Can I do cost segregation after a 1031 exchange?

Yes. A 1031 replacement property can be evaluated for cost segregation after closing, but the purchase price is not automatically a new depreciable basis. First reconcile the exchanged (carryover) basis, any excess basis, land, prior depreciation, and assets that were not like-kind real property. Under the ordinary depreciation rule, exchanged basis generally continues on its prior schedule while excess basis is treated as newly placed in service; bonus depreciation requires a separate asset- and year-specific test.

If you have closed an exchange and a study proposal assumes the entire replacement price qualifies for first-year bonus depreciation, bring the Form 8824 workpapers, both closing statements, prior fixed-asset schedule, and proposal before filing. AE can review the basis bridge and the election choices together.

The Two Strategies Side by Side

The Recapture Question People Worry About

The common fear is that cost segregation creates Section 1245 personal property, that personal property no longer qualifies for 1031 treatment after the 2017 tax act, and that the accelerated components therefore trigger recapture in an exchange.

Section 1031 now generally applies to real property. The Form 8824 instructions apply the real-property definition in Treasury Regulation 1.1031(a)-3 independently of an asset's depreciation classification. Some Section 1245-classified assets may still be real property for exchange purposes if they meet that definition; a five-year tax life alone does not decide the exchange result.

That distinction does not make movable furniture, appliances, or equipment in a furnished rental like-kind real property. Allocate the relinquished and replacement transactions asset by asset. Personal-property proceeds, cash boot, and debt relief can affect current gain and Section 1245 recapture. Do not assume a fully deferred exchange merely because the deed and qualified-intermediary documents use a single property address.

Which replacement-property basis can a study accelerate?

IRS Publication 551 explains the basis bridge after a like-kind exchange, and Publication 946 describes the depreciation treatment of replacement MACRS property. Start with the relinquished property's adjusted basis, adjust for cash, debt, recognized gain, and exchange expenses, and reconcile the result to Form 8824. Do not use the replacement property's purchase price as its tax basis without that bridge. The ordinary rule in Treasury Regulation 1.168(i)-6 separates:

• Exchanged basis: basis carried from the relinquished MACRS property. Its depreciation generally continues using the relinquished property's remaining recovery period and method under the regulation. A new acquisition date alone does not make that same basis newly eligible for bonus depreciation.
• Excess basis: additional tax basis in the replacement property. The regulation generally treats its depreciable portion as newly placed in service, with the applicable method, recovery period, and convention. A study may identify eligible shorter-life assets within it, but land is not depreciable and bonus still requires the year's Section 168(k) acquisition, use, and property tests.

A study may inspect and classify the whole replacement property as a physical matter; the return cannot simply apply a percentage of the full purchase price to a fresh bonus deduction. The preparer must map the study's component values to the actual tax-basis layers and prior asset schedule. A blanket statement that a study is prohibited on exchanged basis is also too broad: it confuses the study's classification work with the default timing of a new bonus deduction.

Worked example: $3 million price, $1.4 million tax basis

Assume one taxpayer exchanges an investment property worth $2 million with $400,000 adjusted tax basis for a $3 million replacement, contributing $1 million of additional cash. Assume no boot, debt complication, or exchange-cost adjustment. The replacement property's simplified tax basis is $1.4 million: $400,000 exchanged basis plus $1 million excess basis. It is not $3 million merely because that was the closing price.

If a supportable study allocates $240,000 of that $800,000 depreciable excess layer to qualifying shorter-life assets, the $240,000 is a basis classification, not an automatic current deduction. The actual first-year amount depends on each asset's class, bonus eligibility and percentage for its acquisition and placed-in-service dates, elections, business use, and the owner's basis, at-risk, and passive-loss limitations. The $240,000 allocation is an illustration, not an expected reclassification percentage.

Does electing out of the carryover depreciation rule trigger exchange gain?

No, not by itself. Publication 946's election-out discussion says the Treasury Regulation 1.168(i)-6(i) election changes how depreciation is computed but does not change gain or loss recognized on the exchange. The election can alter the depreciation treatment of exchanged and excess basis; the IRS Section 168(k) regulations also address bonus consequences in specific original-use and used-property cases. Do not infer from the election alone that every replacement component receives a fresh bonus deduction. Have the asset classes, acquisition facts, and required election statement reviewed before filing.

When to Choose Cost Segregation Over an Exchange

• You are keeping the property and a supportable study is likely to produce deductions you can currently use
• You can clear the passive loss hurdle through the STR exception or real estate professional status
• The property has meaningful short life content, especially land improvements
• You have income that the relevant basis, at-risk, and passive-loss rules actually allow the deductions to offset

When to Choose the Exchange

• You are selling with a large embedded gain and want to keep the capital working
• Your basis is nearly exhausted after years of depreciation
• You are trading up in size or repositioning into a different market
• You are willing to keep the capital in qualifying investment property; any later basis adjustment at death must be evaluated under the law and ownership facts then in effect

Using Both in Sequence

The two tools can be coordinated, but the return must preserve each property's asset history:

1. Reconcile the original property's basis and any study-identified components to its filed depreciation schedules.
2. Before sale, classify relinquished assets as exchange-eligible real property or non-like-kind personal property; model boot and recapture.
3. Complete the exchange through the proper party and deadlines, then reconcile Form 8824 and both closing statements.
4. Carry forward the old depreciation history and separately analyze the replacement property's excess basis, study scope, bonus eligibility, and any election.
5. Track suspended losses and asset-level basis for the later sale or exchange instead of assuming deferred gain disappears.

Some gain and recapture can be deferred, while non-like-kind property and boot may produce current tax. The most common post-closing error is applying the study's percentages to the $3 million example purchase price rather than the $1.4 million tax-basis bridge. See AE's asset-character guide, 1031 timing guide, and reverse-exchange guide.

The Timeline You Cannot Miss

For a deferred exchange, the taxpayer generally has 45 days from transfer of the relinquished property to identify replacement property and must receive it by the earlier of 180 days or the return due date (including extensions). IRS disaster relief can change a deadline in qualifying cases; do not assume a routine extension does. A qualified intermediary arrangement is commonly used to avoid actual or constructive receipt of proceeds. Form 8824 instructions explain the filing and real-property tests. Once the exchange is complete, the cost-segregation question is a separate basis-and-depreciation review; commissioning a study does not reopen the exchange window.

Documents for a post-exchange return review

• Relinquished and replacement closing statements, exchange agreement, qualified-intermediary settlement ledger, identification notice, and loan payoff or assumption documents.
• Prior Form 8824 drafts, acquisition allocations, fixed-asset ledgers, depreciation schedules, and any earlier cost-segregation study.
• Invoices, appraisal or engineering report for the replacement property, placed-in-service records, personal-property inventories, and business-use records.
• Proposed Section 168(i)-6 election statement, Form 4562 workpapers, passive-loss and at-risk schedules, and state depreciation adjustments.

Failure points before the next return is filed

• Calling the full replacement purchase price new bonus-eligible basis without reconciling Form 8824.
• Ignoring land, cash boot, debt relief, or separately sold furniture and equipment.
• Applying a study percentage to exchanged basis as though the old depreciation schedule vanished.
• Assuming the Section 168(i)-6 election either automatically triggers gain or automatically makes every asset bonus eligible.
• Claiming a large first-year loss without checking owner-level basis, at-risk, and passive-activity limits.

Have the exchange and depreciation workpapers reviewed together before Form 8824, Form 4562, and the owner's return are finalized.

Frequently Asked Questions

Related Reading

• Reverse 1031 Exchange: How It Works
• 1031 Exchange Timing Rules and Mistakes
• Depreciation Recapture Planning
• Section 1245 vs 1250 Recapture
• Cost Segregation Studies for Real Estate Investors
• Bonus Depreciation in 2026
• What Happens to Depreciation When You Sell
• Alternatives to a 1031 Exchange
• Form 3115 Cost Segregation Lookback
• Cost Segregation for Multifamily Properties
• MACRS Depreciation Schedule 2026
• Case Studies: Real Tax Planning Results

Reconcile exchange eligibility with the asset schedule

Section 1031 generally applies to qualifying real property held for investment or business use. A cost segregation asset list does not by itself decide which transferred items meet the exchange definition of real property. Personal property, cash received, liabilities and the exchange structure require review. Coordinate the tax preparer and qualified intermediary before the transfer.

Illustrative decision

A furnished rental sale includes the building and separate furniture. Do not assume every item follows the building into tax-deferred treatment. The parties need a supportable allocation and an exchange analysis under the applicable real-property definitions.

Records and decisions to prepare

• Provide the study and full depreciation register
• Identify each asset transferred
• Review exchange structure before closing
• Track identification and completion deadlines
• Model cash, liabilities and potentially taxable components

Decision guide updated September 26, 2026. AE Tax Advisors Team.

Primary references for this decision:

• IRS Publication 551: basis of assets
• IRS Publication 946: depreciation methods and eligibility
• IRS Publication 544: property dispositions and recapture

Examples illustrate decisions, not guaranteed outcomes. Apply the rules for the relevant tax year and review the underlying facts before filing.

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