The unlimited marital deduction allows a spouse to give an unlimited amount of property to the other spouse, either as an inter vivos gift or as a transfer from a deceased spouse's estate to the surviving spouse, free of gift or estate taxes. The marital deduction provides support for the surviving spouse by deferring — but not eliminating — the estate tax that may be due on the decedent's property.
The original purpose of the marital deduction was to equalize the treatment of married couples living in community property states and separate property states in regard to gift or estate taxes. Before 1948, for a couple where one spouse made most or all of the money, a couple in a community property state would pay considerably less in estate taxes when the breadwinner died first than a couple in a separate property state, because in a community property state, all of the earnings of the spouse is considered to be community property and owned equally by the 2 spouses, regardless of who actually earned the money. When the breadwinner died in a community property state, only half of the community property would be includable in his estate and subject to estate tax. In a separate property state, the entire breadwinner's property would be included in his estate.
The Revenue Act of 1948 amended the tax code to reduce the tax advantages of a community property state by allowing couples to file joint returns, where the breadwinner could split his earnings with a non-earning spouse, and by allowing a 50% marital deduction where the breadwinner could leave 50% of his property to his spouse free of estate taxes. This eliminated the advantage of community property states over other states with respect to the wealth transference taxes.
With the Economic Recovery Tax Act (ERTA) of 1981, Congress amended the federal estate tax law again by incorporating a new principal – that a married couple should be considered as one economic unit and that, therefore, any transfers of property between them should be free of wealth transfer taxes. The new law provided an unlimited marital deduction for any transfers between spouses, and for transfers from the deceased spouse's estate to the surviving spouse, and also introduced the concept of qualified terminal interest property (QTIP). The unlimited marital deduction would apply to any property where the surviving spouse received at least a life estate in the property.
The marital deduction has 6 requirements:
That the property be includible in the surviving spouse's estate and that the property is held either by a surviving spouse who is a U.S. citizen or by a QDOT comports with the legal objective of the marital deduction, which is to delay, but not eliminate, the estate tax on the property. The United States citizenship requirement was predicated on the belief that if the surviving spouse is a foreigner, then the property may not be includible in her estate if she dies in another country. Nonetheless, there is a marital deduction for noncitizen spouses that is limited to $134,000 per year, which is adjusted annually for inflation using the same rules used to adjust the annual exclusion for the gift tax but where the amounts are multiplied by 10. IRC §2523(i)
The nondeductible terminal interest rule basically states that there can be no contingency that would allow the property to pass to someone other than the surviving spouse or her estate. However, there are 5 exceptions to this rule:
Estate trusts are a special type of marital deduction trust where, when the surviving spouse dies, all remaining trust principal must go into the surviving spouse's estate, allowing the surviving spouse to choose the final beneficiaries. This type of trust is used to hold non-income producing property, such as a business, where the income must be reinvested or to hold real estate that does not currently earn income, but is being held for appreciation. The surviving spouse cannot demand that the trust assets be sold for income producing property. And when it does produce income, it does not have to be paid to the spouse. At the trustee's option, the income can be accumulated. Although the trust income is taxed at a higher rate than it is for individuals, the trustee can grow the business by reinvesting the income.
Most wills and trust documents have provisions that require beneficiaries to survive the donor of the property by a specified amount of time, usually 30 to 60 days. For the marital deduction to apply to the property, IRS rules require that the survivorship provision must be for no longer than 6 months and the surviving spouse must actually survive the contingency period. If the surviving spouse does not actually survive long enough to satisfy the contingency, then the property never actually passes to her and the marital deduction will not be applicable.
A life estate plus power of appointment (aka marital deduction power of appointment trust) will qualify for the marital deduction if the spouse has the right to appoint the trust corpus to herself or to her estate. However, the following requirements must be satisfied: §2056(b)(5)
Life insurance with power of appointment has similar rules to the life estate exception that applies to the proceeds of life insurance, endowments, or annuity contracts. §2056(b)(6)
Both power-of-appointment exceptions apply because the surviving spouse can appoint the property to others who are not creditors of the spouse.
The final exception is for qualified terminal interest property (QTIP), which gives the surviving spouse unrestricted power over the property but the beneficiaries of the qualified terminal interest cannot be changed. The QTIP is most often used when the donor has children from a previous marriage or if there is a good possibility that the surviving spouse will remarry and favor the new spouse or additional children.