An older homeowner sitting on decades of appreciation, in a primary residence or a former residence now held as a rental, often assumes the choice is between paying tax now or deferring it through an exchange. There is a third path worth weighing first: simply holding the property until death, at which point its basis resets to fair market value for the heirs who inherit it.
That reset is called stepped-up basis, and it applies whether the property was the decedent's home or an investment property held through prior exchanges. Gain that accrued during the decedent's lifetime, including gain that was previously deferred through one or more 1031 exchanges, disappears for income tax purposes. The heirs' basis becomes the property's value on the date of death, not the amount originally paid for it decades earlier.
This changes the math on whether an aging homeowner should sell now, exchange into something else, or simply continue holding. For anyone with a shortened time horizon, holding until death is frequently the most tax-efficient outcome available, and it deserves comparison against any active planning move before that move is made.
When an owner dies holding real estate, the property's basis in the hands of the person who inherits it is generally its fair market value as of the date of death, established through an appraisal or comparable sales analysis, rather than the decedent's original cost plus improvements. If the decedent bought a home for $150,000 and it is worth $700,000 at death, the heir's basis is $700,000, not $150,000.
If the heir sells shortly after inheriting at close to that appraised value, there is little or no taxable gain, even though the decedent would have owed substantial tax had they sold the same property the week before they died. This is the single largest planning lever available to an aging property owner, and it costs nothing to use beyond patience and an accurate appraisal at the time of death.
Deferring gain through a 1031 exchange late in life defers tax that stepped-up basis might have eliminated entirely. An owner who exchanges into a new replacement property shortly before death has simply carried forward a larger deferred gain into the estate, gain that then gets wiped out anyway by the basis reset, with no tax benefit gained from having done the exchange in the first place.
Where a late-life exchange can still make sense is when the owner needs the property to keep generating income or needs to solve a management or diversification problem during their remaining years, not primarily as a tax deferral move. In that case the exchange serves a real living need, and the basis step-up at death is simply a separate benefit that arrives afterward regardless.
In community property states, when one spouse dies, both halves of jointly owned community property can receive a stepped-up basis, not just the deceased spouse's half. This differs from common-law states, where a surviving spouse in joint tenancy typically only gets a step-up on the deceased spouse's fifty percent interest.
For a married couple in a community property state holding a highly appreciated home or converted rental, this double step-up can eliminate essentially all lifetime gain on the property's eventual sale by the surviving spouse, provided the property qualified as community property and the appraisal at the first spouse's death is properly documented.
A surviving spouse who continues living in the home retains access to the Section 121 exclusion on top of whatever step-up in basis applies, and the statute gives a surviving spouse up to two years after a spouse's death to still claim the $500,000 joint exclusion amount rather than dropping immediately to the $250,000 single-filer limit, provided the ownership and use tests were otherwise met.
Combining the step-up with this extended joint exclusion window frequently means a surviving spouse who sells within that period owes little or no federal tax on a home that had accumulated substantial gain over a marriage of many years.
An accurate date-of-death appraisal is the piece of documentation that makes stepped-up basis defensible on a later tax return. Waiting years to establish this value, or relying on a rough estimate, leaves heirs without support if a sale is later questioned. For a property held through one or more prior 1031 exchanges, keeping the chain of Form 8824 filings and closing statements makes reconstructing the deferred-gain history straightforward for whoever settles the estate.
Anyone weighing a late-life exchange, a sale, or simply holding should have this conversation with an estate attorney and tax preparer together, since the estate tax exemption, income tax basis rules, and any state-level estate tax all interact differently depending on the property's value and the owner's overall estate.
