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Audit support includedFlat price for every study3 to 5 business days A cost segregation study and a 1031 exchange can be combined on residential rental property, but the personal property a study reclassifies (the 5-year and 15-year buckets) doesn't qualify for like-kind deferral under current law. Since the Tax Cuts and Jobs Act eliminated personal property exchanges in 2018, only the real property portion of a sale carries forward tax-deferred, and any depreciation already claimed on personal property assets gets recaptured in the year the exchange closes. Most residential rental investors who want both benefits run cost segregation on the replacement property after closing, not on the relinquished property before the sale.
- Cost segregation and 1031 exchange residential rental property strategies combine, but only real property defers tax under a 1031.
- Personal property reclassified by cost segregation (5-year and 7-year assets) doesn't ride along in a 1031 exchange after the 2018 TCJA change.
- Running cost segregation on the replacement property after closing usually beats running it on the relinquished property first.
- 100% bonus depreciation applies to qualifying property acquired and placed in service after January 19, 2025 under the OBBBA.
- Section 1250 recapture caps at 25%; Section 1245 recapture on personal property hits ordinary rates up to 37%.
Why This Matters
Investors chase both strategies for the same reason: they want to defer capital gains on a sale and still accelerate depreciation on the property they end up owning. The two tools were built for different jobs, though. A 1031 exchange defers gain on real property. A cost segregation study accelerates depreciation by pulling components out of the standard 27.5-year residential schedule into 5-year, 7-year, and 15-year buckets.
When you stack cost segregation and a 1031 exchange on residential rental property, the order matters more than most investors expect going into 2026. Get the sequencing wrong and you can trigger a recapture bill in the same year you thought you were deferring everything.
Combining Cost Segregation and a 1031 Exchange: How the Timing Works
The table below breaks down what happens under each sequencing approach. "Defers" means the gain rolls into the replacement property's basis. "Recognized now" means it's taxable in the year of the exchange.
| Approach | What defers | What's recognized now | Best for |
|---|---|---|---|
| Cost segregation only, no sale | Nothing yet, you still own the property | Nothing, recapture waits until sale | Owners planning to hold for years. Buy. |
| 1031 exchange only, no prior study | Real property gain, in full | Nothing if fully reinvested | Owners rotating equity without a study on the books. Buy. |
| Cost segregation years ago, then 1031 on the same property | Real property (Section 1250) portion | Personal property (Section 1245) depreciation recapture | Owners exchanging a property they already studied. Proceed with caution. |
| 1031 first, cost segregation on the replacement property | Real property gain rolls into new basis | Nothing immediately; fresh 5/7/15-year schedule starts | Owners trading up who want a new depreciation runway. Buy. |
The fourth row is the sequencing most CPAs recommend for residential rental owners in 2026: close the exchange first, then order a cost segregation study for the 1031 exchange replacement property once it's in service.
100% Bonus Depreciation After January 19, 2025: What It Means for Your Exchange
Under the One Big Beautiful Bill Act, bonus depreciation was restored to 100% for qualifying property acquired and placed in service after January 19, 2025. That matters directly for this strategy: if you complete a 1031 exchange and then order a cost segregation study on the replacement property, the 5-year, 7-year, and 15-year assets identified in that study are eligible for full first-year expensing under the restored rate, not the phased-down percentages that applied in prior years.
A rental placed in service anytime in 2026 qualifies for the 100% rate as long as it meets the OBBBA's placed-in-service window. That's the single biggest reason the "exchange first, study second" sequence has become the default recommendation heading into 2026.
25% Reclassification: The Recapture Exposure a 1031 Doesn't Erase
Here's a simple example. Say a cost segregation study reclassifies 25% of a property's value into short-life personal property and land improvements, a common allocation for furnished short-term rentals. The owner is a high W-2 earner in the 37% bracket. Years later, they sell and roll the proceeds into a 1031 exchange without ordering a second study first.
The 75% of value that's real property (Section 1250) defers under the exchange, assuming full reinvestment of equity and debt. The 25% that was reclassified as personal property (Section 1245) does not defer. Because personal property exchanges were eliminated by the TCJA effective 2018, that portion's accumulated depreciation is recaptured as ordinary income in the year the exchange closes, taxed at rates up to 37% for that investor.
This is the caveat most articles about combining these two strategies skip. A 1031 exchange doesn't erase the recapture exposure a prior cost segregation study created; it just isolates which slice of the gain gets deferred.
Section 1250 vs Section 1245 Recapture: Why the Distinction Decides Your Tax Bill
Section 1250 governs real property, the building shell and structural components. Depreciation recapture on that portion, when it applies, is capped at a maximum rate of 25% under unrecaptured Section 1250 gain rules. Section 1245 governs the personal property and land improvements a cost segregation study identifies, and recapture on that portion is taxed as ordinary income, which can run as high as 37% for top-bracket owners.
That's a real spread. The Section 1250 recapture tax rate applies only to the real property share, so keeping personal property out of a 1031 by sequencing the cost segregation study after the exchange avoids the higher ordinary-income hit entirely.
“Personal property doesn't ride along in a 1031 exchange anymore, only real property does.”
Why the Recapture Math Varies
The numbers above are illustrative. Actual recapture exposure on any specific residential rental property depends on:
- Property type mix: how much of the reclassified value sits in 5-year personal property versus 15-year land improvements.
- Placed-in-service date: whether the property qualifies for the 100% rate under the OBBBA or an older bonus depreciation percentage.
- Exchange structure: a forward exchange and a reverse 1031 exchange recognize gain on different timelines.
- Time since the original study: an older cost segregation study has less remaining undepreciated basis left to recapture.
- State conformity: some states don't fully conform to federal bonus depreciation or 1031 treatment, which changes the state-level bill even when the federal numbers match.
- Whether the replacement property also gets studied: ordering a new study resets the short-life depreciation clock and creates a fresh deduction instead of carrying forward recapture exposure.
A CPA reviewing the actual purchase price allocation, prior depreciation schedules, and exchange documents is the only way to get a real number for a specific property. The ranges above are for planning purposes, not a guarantee of any particular outcome.
Plan the sequencing before you exchange
See how a residential cost segregation study fits your 1031 timeline.
Does depreciation recapture apply if you do a 1031 exchange?
Depreciation recapture applies to the personal property share of any prior cost segregation study, even inside a 1031 exchange, because only real property qualifies for like-kind deferral since 2018. The real property gain can defer in full if the exchange is structured correctly, but the personal property portion is recognized and taxed as ordinary income the year the exchange closes.
Can you run a cost segregation study on a 1031 exchange replacement property?
Yes, running a cost segregation study on the replacement property after a 1031 exchange closes is the more common sequencing for residential rental owners in 2026. It gives you a fresh 5, 7, and 15-year depreciation schedule on the new property without touching the deferred gain from the relinquished property.
Should you order cost segregation before or after a 1031 exchange?
Order it after, on the replacement property, in most residential rental situations, since studying the relinquished property first only creates personal property recapture exposure at closing. The exception is a property you plan to hold indefinitely with no exchange on the horizon, where timing shifts to year-end planning instead.
FAQ
Is cost segregation worth it before a 1031 exchange?
Ordering cost segregation before a 1031 exchange on the same property usually creates Section 1245 recapture at closing, so most CPAs recommend waiting until after the exchange and studying the replacement property instead.
How does bonus depreciation affect a 1031 exchange in 2026?
Bonus depreciation runs at 100% for qualifying property acquired and placed in service after January 19, 2025 under the OBBBA, so a cost segregation study on a 1031 exchange replacement property placed in service in 2026 gets full first-year expensing on eligible assets.
Can you 1031 exchange a short-term rental property?
A short-term rental can qualify for a 1031 exchange if it's held for investment or business use rather than primarily personal enjoyment, which is a separate question from whether a cost segregation study on it triggers recapture.
Does a reverse 1031 exchange change cost segregation timing?
A reverse 1031 exchange changes which property closes first, so the recommended sequence is still to order the cost segregation study on the property you end up holding, after the exchange structure settles.
Do land improvements from cost segregation qualify for 1031 like-kind treatment?
Land improvements identified by a cost segregation study are personal property for exchange purposes, so they do not qualify for 1031 like-kind deferral and their depreciation is recaptured at the time of a taxable disposition.
How much of a property's value typically gets reclassified in a cost segregation study?
A cost segregation study on a residential rental typically reclassifies 20% to 45% of the property's value into shorter recovery periods, though the exact share depends on the property's finishes, furnishings, and site improvements.
What happens to unrecaptured depreciation in a 1031 exchange?
Unrecaptured Section 1250 gain on the real property portion generally defers along with the rest of the exchange if the transaction is structured correctly, while personal property depreciation recapture does not defer under current law.
One Last Thing
The detail most investors miss isn't the recapture rate, it's the timing window. If you're planning a 1031 exchange in 2026 and you already ran a cost segregation study on the relinquished property years ago, get the remaining depreciation schedule reviewed before you list the property, not after you're under contract. Knowing the personal property basis ahead of time lets your CPA model the recapture hit before you're locked into exchange deadlines with no room to adjust.
