26 CFR § 20.2033-1 - Property in which the decedent had an interest.
(a) In general. The gross estate of a decedent who was a citizen or resident of the United States at the time of his death includes under section 2033 the value of all property, whether real or personal, tangible or intangible, and wherever situated, beneficially owned by the decedent at the time of his death. (For certain exceptions in the case of real property situated outside the United States, see paragraphs (a) and (c) of § 20.2031-1.) Real property is included whether it came into the possession and control of the executor or administrator or passed directly to heirs or devisees. Various statutory provisions which exempt bonds, notes, bills, and certificates of indebtedness of the Federal Government or its agencies and the interest thereon from taxation are generally not applicable to the estate tax, since such tax is an excise tax on the transfer of property at death and is not a tax on the property transferred.
(b) Miscellaneous examples. A cemetery lot owned by the decedent is part of his gross estate, but its value is limited to the salable value of that part of the lot which is not designed for the interment of the decedent and the members of his family. Property subject to homestead or other exemptions under local law is included in the gross estate. Notes or other claims held by the decedent are likewise included even though they are cancelled by the decedent's will. Interest and rents accrued at the date of the decedent's death constitute a part of the gross estate. Similarly, dividends which are payable to the decedent or his estate by reason of the fact that on or before the date of the decedent's death he was a stockholder of record (but which have not been collected at death) constitute a part of the gross estate.