Reverse 1031 exchange rules let you buy a replacement property before you sell the one you are giving up, provided a third party holds title to one of the two properties while the exchange runs. If you have found the right building and your current property has not sold, these are the requirements that decide whether your gain stays deferred.
As co-founder of Seneca Cost Segregation and a real estate investor myself, I’ve worked with owners who reach out right after a reverse exchange closes, wanting the new building broken into components before their first return on it is filed. What we find on those properties is that the exchange quietly shapes the study, from the date depreciation can start to how much of the basis can take bonus depreciation.
Below, I walk through the safe harbor the IRS set out for reverse exchanges, the limits that sit outside its checklist, and the depreciation and recapture effects that most exchange guides leave out.
TL;DR: Reverse 1031 Exchange Rules
- ●Buy first, then sell within 180 days: an exchange accommodation titleholder parks title, the old property is identified within 45 days, and the parked property leaves the arrangement within 180.
- ●The paperwork has its own clock: the written agreement with the titleholder must be signed within five business days of it taking title.
- ●A building you owned in the last 180 days cannot be parked: Revenue Procedure 2004-51 closes that door, and improvements on land you already own are not like-kind property.
- ●Bonus depreciation reaches only the excess basis on a used building: basis carried over from the old property does not qualify, even with the election to restart the schedule.
- ●A cost segregated old property can still trigger recapture: the IRS’s own Form 8824 example recaptures $35,000 as ordinary income inside a valid exchange.
- ●Your study follows the title: while the titleholder holds the replacement property, it is treated as the owner for federal income tax purposes.
What a Reverse 1031 Exchange Is
A reverse exchange runs the usual sequence backward, with the replacement property acquired before the relinquished property is transferred.
The IRS has said its deferred exchange regulations do not apply to these “reverse-Starker” transactions. To give owners a workable route, Revenue Procedure 2000-37 created a safe harbor built around a parking arrangement.
Exchange-Last and Exchange-First Structures
The structure depends on which property the EAT holds while the exchange is pending.
- ●Exchange last: the EAT acquires and holds the replacement property; once your old property is ready to sell, you exchange into the replacement and the EAT conveys it to you.
- ●Exchange first: the EAT takes your relinquished property in exchange for the replacement, which you receive right away, and later transfers the old property to the buyer.
Safe Harbor Requirements Under Revenue Procedure 2000-37
Property counts as held in a qualified exchange accommodation arrangement (QEAA) only when every requirement in section 4.02 of the procedure is met.
Who Can Hold Title as the EAT
The EAT cannot be you or a disqualified person, and it must be subject to federal income tax; a partnership or S corporation qualifies only when more than 90% of its interests belong to owners who are. From acquisition until transfer, the EAT holds legal title, another form of beneficial ownership such as a contract for deed, or the interests in a single-member LLC that holds title.
The Written Agreement Within Five Business Days
No later than five business days after the EAT takes title, you and the EAT must sign the QEAA. The agreement states that the EAT holds the property for your benefit as part of a section 1031 exchange, that the EAT is treated as the beneficial owner for all federal income tax purposes, and that both of you will report the property consistently with that treatment.
You also need a bona fide intent, when title moves to the EAT, for the parked property to serve in a like-kind exchange.
The 45-Day Identification Rule
In a reverse exchange, the property you identify is the one you are giving up. Section 4.02(4) requires the relinquished property to be identified no later than 45 days after the EAT takes title to the replacement, following the principles in the deferred exchange regulations.
Those principles call for an unambiguous description, such as a legal description, street address, or distinguishable name. You may also identify alternative and multiple properties, which is where the familiar three-property and 200% rules come in.
The 180-Day Rule for Finishing the Exchange
No later than 180 days after the EAT takes title, a parked replacement property must go to you, directly or through a qualified intermediary, or a parked relinquished property must go to a buyer who is neither you nor a disqualified person. The combined time both properties spend in a QEAA also cannot exceed 180 days.
What the Taxpayer May Do While Title Is Parked
Section 4.03 lists arrangements that do not break the safe harbor, even when their terms differ from what unrelated parties would negotiate.
- ●Financing support: you or a disqualified person may lend or advance funds to the EAT, guarantee its debt, or indemnify it for costs.
- ●Use and management: the EAT may lease the property to you, and you may manage it, supervise improvements, or act as the contractor.
- ●Purchase terms: you and the EAT may agree to puts and calls at fixed or formula prices for up to 185 days from its acquisition.
- ●Value true-ups: a change in the relinquished property’s value from its estimate may be settled when the EAT sells it.
Section 3.03 adds a caveat. The IRS can still recast an amount paid under one of these arrangements as a fee to the EAT when needed to reflect the deal’s economic substance.
Limits on Property, Owners, and Improvements
Meeting the section 4.02 checklist is necessary, and a few more rules still decide whether the exchange qualifies.
Property You Owned in the Last 180 Days
Revenue Procedure 2004-51 added section 4.05, which says the safe harbor does not apply to replacement property you owned at any point in the 180 days ending on the date the EAT takes title. The IRS made the change after some taxpayers read the original procedure as allowing them to park a building they already owned and take it back as replacement property.
Improvements on Land You Already Own
The same procedure restates that exchanging real estate for improvements on land you already own does not meet section 1031, citing DeCleene v. Commissioner. In a build-to-suit exchange, the EAT holds the property during construction, you may supervise the work or act as contractor, and the 180-day limit still governs.
For a ground-up replacement, our guide to cost segregation for new construction covers how a study works on a building still going up.
Related-Party Exchanges
Section 1031(f) removes nonrecognition when you exchange with a related person and either of you disposes of the exchanged property within two years. The Form 8824 instructions list family members and related entities as examples and treat an exchange routed through an intermediary, including an EAT, as an indirect exchange with the related party.
The statute excuses dispositions after a death, certain involuntary conversions, and transactions where tax avoidance was not a principal purpose.
Real Property Held for Business or Investment
For exchanges after December 31, 2017, section 1031 covers only real property held for use in a trade or business or for investment, other than property held primarily for sale. U.S. and foreign real property are not like kind to each other.
The Form 8824 instructions also show how cost segregation fits here: components a taxpayer had depreciated as section 1245 property still counted as real property for the exchange.
How a Reverse Exchange Affects Depreciation on the New Property
The exchange rules decide whether your gain is deferred, and the depreciation regulations decide how quickly you recover the basis you end up with.
When Depreciation on the Replacement Property Begins
As long as the replacement property sits with the EAT, the QEAA treats the EAT as its beneficial owner for all federal income tax purposes, so the property generally does not go on your depreciation schedule until you receive it.
Treasury Regulation 1.168(i)-6 adds a second marker: the time of replacement is the later of when the replacement property is placed in service or when the relinquished property is disposed of. Your replacement-property depreciation under those rules therefore runs from no earlier than the sale of the old property, so confirm the dates with your CPA before a study’s figures go on a return.
Exchanged Basis and Excess Basis
Exchanged basis is the lesser of your basis in the replacement property under section 1031(d) or the adjusted depreciable basis of the property you gave up. Excess basis is whatever exceeds it, typically the extra cash or debt that went into the new property.
Excess basis is treated as placed in service in the year of replacement, with its own recovery periods and methods. When the replacement’s recovery period is shorter than the old property’s, the exchanged basis stays on the old property’s remaining recovery period, which limits how much faster it can be recovered even after engineers identify 5-, 7-, and 15-year components.
Bonus Depreciation on a Used Replacement Property
When the replacement is an existing building, its components are generally used property, and Treasury Regulation 1.168(k)-2 allows bonus depreciation only on the remaining excess basis of used replacement property. The exchanged basis falls outside the rule because it is determined by reference to the property you gave up.
For qualifying components acquired and placed in service after January 19, 2025, the excess-basis portion can take 100% bonus depreciation, and our breakdown of bonus depreciation under the One Big Beautiful Bill covers the dates.
We see this framing consistently from owners finishing an exchange: they expect the full price of the new building to feed bonus depreciation. The reality is that only the excess basis can take it on a used property, so the basis split belongs in the conversation with your CPA before anyone models a first-year deduction.
The Election to Treat the Full Basis as New
Section 1.168(i)-6(i) lets you elect out of the exchange depreciation rules, so the exchanged and excess basis together are treated as placed in service at the time of replacement. The whole basis then starts on fresh recovery periods, which can let reclassified components recover their full share on 5-, 7-, and 15-year schedules.
On a used building, bonus depreciation still applies only to the excess basis after the election, as Example 6 in the bonus regulation shows.
How to Manage Recapture on the Property You Give Up
A like-kind exchange defers gain, and depreciation recapture on a cost segregated building does not always defer with it.
Section 1245 Recapture Inside a Like-Kind Exchange
The Form 8824 instructions work through this case. In their example, an owner had allocated $35,000 of an apartment building’s basis to section 1245 property, fully depreciated it, and received only section 1250 property in the exchange, so the full $35,000 was recaptured as ordinary income.
Those components still counted as real property for section 1031, so qualifying for the exchange and avoiding recapture are separate questions. Our comparison of section 1245 vs 1250 property explains how each class is recaptured.
Why the Replacement Property’s Components Matter
Section 1245(b)(4) caps recapture in a like-kind exchange at the gain recognized plus the fair market value of property received that is not section 1245 property. The more of what you receive is section 1245 property, the lower that cap can fall, so the replacement building’s component mix belongs in the planning with your CPA.
Any recapture that does apply is taxed as ordinary income, and our guide to the depreciation recapture tax rate shows how each property class is taxed.
How Seneca Studies a Replacement Property
At Seneca, here is what the cost segregation study process looks like for a replacement property acquired in a reverse exchange.
Study Timing Around the EAT Transfer
We schedule the engineering work around the date title moves from the EAT to you, and we ask for the closing statements from both legs of the exchange plus the old property’s depreciation schedule. Those documents give your CPA what is needed to separate exchanged and excess basis, and our article on cost segregation for a recently purchased building covers the first-year filing decision.
Onsite or Virtual Property Tour
You decide whether our engineers tour the replacement property in person or virtually. Many commercial owners choose onsite visits, virtual tours work well for most residential properties, and our page on virtual property tours for cost segregation explains the remote option.
Component Breakdown for the Basis Split
Our engineers break the replacement property into every component it contains, each with a cost and a recovery class, so your CPA can apply the exchanged and excess basis rules to real numbers. Our Head of Engineering signs off on every study, and with timely collaboration from you, we deliver in 5 to 10 business days.
Mistakes That Sink a Reverse Exchange
The mistakes below are procedural, and each one has a direct correction.
- ●Closing on the replacement in your own name: property you owned in the prior 180 days cannot be parked, so handing title to an EAT afterward does not fix it; put the EAT in place before closing.
- ●Signing the QEAA late: the five-business-day window starts when the EAT takes title; have the agreement drafted before closing day.
- ●Missing the 45-day identification: an unidentified relinquished property takes the exchange outside the safe harbor; identify alternatives if you have more than one candidate.
- ●Running past 180 days: the parked property must leave the arrangement in time; price and market the old property to sell inside the window.
- ●Modeling bonus on the full purchase price: on a used building, only the excess basis qualifies; ask for an estimate that separates the two.
- ●Ignoring recapture on the old building: section 1245 components can be recaptured even when the exchange qualifies; review the relinquished property’s depreciation history before choosing a replacement.
Frequently Asked Questions
Below are the questions we hear most from owners and CPAs working through a reverse exchange.
Why Exchange Investors Choose Seneca for Replacement Property Studies
Seneca does cost segregation and nothing else, and every study is handled by our in-house engineering team, with no sales middlemen between you, your CPA, and the engineers. Each report breaks the property into all of its components, we also perform Qualified Production Property (QPP) studies, and our Head of Engineering signs off on every study.
You work with a dedicated Project Manager, our Engineering team, and an Advisor, with real-time updates at each stage. Audit defense is included, and across 10,200+ properties assessed, from small Midwest single-family rentals to 120+ unit hotels and office buildings over 40,000 square feet, we have had zero IRS audits triggered or lost.
To size the deduction on your new building, start with our cost segregation calculator.
Conclusion
Reverse 1031 exchange rules come down to a short list of dates and a clean chain of title: an EAT in place before you buy, a signed QEAA within five business days, the old property identified within 45 days, and everything out of the arrangement within 180.
What happens after the exchange turns on details most checklists skip, including when depreciation starts, how much of the basis can take bonus depreciation, and whether the old building’s components bring recapture with them.
If you are lining up a replacement property, reach out for a free estimate or run the numbers through the calculator, and our engineers will show you what a study on the new building could look like.
