Federal estate-tax exposure begins at a much higher level for deaths in 2026: the IRS lists a $15 million basic exclusion amount. The threshold means most estates will not owe federal estate tax, but it does not make estate administration optional or eliminate state death taxes. It also does not tell a married couple how much exemption is actually preserved, because lifetime gifts, portability elections and ownership structure can change the amount available at death.
The $15 million test starts with the gross estate
The IRS’s current estate-tax page states that Form 706 is generally required when the gross estate plus adjusted taxable gifts exceeds $15 million for a person who dies in 2026. The gross estate can include cash, securities, real estate, business interests, retirement accounts, life insurance controlled by the decedent and other property. Probate labels do not decide what enters the federal calculation.
The IRS estate-tax calculation then applies deductions and credits, including qualifying transfers to a surviving spouse or charity and certain administration costs. That means the filing threshold and taxable estate are related but not identical. An estate may cross the gross-value test and ultimately owe little or no tax, while the return still performs important work by documenting deductions, valuations and elections that affect the survivor.
Lifetime taxable gifts also matter because they consume part of the unified gift-and-estate exemption. A person who used several million dollars of exemption during life does not receive a fresh $15 million at death. Prior gift-tax returns become part of the estate record, and inconsistent valuations can create problems years after the transfer. The current threshold is therefore the top of a lifetime ledger, not simply a snapshot of property owned on the last day.
The IRS estate-tax questions also distinguish the estate’s value from the executor’s payment and filing duties. Executors may need an employer identification number, asset appraisals and account transcripts before a return can be completed. These administrative facts can control access to property and closing timelines even when deductions ultimately reduce the taxable amount below the level that produces tax.
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Portability can preserve a deceased spouse’s unused exemption
A surviving spouse may receive the deceased spouse’s unused exclusion through a portability election, but the election generally requires a timely and properly prepared estate-tax return. The ability to move unused exemption can be valuable even when the first spouse’s estate is far below $15 million. Future asset growth, business appreciation or an inheritance can make an election that once appeared unnecessary financially important.
Form 706 is generally due nine months after death, with extension procedures available. The filing involves more than listing account balances. Closely held companies, real estate and unusual property may require qualified appraisals, while deductions need support. A portability return can therefore create professional costs for an estate that owes no tax, producing a real tradeoff between present administration expense and preserving future exemption flexibility.
Portability does not replace every trust or ownership decision. It generally preserves federal exemption, but it does not shelter later appreciation inside the deceased spouse’s unused amount in the same manner as some trust structures, and it may not solve state estate-tax exposure. The election is one tool inside an estate plan rather than evidence that a $30 million married-couple shelter happens automatically without documentation.
State taxes and income-tax basis remain separate problems
Several states and the District of Columbia impose estate or inheritance taxes with thresholds and beneficiary rules far below the federal line. A household can be comfortably under $15 million and still face a state filing or tax. Residency, property location and the type of beneficiary can control that result. The federal threshold should therefore never be used as proof that death taxes are irrelevant to a particular estate.
Income-tax basis can matter to far more families than estate tax. Appreciated property included in an estate often receives a basis tied to date-of-death value, while gifted property generally carries the donor’s basis. Transferring assets merely to shrink an estate that is already below the federal threshold can create future capital gains without producing estate-tax savings. Valuation and basis consequences belong in the same decision even though they appear on different tax returns.
The threshold also does not remove ordinary estate-planning needs such as beneficiary designations, incapacity documents, liquidity for expenses and authority over digital or business assets. Those issues determine how efficiently wealth moves even when no federal return is required. An estate plan built only around avoiding a tax that most households will never owe can miss the costs, delays and family disputes that occur below the $15 million line.
The IRS figure is best read as a federal filing boundary for 2026 deaths, adjusted by lifetime taxable gifts and potentially expanded for a surviving spouse through a valid election. It narrows the population exposed to federal estate tax, but it leaves state tax, basis, liquidity and administration intact. The number is large; the planning consequences outside it remain larger and affect many more estates.
This article was created with AI assistance and reviewed against current Internal Revenue Service estate-tax records.
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