A 1031 exchange is a transaction under Section 1031 of the Internal Revenue Code that allows an investor to sell investment real estate and reinvest the proceeds in other investment real estate while deferring capital gains tax. The tax is postponed — not eliminated — and strict identification and closing deadlines apply.
How a 1031 exchange works
The mechanics matter more than the concept, because most failed exchanges fail on procedure. In a standard deferred exchange, the investor sells the relinquished property and the sale proceeds go directly to a qualified intermediary — never to the investor. From the closing date, two clocks start running simultaneously:
- 45 days to identify potential replacement properties in writing. Most investors use the three-property rule (identify up to three candidates regardless of value), though alternatives exist for identifying more.
- 180 days to close on one or more of the identified properties. The 180-day period runs from the same start date as the 45-day window — it is not 45 + 180.
Neither deadline has a hardship extension outside of federally declared disasters. Miss either one and the transaction becomes a taxable sale.
For the exchange to be fully tax-deferred, the investor generally needs to acquire replacement property of equal or greater value, reinvest all net proceeds, and replace any debt paid off at sale with new debt or additional cash. Any cash or non-qualifying value the investor walks away with is boot, and boot is taxable even when the rest of the exchange qualifies.
What qualifies as like-kind
Since the 2017 tax law, Section 1031 applies only to real property held for investment or productive use in a trade or business. “Like-kind” is broader than most investors assume: raw land can be exchanged for an apartment building, a warehouse for farmland, a rental house for a fractional interest in institutional property. What doesn’t qualify: a primary residence (that’s Section 121 territory), property held primarily for resale such as fix-and-flips, and — since 2018 — personal property of any kind.
One nuance advisors encounter often: fractional real estate interests can qualify. A beneficial interest in a Delaware Statutory Trust is treated as a direct interest in the underlying real estate, which is why DSTs have become the standard vehicle for investors who want to complete an exchange without taking on active management. Tenant-in-common interests can also qualify, subject to their own requirements.
What deferral actually defers
The deferred gain doesn’t disappear — it carries into the replacement property through a reduced cost basis, along with accumulated depreciation. If the investor later sells without exchanging again, the deferred gain and depreciation recapture come due. Many investors instead exchange serially — the strategy informally known as swap till you drop — because at death, heirs generally receive a stepped-up basis that can eliminate the deferred gain entirely. That estate-planning endgame, not the deferral itself, is often the real rationale for a 1031 program.
Variations
The standard deferred exchange covers most situations, but two variations matter. A reverse 1031 exchange acquires the replacement property before the relinquished property sells — useful in competitive markets, at meaningfully higher cost. An improvement (or construction) exchange applies exchange proceeds to improvements on the replacement property within the 180-day window. And for investors whose endpoint is a REIT rather than direct property, a 1031 into a DST followed later by a 721 exchange into a REIT’s operating partnership has become a common two-step path.
FAQ
What is a 1031 exchange in simple terms?
It’s a way to sell one investment property and buy another without paying capital gains tax at the time of sale. The tax bill is deferred as long as the rules are followed — proceeds held by an intermediary, replacement property identified within 45 days, and closing within 180 days.
How does a 1031 exchange work step by step?
Engage a qualified intermediary before closing the sale; sell the relinquished property with proceeds going to the intermediary; identify replacement property in writing within 45 days; close within 180 days; report the exchange on IRS Form 8824.
Can you do a 1031 exchange on a primary residence?
Generally no. Section 1031 requires property held for investment or business use. A primary residence falls under the Section 121 exclusion instead. Mixed-use situations — such as a home converted to a rental, or a property with both uses — can sometimes involve both provisions, which is squarely a question for a tax professional.
What happens if the 45-day or 180-day deadline is missed?
The exchange fails and the sale becomes taxable. There is no extension for ordinary circumstances, which is one reason pre-identified, ready-to-close options such as DST interests are frequently used as backup identifications.
Related terms
Delaware Statutory Trust (DST) · Qualified Intermediary · Reverse 1031 Exchange · Boot · 721 Exchange · Depreciation Recapture
Educational content only; not investment, tax, or legal advice. Consult qualified professionals regarding your specific circumstances.
