Gift tax applies to all irrevocable transfers of interests in tangible or intangible property. Estate tax applies to all property owned in whole or in part by a citizen or resident at the time of his or her death, to the extent of the interest in the property. Generally, all types of property are subject to estate tax. Whether a decedent has sufficient interest in property for the property to be subject to gift or estate tax is determined under applicable state property laws. Certain interests in property that lapse at death (such as life insurance) are included in the taxable estate.