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Glossary · Reverse exchanges

Rev. Proc. 2000-37 (Reverse Exchange Safe Harbor)

Rev. Proc. 2000-37 is the IRS safe harbor for reverse exchanges: a titleholder parks property for up to 180 days. It was narrowed by Rev. Proc. 2004-51.

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The short answer

Rev. Proc. 2000-37 is the IRS revenue procedure, published in Internal Revenue Bulletin 2000-40, that created a safe harbor for reverse exchanges by treating an exchange accommodation titleholder as the owner of property it holds for you in a qualified exchange accommodation arrangement. It applies to titleholders that acquire property on or after September 15, 2000. Rev. Proc. 2004-51 later narrowed it so that it does not cover property you owned in the prior 180 days.

At a glance

PublishedInternal Revenue Bulletin 2000-40, October 2, 2000
EffectiveTitleholder acquisitions on or after September 15, 2000
Core limitParked property out within 180 days
2004 changeNo safe harbor for replacement property you owned in the prior 180 days

The revenue procedure filled a gap the 1991 regulations left open.

Section 1031(a)(3) and the deferred exchange regulations deal with selling first and buying later. Section 2.04 of Rev. Proc. 2000-37 records that the preamble to those regulations said they do not apply to reverse exchanges, and that Treasury would keep studying them.

Taxpayers meanwhile used parking transactions with accommodation parties who were supposed to carry enough benefits and burdens of ownership to be treated as owners. The revenue procedure gave them a workable route where the taxpayer has a genuine intent to exchange and finishes within a short time, by treating the accommodation party as owner if the property is held in a qualified exchange accommodation arrangement.

Its main terms fit on one page.

Section 4.02 sets the conditions: an independent titleholder, a written agreement within five business days, identification of the relinquished property within 45 days, and transfer out within 180 days. Section 4.03 lists permitted side arrangements, including loans and guarantees from you, a lease to you, and puts and calls for up to 185 days.

Hypothetical: a titleholder takes title to a $3,000,000 retail building for you on June 1. You identify your apartment building by July 16 and sell it on October 1, and the titleholder transfers the retail building to you through your intermediary the same day, day 122. The exchange fits inside the 180 days ending November 28. Check every date with your intermediary and CPA.

Section 3.02 says parking can be done outside the safe harbor, with no inference either way. Section 3.04 says that if the conditions are not met, ownership is decided without regard to the revenue procedure.

Rev. Proc. 2004-51 closed the swap-with-yourself reading.

Section 2.04 of Rev. Proc. 2004-51 says some taxpayers read the safe harbor to allow transferring their own property to a titleholder and receiving it back as replacement property. Section 2.05 cites DeCleene v. Commissioner, 115 T.C. 457 (2000), for the rule that exchanging real estate you own for improvements on land you already own is not a like-kind exchange.

Section 2.06 of the 2004 procedure adds that Treasury and the IRS were still studying parking in which a person related to you leases land to an accommodation party that builds improvements and transfers the improved leasehold to you. That pattern was left under study.

It added section 4.05: no safe harbor for replacement property you owned within 180 days before the titleholder took title, for transfers on or after July 20, 2004. That is the rule behind the answer on building on land you already own. For planning, see the reverse exchange guide and parking arrangement.

Related questions

Is Rev. Proc. 2000-37 still in force?

Yes, as modified by Rev. Proc. 2004-51. The 2004 procedure rewrote sections 1 and 4.01 and added the section 4.05 limitation.

Does the titleholder's role make it a disqualified person?

No. Section 3.03 says services as a titleholder in a qualified arrangement are not counted in deciding whether that person is a disqualified person.

Does the revenue procedure change the 45-day and 180-day rules for forward exchanges?

No. It applies only to arrangements with exchange accommodation titleholders; forward exchanges remain governed by section 1031(a)(3) and Reg. section 1.1031(k)-1.

Sources

Checked against these publications on September 30, 2026. Rules and figures change; confirm the current version with your CPA or attorney before you act. This page is general information, not tax or legal advice.

  1. IRS, Rev. Proc. 2000-37, Internal Revenue Bulletin 2000-40, page 308
  2. IRS, Rev. Proc. 2004-51, Internal Revenue Bulletin 2004-33
  3. 26 U.S.C. section 1031, Exchange of real property held for productive use or investment (with 2017 amendment notes)

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