Reverse 1031 Exchange: What Rev. Proc. 2000-37 Actually Requires, With a Dated Timeline
Quick Answer
A reverse 1031 exchange, buying the replacement property before selling the one you own, is outside the statute and the deferred-exchange regulations, and the IRS offers one safe harbor for it: Rev. Proc. 2000-37, as limited by Rev. Proc. 2004-51. Under it a third party, the exchange accommodation titleholder (EAT), takes legal title to the property. Within 5 business days you and the EAT sign a written agreement; within 45 days you identify the property you will sell; and within 180 days the EAT must transfer the property out, and the combined holding period cannot exceed 180 days (Rev. Proc. 2000-37, section 4.02). Two limits catch people: the safe harbor “does not apply” to replacement property you owned in the 180 days before the EAT took title (Rev. Proc. 2004-51, section 4.05), and the EAT cannot be you or a disqualified person. For a hypothetical November 2, 2026 EAT purchase the dates are November 9, 2026 for the agreement, December 17, 2026 to identify and May 1, 2027 to finish (our arithmetic). Outside the safe harbor the IRS says it will not follow the 2016 Tax Court decision in Estate of Bartell, in which a titleholder held a parked property 17 months (IRS Action on Decision 2017-06, August 14, 2017). As of October 7, 2026.
Key Takeaways
- The statute's 45 and 180 days run from the sale of the property you give up. In a reverse exchange the sale comes last, so the Treasury's own preamble to the 1991 regulations said the deferred exchange rules “do not apply” to it, as Rev. Proc. 2000-37 records (section 2.04). The safe harbor was written to fill that gap.
- Rev. Proc. 2000-37 section 4.02 has six tests, and its clocks start when the EAT takes title, not when you sell: 5 business days for the written agreement, 45 days to identify what you will sell, 180 days to transfer, and no more than 180 days combined holding. Miss one and the revenue procedure “does not apply” (section 3.04).
- You cannot park property you already owned. Rev. Proc. 2004-51 (effective for transfers on or after July 20, 2004) removes the safe harbor for replacement property you owned within the 180 days before the EAT took title, and the Form 8824 instructions repeat it.
- Improvement (build-to-suit) exchanges work inside the safe harbor only on property the EAT acquires from someone else: you may supervise construction and act as contractor (section 4.03(5)), but building on land you already own is not an exchange (Rev. Proc. 2004-51, section 2.05).
- Non-safe-harbor parking is a litigation position. The Tax Court sided with the taxpayer in Estate of Bartell, 147 T.C. 140 (2016); the IRS recommended nonacquiescence and says it will not follow that decision outside the revenue procedure.
- The revenue procedure lets you guarantee the EAT's debt or lend it money (section 4.03(2) and (3)). It says nothing about which third-party lenders will lend to an EAT or on what terms, and we found no primary source that does.
CSV · 45 rows
Reverse 1031 exchange: the Rev. Proc. 2000-37 safe harbor tests, the Rev. Proc. 2004-51 limit, related-party rules, two dated examples and the Bartell timeline
45 rows: each safe harbor test with its section of Rev. Proc. 2000-37; the 180-day prior-ownership limit of Rev. Proc. 2004-51; the related-party tests in 26 U.S.C. 1031(f) and Treas. Reg. 1.1031(k)-1(k); two hypothetical timelines computed from the rules (our arithmetic); and the dated facts of Estate of Bartell from the IRS Action on Decision 2017-06.
Why a “reverse” exchange needs its own rule
Section 1031(a)(3) of the Internal Revenue Code sets the two famous limits for a deferred exchange: replacement property must be identified within 45 days after the taxpayer “transfers the property relinquished in the exchange,” and received by the earlier of 180 days after that transfer or the return due date (26 U.S.C. 1031(a)(3)). Both clocks start at the sale. Our timeline guide for late-2026 sales works through them.
In a reverse exchange you acquire first, so there is no sale to start the clock. The Treasury said so when it wrote the regulations. Rev. Proc. 2000-37 records that the preamble to the 1991 final regulations stated that the deferred exchange rules do not apply to reverse-Starker exchanges, defined as “exchanges where the replacement property is acquired before the relinquished property is transferred” (section 2.04), and that Treasury and the IRS would keep studying how the general rule of section 1031(a)(1) applies to them. The same section describes the market response: taxpayers began “parking” the property they wanted with an accommodation party. The revenue procedure then gave those parking arrangements a safe harbor (section 2.06): where the taxpayer has a genuine intent to do an exchange and finishes it within a short time, the IRS lets the accommodation party be treated as the owner.
Two structures fit the safe harbor. In exchange-last (what most people mean by a reverse exchange) the EAT buys and holds the replacement property while you find a buyer for your property. In exchange-first the EAT takes your relinquished property up front and holds it until you transfer it to the ultimate buyer (Rev. Proc. 2000-37, section 2.05 describes both). The tests below cover either. For who handles the sale side, see our guide to the qualified intermediary; the revenue procedure lets an EAT that meets the intermediary safe harbor also serve as your qualified intermediary (section 4.03(1)).
The six tests, section by section
Rev. Proc. 2000-37 applies to arrangements where the EAT acquires qualified indicia of ownership on or after September 15, 2000 (section 5). Property is in a “qualified exchange accommodation arrangement” (QEAA) only if all of section 4.02 is met.
| Test (Rev. Proc. 2000-37) | What it requires | Clock starts |
|---|---|---|
| 4.02(1) Who holds title | A titleholder that is not you or a disqualified person and is subject to federal income tax (if a partnership or S corporation, more than 90 percent owned by taxpayers subject to federal income tax). It holds qualified indicia of ownership at all times: legal title, a contract for deed, or interests in a disregarded entity such as a single-member LLC that holds title. | Day it acquires the property |
| 4.02(2) Intent | At transfer to the EAT it is your bona fide intent that the property be replacement or relinquished property in an exchange intended to qualify under section 1031. | Day of transfer to EAT |
| 4.02(3) Agreement | A written qualified exchange accommodation agreement, no later than 5 business days after the transfer, saying the EAT holds the property for your benefit to facilitate a 1031 exchange, is treated as beneficial owner for all federal income tax purposes, and that both parties report consistently. | Day of transfer to EAT |
| 4.02(4) Identification | No later than 45 days after the replacement property is transferred to the EAT, the relinquished property is identified, consistent with Treas. Reg. 1.1031(k)-1(c); alternative and multiple properties may be identified as in (c)(4). | Day of transfer to EAT |
| 4.02(5) Transfer out | No later than 180 days after the EAT acquires the property, it is transferred to you as replacement property (directly or through a qualified intermediary), or to someone who is not you or a disqualified person as relinquished property. | Day of transfer to EAT |
| 4.02(6) Combined holding | The combined time the relinquished property and the replacement property are held in the QEAA does not exceed 180 days. | Day of transfer to EAT |
Three points follow from the text. Identification is of the property you will sell, not of replacement property, because the replacement property is already in the EAT's hands. The text counts business days only for the agreement and says nothing about weekends or holidays for the 45 and 180 days (our reading), so treat a Saturday day 180 as the deadline. And the revenue procedure contains no tax-return due date limit like the one in section 1031(a)(3)(B)(ii); whether that statutory cap bites on a year-end reverse exchange is a question for your adviser, which we do not answer here.
If any test fails, the safe harbor is gone: section 3.04 says that the ownership question and the treatment of the transactions “will be made without regard to the provisions of this revenue procedure.” The IRS also reserves the right to recast payments the parties make under the permitted arrangements as a fee to the EAT (section 3.03).
A worked timeline
Hypothetical: you contract to buy an investment property and have the EAT take title on Monday, November 2, 2026, while your own property is still on the market. We count from the transfer of title (our arithmetic; the text does not define the counting convention).
| Event | Rule | Example A (EAT takes title Mon Nov 2, 2026) | Example B (EAT takes title Tue Dec 1, 2026) |
|---|---|---|---|
| Qualified exchange accommodation agreement signed by | 5 business days, section 4.02(3) | Mon Nov 9, 2026 | Tue Dec 8, 2026 |
| Identify the property you will sell by (day 45) | 45 days, section 4.02(4) | Thu Dec 17, 2026 | Fri Jan 15, 2027 |
| Last day for puts and calls at fixed or formula prices (day 185) | 185 days, section 4.03(6) | Thu May 6, 2027 | Fri Jun 4, 2027 |
| Property must leave the EAT, and your property must close, by (day 180) | 180 days, sections 4.02(5) and (6) | Sat May 1, 2027 | Sun May 30, 2027 |
| Your own prior-ownership window (Rev. Proc. 2004-51) | 180 days before transfer to EAT | about May 6, 2026 to Nov 2, 2026 | about Jun 4, 2026 to Dec 1, 2026 |
Read it as a plan for the sale, not just the purchase. In Example A your property must be under contract and closing in time for the EAT to transfer on or before May 1, 2027; with a hard stop on a Saturday you would in practice need a closing date in the week before. Both columns are our arithmetic from the rules; neither is a real transaction.
The limit that kills most DIY reverse exchanges: property you already owned
Rev. Proc. 2004-51 explains why it modified the earlier procedure. Some taxpayers had read Rev. Proc. 2000-37 to let them transfer property to an EAT and receive that same property back as replacement property in a purported exchange for other property of theirs (section 2.04). The IRS added a limitation (section 4.05 of the modified procedure): “This revenue procedure does not apply to replacement property held in a QEAA if the property is owned by the taxpayer within the 180-day period ending on the date of transfer of qualified indicia of ownership of the property to an exchange accommodation titleholder.” It applies to transfers on or after July 20, 2004 (section 6). The IRS Instructions for Form 8824 (2025) say the same: property transferred to you can't be treated as received in an exchange if you previously owned it within 180 days of its transfer to the EAT.
The practical consequence is that you cannot sell your property to an EAT, buy it back and call it replacement property. The text does not elaborate on what “owned by the taxpayer” covers, for example ownership through an entity, so ask your adviser before relying on a gap.
The improvement exchange (build-to-suit)
An improvement exchange is a reverse exchange in which the EAT buys the land or building and construction or renovation happens while the EAT holds title, so that you receive the finished value. The revenue procedure allows the pieces that make this work. Without defeating the QEAA, you may manage the property, “supervises improvement of the property, acts as a contractor” (section 4.03(5)), lease it from the EAT (4.03(4)), guarantee the EAT's debt or advance it funds (4.03(2), (3)). The regulations add a limit on what counts: for replacement property to be produced, work not finished when you receive the property is not treated as like-kind. In Treas. Reg. 1.1031(k)-1(e)(3)(iii) the property received counts as identified property “only to the extent the property received constitutes real property under local law,” and the regulation's own example gives credit only for the land and the 20 percent of construction completed at transfer. That regulation is about deferred exchanges, so applying it to a QEAA is our reading; the practical point is the same, finish the work before the 180th day.
Three edges:
- Land you already own is out. Rev. Proc. 2004-51 states that an exchange of real estate for improvements on land owned by the same taxpayer does not meet section 1031, citing DeCleene v. Commissioner, 115 T.C. 457 (2000) (section 2.05). Together with the 180-day limit, an improvement exchange cannot be used to build on your own parcel.
- Related-party leaseholds are under review. The IRS says it is continuing to study transactions in which a related person transfers a leasehold to an accommodation party, who improves the land and transfers the improved leasehold to the taxpayer for other real estate (section 2.06).
- The clock is the same 180 days. A construction schedule longer than the holding period is outside the safe harbor, which brings us to what the IRS does about those.
Related parties: three separate rules
- The EAT. It cannot be you or a disqualified person (Rev. Proc. 2000-37, section 4.02(1)). Treas. Reg. 1.1031(k)-1(k) defines a disqualified person as your agent at the time of the transaction, which includes anyone who acted as your employee, attorney, accountant, investment banker or broker, or real estate agent or broker within the 2 years ending on the date of transfer (services in other section 1031 exchanges, and routine financial, title, escrow or trust services by institutions, are ignored), and anyone related to you under section 267(b) or 707(b) with 10 percent substituted for 50 percent. A relative or a company you control would, on our reading of those relationship tests, not work. Services a person provides for you as the EAT are not counted in deciding whether it is disqualified (Rev. Proc. 2000-37, section 3.03).
- The two-year rule. If you exchange with a related person and either of you disposes of the property within 2 years of the last transfer, nonrecognition is lost, with exceptions for death, involuntary conversion and cases where tax avoidance was not a principal purpose (26 U.S.C. 1031(f)(1) and (2)). “Related person” means section 267(b) or 707(b)(1) relationships (1031(f)(3)), and the section does not apply to an exchange that is part of a transaction structured to avoid its purposes (1031(f)(4)).
- Guarantees and loans are allowed. You or a disqualified person may guarantee the EAT's debt or lend it money without breaking the QEAA (section 4.03(2) and (3)), even on terms that an arm's-length bargain between unrelated parties would not typically produce (section 4.03). That is the one place the revenue procedure expressly lets a related party in.
Outside the safe harbor: Bartell and the IRS's answer
Rev. Proc. 2000-37 says it does not decide whether parking outside its terms works: “no inference is intended” for parking transactions that do not satisfy the safe harbor (section 3.02). The Tax Court decided one such case. According to the IRS Action on Decision (AOD 2017-06, IRB 2017-33, August 14, 2017), in Estate of Bartell v. Commissioner, 147 T.C. 140 (2016), a titleholder acquired title to a replacement property on August 1, 2000; the taxpayer built a drugstore on it and began leasing it from the titleholder in June 2001; in December 2001 a qualified intermediary sold the taxpayer's relinquished property and used the proceeds to buy the replacement property from the titleholder and transfer it to the taxpayer. The titleholder held title for 17 months; day 180 after August 1, 2000 was January 28, 2001 (our arithmetic), so the arrangement was far outside the safe harbor. The AOD says the court held that a titleholder “need not assume the benefits and burdens of ownership of the replacement property in order to be treated as its owner for section 1031 purposes before the exchange,” and that the transaction was a like-kind exchange.
The IRS did not accept it. The AOD recommends nonacquiescence and says that for reverse exchanges outside the revenue procedure, “Taxpayers that use accommodating parties outside the scope of Rev. Proc. 2000-37 have not engaged in an exchange if the taxpayer, rather than the accommodating party, acquires the benefits and burdens of ownership of the replacement property before the taxpayer transfers the relinquished property.” It adds: “The Service will not follow the Tax Court's opinion in Bartell to the extent the opinion provides otherwise.” The AOD itself carries a legend that it is not to be relied on or cited as precedent by taxpayers. What that means for a reader: Bartell is a favorable decision for one taxpayer on 2000 to 2001 facts, but a plan that runs past 180 days or that leaves you with the benefits and burdens of the property invites the IRS to take the opposite position, and you would be the test case.
The financing problem: who lends to an EAT
The law fixes the shape of the loan and says nothing about the lender. What the revenue procedure establishes:
- The EAT must hold qualified indicia of ownership at all times, which can be legal title or interests in a disregarded entity that holds title (section 4.02(1)). A lender therefore deals with a single-purpose title-holding entity, not with you.
- You or a disqualified person may lend or advance funds to the EAT or guarantee its secured or unsecured debt, including debt incurred to acquire the property (section 4.03(2) and (3)). That is the permitted bridge between your credit and the EAT.
- Put and call agreements at fixed or formula prices are allowed only for periods up to 185 days from the EAT's acquisition (section 4.03(6)), and any variation in the value of relinquished property from its estimated value must be settled through your advance of funds to, or receipt from, the EAT (section 4.03(7)).
Our reading, not a source statement: because the property sits in an entity that must dispose of it within 180 days, a lender is underwriting a hold of at most about six months, collateralized by property the EAT does not keep and backed by your guarantee or your own loan. The revenue procedure does not say which lenders will do that, at what leverage or rate, or whether your existing lender will consent to the property leaving its collateral. We found no government or court source that reports those terms, so this page gives none. Ask any lender, before you contract, whether it has closed a loan to an exchange accommodation titleholder and whether it requires your full recourse guarantee.
What a reader can do with this
- Check the 180-day look-back first. If you owned the property you want to park at any point in the six months before the EAT would take title, the safe harbor is unavailable (Rev. Proc. 2004-51).
- Put the dates on a calendar from the EAT's closing: the agreement in 5 business days, identification at day 45, hard stop at day 180, and do not count on a weekend or holiday extension.
- Choose the EAT carefully. Rule out anyone who was your attorney, accountant, broker or agent in the last two years, and any relative or controlled entity.
- Plan the improvements to finish before day 180, with the EAT, not you, holding title to a parcel you did not already own.
- Do not rely on Bartell. A structure that runs longer than 180 days is a position the IRS has said it will contest.
- Get the financing in writing before the contract. The EAT's loan and your guarantee are a financing question the tax rules do not answer.
FAQ
Filing alert · free
An email when reverse 1031 exchange files with the SEC
When reverse 1031 exchange files: what changed, the one number that matters, and the accession number to check it yourself.
Sources, read and saved on October 7, 2026: Rev. Proc. 2000-37, 2000-2 C.B. 308, as printed in Internal Revenue Bulletin 2000-40 (October 2, 2000); Rev. Proc. 2004-51; 26 U.S.C. 1031 as published by Cornell LII; 26 CFR 1.1031(k)-1 as published on the eCFR (text as of September 30, 2026); IRS Instructions for Form 8824 (2025); and IRS Action on Decision 2017-06 (Estate of Bartell, IRB 2017-33, August 14, 2017). We could not retrieve the text of the Tax Court's opinion itself from a primary source, so the Bartell facts and the quoted holding are those the IRS states in the AOD. Dates and day counts are our arithmetic from the rules, for hypothetical transactions. This is analysis of public documents and the law, not tax, legal or investment advice.
Keep reading.
- 0129 min read
1031 Exchange on a Primary Residence: Why It Fails, What Section 121 Does Instead, and How to Use Both
A home you live in cannot be 1031-exchanged, because section 1031(a)(1) covers only property held for business or investment. The tool for a residence is the section 121 exclusion: $250,000 of gain ($500,000 on a qualifying joint return) after 2 years of use in the last 5. Rev. Proc. 2005-14's own numbers show how to use both on one property, and the 5-year rule and nonqualified-use rule decide what happens when a 1031 rental becomes your home: in our worked example, $480,000 of a $730,000 gain is taxable for a single filer.
- 0228 min read
1031 Qualified Intermediary: What the Law Requires, the 8 State Laws, and What Exchangers Lost When QIs Failed
There is no federal license for a 1031 qualified intermediary. Treas. Reg. 1.1031(k)-1(g)(4) only says who cannot be one. We read the regulation, the eight state statutes we could verify (California, Colorado, Connecticut, Maine, Nevada, Oregon, Virginia, Washington), the LandAmerica 1031 Exchange Services bankruptcy filings and the Justice Department records on the 1031 Tax Group and Vesta Strategies. Bond and insurance minimums by state, who is a disqualified person, how the money must be held, and a checklist of questions for a QI, each tied to its source.
- 0326 min read
1031 Exchange Rules for 2026, From the Code Itself (Plus What 2023 IRS Data Shows)
Every 1031 exchange rule with the section it comes from: real property only since 2018 (Treas. Reg. 1.1031(a)-3), the 45/180-day limits, the 3-property, 200% and 95% identification rules, boot and mortgage relief, the two-year related-party rule, vacation homes (Rev. Proc. 2008-16), TICs, DSTs, reverse exchanges and disaster relief. The 2025 tax law (P.L. 119-21) did not amend section 1031. And IRS Statistics of Income line-item data: individuals filed 54,746 Forms 8824 for 2023 and deferred $23.7 billion, half the 2022 amount.