A Section 1031 exchange defers gain by swapping one piece of investment real estate for another of like kind, and an investor can repeat that swap indefinitely, deferring tax each time. A Section 721 exchange, sometimes marketed as an UPREIT contribution, moves in a different direction: real estate, or more commonly a DST interest that already holds real estate, is contributed to an operating partnership in exchange for operating partnership units, and 26 U.S.C. Section 721 defers gain recognition on that contribution the same way a partner contributing property to any partnership defers gain.
The two sections solve different problems. A 1031 exchange keeps the investor in direct or DST real estate ownership, replaceable again later. A 721 contribution typically ends the exchange chain, because operating partnership units are not real property and further 1031 deferral is no longer available once the conversion happens, though the original deferred gain remains deferred until the units are eventually sold or redeemed.
Most investors do not contribute real estate directly to an operating partnership under Section 721. The more common structure starts with a standard 1031 exchange into a DST interest, held for a period the sponsor discloses in the offering documents, followed by a second step in which the DST's real estate, or the investor's interest in it, is contributed to the sponsor's operating partnership in exchange for units. The first step defers gain under Section 1031. The second step defers the same gain again under Section 721, because a contribution to a partnership in exchange for a partnership interest is not a taxable sale.
Each step has its own compliance requirements and its own document set, and the two should not be read as a single combined transaction. The DST hold period, the trust's ability to convert into an UPREIT structure, and the specific units offered are all sponsor-specific facts that belong in that sponsor's offering documents, not in a general description of how the structure can work.
Operating partnership units are not real property, and once an investor holds units instead of a DST interest or a directly owned property, the 1031 exchange chain ends for that investment. The investor can no longer exchange the units into another replacement property tax-deferred under Section 1031; a later disposition of the units, or a later redemption, is generally what triggers recognition of the originally deferred gain, though depreciation recapture and current-law text should be confirmed against IRS guidance rather than assumed.
In exchange for ending the exchange chain, the investor typically gains liquidity and diversification that direct real estate and even most DST interests do not offer. Operating partnership units are often exchangeable for REIT shares under terms set by the sponsor, and REIT shares can be more liquid than either a directly held property or an illiquid DST interest, though the terms, timing, and any lock-up period are sponsor-specific and disclosed in that sponsor's documents.
A single 1031 replacement property, or even a single DST interest, concentrates an investor's exchanged capital in one asset, one market, and one sponsor's management decisions. Operating partnership units, once converted through the 721 step, typically represent a proportional interest in a diversified portfolio of properties held by the REIT's operating partnership, spreading concentration risk across many assets rather than one.
That diversification comes with a liquidity structure of its own. Units are not necessarily redeemable on demand, and any right to exchange units for cash or REIT shares is governed by the operating partnership agreement, which may include holding periods, redemption caps, or timing restrictions. An investor moving toward the 721 step for diversification should read that agreement, not assume liquidity equivalent to a public REIT share, until the units actually convert.
Neither a 1031 exchange nor a 721 contribution eliminates the original deferred gain; both defer recognition to a later event. A 1031 exchange defers gain until a future disposition that is not itself a qualifying exchange. A 721 contribution defers the same gain until the units are sold, redeemed, or otherwise disposed of in a taxable transaction, and the investor's basis in the units carries over from the contributed property's basis, adjusted for any boot or liabilities involved in the contribution.
Because the 721 step ends 1031 eligibility, an investor who wants to keep deferring gain through repeated real estate exchanges should not take that step lightly. An investor who is comfortable never exchanging into direct real estate again, and who values diversification and eventual liquidity through units or REIT shares, is the more typical candidate for the 721 conversion.
Before completing a 721 contribution, or investing in a DST explicitly marketed with a future UPREIT conversion option, review the operating partnership agreement for redemption rights, any waiting period before units become exchangeable, the formula used to value units at conversion, and whether the sponsor has completed comparable conversions before with disclosed outcomes.
Confirm separately whether the specific DST interest under consideration actually carries a 721 conversion right, since not every DST offering includes one, and a sponsor's general marketing description of a two-step program is not a substitute for the conversion mechanics in that offering's own documents. The private placement memorandum and the operating partnership agreement, not a summary, are the controlling documents.