Like Kind Exchange Wrinkle With Cost Segregation

By Jason Watson, CPA
Posted Thursday, July 16, 2026

With the Tax Cuts and Jobs Act, IRC Section 1031 was generally limited to exchanges of real property. Personal property no longer gets its own tax-deferred exchange treatment.

Why do you care? With many real estate transactions, personal property transfers along with the real estate. Furniture, televisions, movable appliances and similar items are easy examples. However, a cost segregation study can also create several Section 1245 buckets within what normal humans would otherwise view as one big piece of real estate.

Most humans. Or mostly normal humans. We all know a few.

Let’s say you bought a $500,000 short-term rental, and the cost segregation report identified $80,000 of 5-, 7- and 15-year property. Naturally, you accelerated depreciation with bonus depreciation. Later, you enter into a Section 1031 like-kind exchange involving another investment property. Neat.

Before calculating the tax consequences, you need to separate three concepts that are often mashed together:

• Section 1250 real property.
• Section 1245 property that also qualifies as real property for Section 1031.
• Section 1245 personal property that does not qualify as real property for Section 1031.

These classifications overlap, but they are not synonymous.

True Personal Property

Let’s start with the easy stuff. Furniture, televisions, movable appliances and similar items are generally personal property and are no longer eligible for Section 1031 nonrecognition.

Suppose $20,000 of the $80,000 cost segregation allocation relates to furniture and movable appliances. You fully depreciated those items, leaving a zero adjusted tax basis. At the time of the exchange, their fair market value is $8,000, resulting in an $8,000 gain.

Since the property was previously depreciated under Section 1245, the $8,000 gain would generally be ordinary income depreciation recapture. And no, we cannot pretend the property is collectively worth $38 because that produces a better tax result.

These items can be separately listed and depreciated based on their actual cost. Keeping them separate also makes the eventual disposition cleaner because you can identify the original cost, accumulated depreciation, adjusted tax basis and fair market value without reverse-engineering those amounts from a broader cost segregation allocation.

Keep Obvious Personal Property Separate

A bit of a long sidebar here. We generally recommend keeping furniture, televisions, freestanding appliances and other separately identifiable personal property out of the cost segregation study.

You do not need an engineer to tell you that a sofa is not part of the building. More importantly, you do not want the sofa buried inside a larger Section 1245 allocation when the property is eventually sold or exchanged.

A cost segregation study often identifies several categories of Section 1245 property. Some assets are clearly personal property, while others might remain Section 1245 property for depreciation and recapture purposes but also qualify as real property under the Section 1031 rules.

Those are very different disposition problems.

At sale or exchange, you do not have to pull furniture, televisions and freestanding appliances back out of a broader cost segregation category years later. This separation also keeps the cost segregation report focused on the more difficult assets that require a separate Section 1031 real-property analysis.

Keeping the easy personal property separate allows everyone to spend their time on the assets that actually require judgment. It also reduces the risk that furniture and appliances become mixed into an allocation intended to support the treatment of wiring, plumbing, ducting and other integrated building components.

Clean records going in usually mean cleaner tax calculations coming out.

Section 1250 Land Improvements

Now consider another portion of the $80,000 cost segregation allocation. Let’s say $25,000 relates to 15-year land improvements such as driveways, landscaping, drainage, sidewalks, fencing or similar improvements connected to the rental property.

For a typical rental property, these assets are generally Section 1250 property, not Section 1245 property. That can work in your favor during a Section 1031 exchange.

Why? Because these land improvements are generally real property. They can usually participate in the exchange along with the building and land, and some or all of the gain recognition and depreciation recapture concern might remain deferred when sufficient replacement Section 1250 property is received.

This can give you the best of both worlds: accelerated depreciation now and potentially delayed gain recognition later. As Van Halen would sing. Yes, we are counting the Sammy era.

Section 1245 Does Not Always Mean Personal Property

Now let’s deal with the remaining $35,000 from the cost segregation study. In our example, this amount is 5-year and 7-year Section 1245 property.

It is tempting to say that all Section 1245 property is personal property and therefore cannot qualify for Section 1031 nonrecognition. That is not quite right.

An asset can be Section 1245 property for depreciation and recapture purposes while also qualifying as real property for Section 1031 purposes. Whoa! Different tax rules. Different definitions. Different headaches. But this is good!

Treasury Regulations Section 1.1031(a)-3 provides the special definition of real property for a like-kind exchange. Generally, tangible property can qualify as real property if:

• It is classified as real property under the state or local law where the property is located.
• It is specifically listed as real property in the Section 1031 regulations.
• It qualifies as an inherently permanent structure or as a structural component of one based on the facts and circumstances.

Each distinct asset is analyzed separately. Yes, that can be a pain, but a good previous cost segregation report should provide a useful rubric. Unless you bought the report from a Cracker Jack box. See our Cost Segregation Summary section for some referrals.

An inherently permanent structure is generally property that is permanently affixed to real property and ordinarily expected to remain in place for an indefinite period. For assets that are not specifically listed, the regulations consider factors such as how the asset is affixed, whether it was designed to remain in place, the damage removal would cause, the time and expense required for removal, and the parties’ circumstances.

This all makes sense, right? Sure.

For a rental property, this might include odd-duck items such as:

• Dedicated electrical wiring.
• Appliance branch circuits.
• Outlet receptacles.
• Fixed dryer vent ducting.
• Gas supply piping and connectors.
• Water lines and drain lines.
• Specialty plumbing connections.
• Hardwired specialty lighting.
• Other integrated building components.

Some of these assets might remain Section 1245 property for depreciation and recapture purposes while still qualifying as real property for Section 1031. Others might not. The cost segregation label starts the conversation. It does not finish it.

Conversely, some assets might appear attached to the building but still fail the Section 1031 real-property definition. Depending on the facts, this could include window treatments, removable closet shelving and organizer systems, certain decorative light fixtures, ceiling fans, garage storage systems, modular cabinetry or other removable components.

The question is not simply whether something is attached. The question is whether it qualifies as real property under the Section 1031 regulations.

The current Form 8824 instructions illustrate the result where Section 1245 assets also qualify as real property for Section 1031. However, even when those assets qualify for Section 1031 nonrecognition, the Section 1245 recapture analysis does not disappear.

And we burst that bubble next.

Section 1245 Recapture Can Still Sneak In

IRC Section 1245(b)(4) provides a special limitation for like-kind exchanges. In simplified terms, the amount of Section 1245 recapture recognized cannot exceed:

• The gain otherwise recognized in the exchange, plus
• The fair market value of replacement property received that is not Section 1245 property.

Why does the second item matter? Because the tax code generally does not want fully depreciated Section 1245 property disappearing into the replacement Section 1250 property ether without preserving the potential ordinary income recapture down the road. Said differently, the IRS does not want you to Shawshank Redemption your Section 1245 property as you daisy-chain a bunch of Section 1031 exchanges together. Did we lose you on that one?

The current Form 8824 instructions provide an example where a taxpayer relinquishes $55,000 of Section 1245 property that also qualifies as real property for Section 1031. The taxpayer previously claimed $35,000 of depreciation on those assets.

However, the replacement real property contains no Section 1245 property. Since the relinquished Section 1245 assets have a fair market value of $55,000, in the IRS example, and a zero adjusted basis, there is enough gain to recapture the full $35,000 of prior depreciation.

Yuck.

Said differently, the taxpayer received only Section 1250 replacement property. There was no replacement Section 1245 property to continue carrying the old recapture potential.

Replacement Section 1245 Property

The result can be different when the replacement property also contains Section 1245 real property.

Suppose the relinquished rental includes Section 1245 property that also qualifies as real property under Section 1031, such as the odd-duck electrical wiring, appliance branch circuits, gas supply piping, fixed dryer vent ducting and similar integrated components discussed just a bit ago.

The replacement rental also includes qualifying Section 1245 real property.

In that situation, some or all of the Section 1245 recapture potential might remain deferred because the replacement Section 1245 property can continue carrying that potential. The exact calculation depends on the gain otherwise recognized, the fair market value and tax classification of the replacement assets, and the amount of prior depreciation.

This is why a cost segregation study on the relinquished property is not always enough. You might also need an allocation or cost segregation analysis for the replacement property to determine what type of property was received. Read that again.

You might need a preliminary cost segregation analysis, engineering review or another defensible allocation before buying the replacement property, even if you do not intend to accelerate its depreciation. Otherwise, you know what went out the door but not what is coming back through it.

A tough way to plan an exchange.

Incidental Personal Property

The Section 1031 regulations contain two related 15% rules concerning personal property received with replacement real estate. They are often conflated.

One rule simplifies the replacement-property identification requirements. Incidental personal property generally does not have to be treated as a separate identified property when it is normally transferred with the larger real property and its aggregate fair market value does not exceed 15% of the larger property’s fair market value. Identification is a formal process within a 1031 like-kind exchange.

The other rule protects the qualified-intermediary safe harbor when the QI uses exchange proceeds, as directed by you, to acquire incidental personal property along with the replacement real estate.

For example, suppose the replacement real property has a fair market value of $800,000. Fifteen percent is $120,000. Personal property received with the real estate might qualify as incidental if its aggregate fair market value does not exceed $120,000 and that type of property is normally transferred with the real estate in standard commercial transactions.

However, incidental does not mean exchange eligible.

The rules do not convert personal property into real property. They do not eliminate gain recognition. They do not eliminate Section 1245 depreciation recapture. They simply make the identification and qualified-intermediary mechanics easier.

Sidebar: Keep in mind that since Tax Cuts and Jobs Act of 2017, personal property cannot be like-kind exchanged. What the regulations allow us to do is identify Section1245 property as real property to exchange purposes.

If the personal property exceeds 15%, the real estate exchange does not automatically fail. However, you, the real estate investor, are outside those specific incidental-property protections, and the identification and qualified-intermediary mechanics require closer attention.

Also, the 15% calculation applies to personal property received with the replacement real estate. It does not provide a 15% free pass for personal property transferred with the relinquished property.

Said another way, you cannot simply conflate the incidental-property exception as cover for Section 1245 personal property you sold.

Who Drives the Exchange Bus?

A good QI might flag a significant personal-property component, request an allocation or ask how the property should be described in the exchange documents. However, the QI generally does not perform a cost segregation study, determine whether each asset is Section 1245 or Section 1250 property, calculate depreciation recapture, or prepare Form 8824. Many QIs specifically state that they do not provide tax, legal or valuation advice. They punt which is understandable.

Therefore, you, your real estate CPA and any cost segregation or valuation professionals generally must determine:

• The classifications and values of the relinquished assets.
• The classifications and values of the replacement assets.
• Whether Section 1245 assets also qualify as real property under Section 1031.
• How much Section 1245 recapture must be recognized.

The QI administers the exchange. The tax advisor calculates what the exchange means.

See our Selling Your Rental Property: The Allocation Game section.

Step-by-Step Process for Cost Segregation and Section 1031

This is the practical workflow as you look to do a 1031 exchange on a rental property that had a cost segregation study performed.

Step 1: Determine the Total Amount Realized

Start with the selling price of the relinquished rental property and account for debt, cash, selling expenses and other exchange adjustments.

Step 2: Allocate the Current Value of the Relinquished Property

For exchanges completed after 2017, Section 1031 applies to real property only, so this split matters more than it used to. Section 1245 assets that count as real property under the Section 1031 regulations can still ride along in the exchange, while Section 1245 personal property cannot. Use the prior cost segregation study, current fixed-asset records and a reasonable valuation method to allocate the relinquished property’s current fair market value among:

• Section 1250 real property.
• Section 1245 property that also qualifies as real property under Section 1031.
• Section 1245 personal property that does not qualify as real property under Section 1031.

The old cost segregation study helps identify the assets and their historical costs. However, the original allocations do not automatically establish the assets’ fair market values on the exchange date. Some cost segregation companies will do this calculation for you as well.

Step 3: Calculate Gain and Potential Recapture

For each asset or asset category, determine the gain. This determines the maximum potential Section 1245 ordinary income recapture and the Section 1250 consequences associated with the relinquished property.

Step 4: Identify the Prospective Replacement Property

Identify the replacement real property within the normal 45-day identification period.

Step 5: Perform a Preliminary Replacement-Property Allocation

Similar to step 2, before closing, determine the expected composition of the replacement property (the one you are purchasing):

• Section 1250 real property.
• Section 1245 property that also qualifies as Section 1031 real property.
• Personal property that does not qualify as Section 1031 real property.

This analysis might come from a preliminary cost segregation review, engineering analysis, appraisal, construction schedule, builder cost records, purchase-price allocation or another bona fide calculation.

This preliminary allocation serves two purposes.

First, it estimates how much replacement Section 1245 property will be available for the Section 1245(b)(4) recapture calculation, which is the rule that limits your recapture to the gain recognized plus the value of non-1245 property received. We run this in Step 9.

Second, it estimates how much personal property will be transferred with the replacement real estate

Step 6: Apply the 15% Rules

Compare the aggregate fair market value of the replacement personal property with the fair market value of the larger replacement real property.

If the personal property is 15% or less and is normally transferred with the real estate, it generally does not have to be treated as a separate property for the identification limits.

The QI can also generally acquire and transfer it without losing the specific incidental-property safe-harbor protection. Even so, that personal property is still non-like-kind property, so it remains taxable boot.

The safe harbor saves the identification, not the tax.

If the personal property exceeds 15%, the real estate exchange does not automatically fail. However, those specific protections are unavailable, and you, your tax professional, QI and closing professionals must separately address the identification and exchange mechanics.

The personal property remains non-like-kind property in either case.

Step 7: Decide Whether the Replacement Property Works

Before becoming irrevocably committed to the acquisition, ensure you are comfortable with the exchange math. A property can be a wonderful investment and still produce an unexpected tax result.

Step 8: Close and Finalize the Replacement Allocation

After the acquisition, complete the final cost segregation study or other supportable allocation using the actual property, costs and closing information. The preliminary allocation guides the transaction. The final allocation supports the tax return.

Step 9: Calculate Section 1245 Recapture

Apply IRC Section 1245(b)(4) using the gain otherwise recognized and the fair market value and classification of the replacement property received.

This is where the replacement-property allocation becomes indispensable. Without it, you might know exactly what Section 1245 property was relinquished but have no defensible answer for how much Section 1245 property was received.

Step 10: Report the Exchange

Finally, report all the gobbly-goo on your tax returns. Have a beer. Yay!

To Recap the Cost Segregation Trouble

A cost segregation study can follow you into a Section 1031 exchange.

It tells you what tax classifications went out the door. However, you might also need a preliminary and final allocation of the replacement property to determine what came back through it.

Section 1245 does not always mean personal property. Some Section 1245 assets can also qualify as real property for Section 1031. Conversely, assets that appear attached to a building might still be personal property under the Section 1031 regulations.

The 15% incidental-property rules simplify certain exchange mechanics, but they do not make personal property exchange eligible or make depreciation recapture disappear.

Cost segregation can provide accelerated depreciation today and a potential tax headache tomorrow. Sometimes both at once.