. These are includible in the decedent’s estate for federal estate tax purposes and is often a reason of misunderstanding or oversight.Margaret Van Houten, Dentons Davis Brown, INCOME IN RESPECT OF A DECEDENT IRC Section 691
Common IRD assets are IRA bequests.3.2.3 Bequests of IRAs and Other IRD Assets References