The Good Outcome: Dying After the Exchange Closes
If you complete a 1031 exchange and later die while still holding the replacement property, your heirs receive it with a stepped-up basis equal to its fair market value on your date of death. Under IRC Section 1014, this reset can eliminate the deferred gain entirely, along with any depreciation recapture built into the property.
This is the strategy real estate investors call “swap till you drop.” Keep exchanging into new property instead of ever selling for cash, and the tax bill you have been deferring for years can simply disappear at death.
Here is what that actually looks like in dollars. Say you bought a commercial building for $1,000,000 in 2011, with $750,000 allocated to the building and $250,000 to land. Straight-line depreciation on the building runs about $19,231 a year. After 15 years, that is $288,465 in total depreciation claimed.
If you sold that property during your lifetime for $1,500,000, part of your gain would be taxed as unrecaptured Section 1250 gain, the portion tied to depreciation you already deducted. That gain is capped at a 25% federal rate instead of the lower long-term capital gains rate. On this example, that piece alone runs about $72,116, on top of ordinary capital gains tax, net investment income tax, and Georgia income tax. Total lifetime tax on a sale like this can run $245,000 or more.
If you hold the property until death instead, all of that disappears. The $72,116 in depreciation recapture, gone. The remaining capital gains tax, gone. Your heirs’ basis resets to the property’s fair market value on your date of death, as if the depreciation never happened for tax purposes.
This also applies if you used a cost segregation study to accelerate depreciation on components like lighting, HVAC, or paving. Cost segregation increases your deductions during life, and it increases your recapture exposure if you sell. The step-up at death erases that exposure too.
The Bad Outcome: Dying Before the Exchange Closes
If you die while an exchange is still in progress, before the replacement property closes, the outcome flips. The exchange can be terminated, and the gain you deferred becomes taxable to your estate, sometimes all at once.
The step-up in basis still applies to whatever the estate ends up holding, but it cannot undo a gain that was already recognized when the exchange fell apart. The difference between these two outcomes can be hundreds of thousands of dollars, and it comes down entirely to whether you were alive when the deal closed.
Why the 45-Day and 180-Day Deadlines Do Not Wait for Probate
A 1031 exchange runs on two fixed deadlines: 45 days to identify a replacement property, and 180 days to close on it. Both run from the sale of the original property, and neither one extends because the investor died.
Probate, by contrast, often takes 9 to 18 months before an executor even has authority to act. An exchange deadline can, and often will, arrive long before that authority does.
Who Actually Has Authority to Instruct the Qualified Intermediary
The funds from an exchange sit with a qualified intermediary, who needs instructions from someone with legal authority to keep the exchange moving. If nobody has that authority when a deadline hits, the intermediary has little choice but to treat the exchange as abandoned and return the funds, triggering the taxable gain.
This is the same authority gap that runs through every part of an estate plan, applied to one of the least forgiving deadlines an investor will ever face.
Why a Funded Trust Is the Only Real Fix for This Timing Problem
If the property being exchanged sits in a funded revocable trust, your successor trustee has authority the same day you die or become incapacitated. They can instruct the qualified intermediary, meet the identification deadline, and close on time, without ever touching probate.
This is the same Day-1 authority principle behind how a successor trustee takes over rental properties in general, applied to a deadline that genuinely cannot wait.
How to Protect an Exchange That Is Already in Progress
None of this requires guessing which outcome you might face. It requires making sure someone can act before either deadline arrives.
1
Confirm the exchanged property is titled in your trust
This is what lets your successor trustee step in with immediate authority if something happens mid-exchange.
2
Give your qualified intermediary the trust’s information
Make sure the intermediary has your successor trustee’s contact information on file, not just yours, before an exchange even begins.
3
Track every open exchange’s deadlines in one place
List the 45-day and 180-day dates for any exchange in progress, so a successor is not discovering deadlines after the fact.
4
Review this every time you start a new exchange
Each new exchange resets the clock. Confirm your trust and successor are ready before you start the next one, not after.
Done right, timing works in your family’s favor no matter when the unexpected happens. The step-up in basis does its job, and no deadline is ever left with nobody to answer for it.
