Like-Kind Exchange: Definition and How It Works

A like-kind exchange — also called a 1031 exchange after its authorizing statute — is a tax-deferral mechanism under IRC §1031 that allows an owner of real property held for use in a trade, business, or investment to sell that property and defer all capital gains and depreciation recapture tax, provided the sale proceeds are reinvested in qualifying replacement property of a like-kind through a qualified intermediary (QI). The gain is not forgiven; it is deferred and embedded in the replacement property's substituted basis, where it becomes taxable upon an eventual taxable disposition — unless the taxpayer continues exchanging, holds the property until death (triggering a step-up in basis), or donates it.

Scope After the TCJA

Before January 1, 2018, like-kind exchanges were available for both real and personal property. The Tax Cuts and Jobs Act (P.L. 115-97) eliminated §1031 treatment for all personal property (equipment, vehicles, aircraft, artwork, collectibles). As of 2018, only real property located in the United States qualifies. Foreign real property may be exchanged only with other foreign real property under IRC §1031(h); U.S. and foreign property are not like-kind to each other.

Property that explicitly does not qualify includes: stock in trade or inventory, securities, interests in a partnership, certificates of trust, and choses in action — all excluded by IRC §1031(a)(2).

The Four Critical Mechanics

1. Qualified Intermediary Requirement

The taxpayer must never have actual or constructive receipt of the sale proceeds. A QI — an independent third party — holds the proceeds after the relinquished property closes and applies them to acquire the replacement property. Engaging the QI before the relinquished property closes is mandatory; there is no retroactive fix.

2. 45-Day Identification Window

Within 45 calendar days of closing on the relinquished property, the taxpayer must formally identify replacement property candidates in writing to the QI. Identification is limited to: (a) up to three properties of any value, (b) any number of properties whose combined fair market value does not exceed 200% of the relinquished property's FMV, or (c) any number of properties if 95% of the total identified FMV is actually acquired. Missing the 45-day deadline causes the exchange to fail.

3. 180-Day Closing Deadline

The taxpayer must close on the replacement property within the earlier of 180 calendar days after the relinquished property sale or the due date (including extensions) of the tax return for the year of sale. The 180-day clock runs concurrently with the 45-day clock — it does not restart after identification.

4. Boot and Partial Exchanges

Boot is any non-like-kind consideration received — cash, debt relief exceeding debt assumed on replacement property, or personal property. Boot triggers immediate recognized gain to the extent of the boot received (but not to exceed total realized gain). A taxpayer who "trades down" in value or debt will recognize gain on the difference. Taxpayers may choose to receive some boot intentionally if they want a partial gain recognition.

Basis in the Replacement Property

The replacement property receives a substituted (carryover) basis — the adjusted basis of the relinquished property, minus boot received, plus gain recognized and boot paid. This is lower than fair market value, which means accumulated depreciation and appreciation remain embedded and taxable on future sale. The substituted basis calculation is reported on Form 8824 (Like-Kind Exchanges) filed with the federal return for the year the exchange closes.

Section 1231 gain deferred in the exchange retains its §1231 character in the replacement property's basis and is subject to the §1231 lookback rules on future disposition.

Planning Alternatives When §1031 Isn't Available

For gains from non-qualifying assets (personal property, business interests, stock), two other deferral tools are available:

  • Qualified Opportunity Zone investment (IRC §1400Z-2): Defers gain from any asset type; provides a 10-year appreciation exclusion on the QOF investment itself.
  • Installment sale (IRC §453): Spreads gain recognition across the payment period — useful when the buyer can't pay in full at closing and §1031 doesn't apply.

Related Terms

How CPAs Use This in Practice

CPAs advising clients on real estate dispositions use §1031 as a first-line deferral tool before considering any sale. Key planning steps: (1) identify the QI before any listing agreement creates constructive receipt risk; (2) model the boot exposure if the client is trading down in value or debt; (3) calendar both the 45-day and 180-day deadlines at closing; (4) file Form 8824 and reduce the replacement property's depreciable basis for MACRS depreciation schedules. For clients holding appreciated real estate at death, a §1031 chain combined with a step-up in basis at death can permanently eliminate the deferred gain. For a step-by-step procedural guide, see How to Execute a 1031 Like-Kind Exchange for Real Estate Clients.