721 Exchange vs. 1031 Exchange: Which One Fits?

721 Exchange · Baker 1031 Research · Updated June 2026 · 18 min read

I keep seeing 1031 and 721 exchanges described as two ways to accomplish the same thing because both defer capital-gains tax. That is true at the surface. But they point in opposite directions: a 1031 keeps an owner in direct real estate that can be exchanged again; a 721 trades it for REIT units that generally cannot.

First-order thinking stops at the deferral. Second-order thinking asks whether the investor wants flexibility or a final transition, control or passivity, and a future exchange option or a diversified REIT position. The difference—and the one-way door at its center—determines which tool belongs in a plan and when.

Key Takeaways

• A 1031 exchange swaps one investment property for like-kind real estate, preserving direct ownership and the ability to exchange again.
• A 721 exchange, or UPREIT transaction, contributes property to a REIT operating partnership for OP units, deferring tax but ending future 1031 exchanges on that equity.
• A 721 removes 45- and 180-day deadlines but trades control and direct ownership for diversification and potential liquidity.
• Many investors use the tools in sequence: 1031 now to stay flexible, 721 later to consolidate into a REIT.

What a 1031 exchange is

A 1031 exchange, named for Section 1031, lets an investor sell investment- or business-held real property and defer capital-gains tax and depreciation recapture by reinvesting proceeds in like-kind replacement real estate. The investor continues to own real estate directly, and gain carries in the basis of the replacement property.

The maneuver can be repeated indefinitely, rolling from property to property across decades. If the final property is held until death, heirs may receive a stepped-up basis that erases deferred gain. The cost of that flexibility is work and discipline: replacement property must be identified within 45 days and acquired within 180 days, and the investor remains hands-on unless the replacement is a passive structure such as a DST. The 1031 remains the workhorse of real-estate tax deferral because it keeps the investor in the driver's seat.

What a 721 exchange (UPREIT) is

A 721 exchange takes its name from Section 721, which generally allows a tax-free contribution of property to a partnership for a partnership interest. In real estate, this operates through an UPREIT, or umbrella partnership REIT. The investor contributes property—or, more commonly today, an interest acquired through a DST—to a REIT's operating partnership and receives operating-partnership (OP) units rather than cash.

The contribution defers gain. OP units entitle the investor to distributions that track the REIT's dividends. But the investor has left direct ownership of a building and now owns a partnership interest in a diversified REIT. After a holding period, units can typically be converted to REIT shares or redeemed for cash, and either route is taxable because it triggers deferred gain.

The 721 is not a way to keep exchanging real estate. It is a way to exit active real estate for a passive, diversified vehicle while deferring tax on the way in.

The decisive difference: a one-way door

A 721 exchange is generally a one-way door. Once equity is in OP units, it cannot be 1031'd back into real estate because a partnership interest is not like-kind real property. Deferral continues inside the REIT structure, but future choices narrow to holding units, converting them taxably into shares, or redeeming them taxably for cash.

A 1031 leaves every door open. The investor can exchange again, refinance, sell, or later complete a 721 into a REIT. The sequence matters because an investor can move from direct 1031-style ownership into a 721 or REIT position later, but cannot move back. Treating a 721 as reversible is a consequential error.

Deadlines and mechanics

The two are executed differently. A 1031 is run through a qualified intermediary against a strict clock: 45 days to identify replacement property and 180 days to close, with no routine extensions. Missing a deadline fails the exchange.

A 721 is a contribution rather than a like-kind exchange. It has no 45- or 180-day deadlines. Timing follows the REIT acquisition process and negotiated terms. That can feel simpler in timing terms, but the simplicity is purchased with the loss of optionality. The 1031's deadlines are a discipline; a 721's lack of deadlines reflects a more permanent choice.

Control, liquidity, and diversification

For hands-on investors, the 1031 wins on control. The investor owns the asset and makes decisions unless a passive replacement is chosen. A 721 hands control to REIT management. The investor becomes a passive unit holder without a say over individual properties.

The 721 generally wins on diversification and potential liquidity. A directly owned property is illiquid and concentrated; OP units represent a slice of a diversified REIT portfolio. After the holding period, units can be converted to shares, liquid if the REIT is publicly traded, or redeemed.

The catch is the tax cost of liquidity. In a non-traded REIT, “liquidity” runs through limited redemption programs rather than a public market. The 721 offers a path to diversification and eventual liquidity that direct ownership lacks, but charges for it in control and one-way commitment.

Repeatability and estate planning

Both strategies support the “swap till you drop” estate path through different routes. Serial 1031 exchanges defer tax through successive properties and can pass the final property to heirs with stepped-up basis. A 721 defers into OP units; holding them until death can similarly eliminate deferred gain through the step-up.

OP units have a practical estate advantage: they are easier to divide among multiple heirs than a single building, and heirs can convert to liquid shares as needed. The difference is flexibility. A 1031 can be redirected at any sale; a 721 largely commits the investor to the REIT. A settled estate plan that values divisibility and eventual liquidity can favor the 721 endgame; an investor who values options can preserve more room through repeated 1031s. See our memo on 721 exchanges and estate planning.

When each one wins

A 1031 exchange wins when the investor wants direct real estate, control, future exchanges, or is not ready for a permanent move. It is the default for active investors and anyone seeking optionality.

A 721 exchange wins when the investor is ready to exit active ownership, seeks a diversified REIT portfolio, values estate divisibility and eventual liquidity, and accepts surrendering future 1031 flexibility.

Using them in sequence: the two-step path

The cleanest way to use both can be in order. An investor can 1031 into a DST today, defer tax, and retain flexibility. When the DST reaches full-cycle, a 721 can roll the interest into the sponsor's affiliated REIT for OP units. The two-step path preserves 1031 optionality until the investor is genuinely ready to stop exchanging and move into a diversified, semi-liquid REIT position.

The sequence runs only one way. That is its purpose: flexibility is spent deliberately at the chosen moment rather than surrendered at the outset. For many investors approaching retirement or simplification, flexible now and permanent later is the strategy.

Frequently Asked Questions

What's the main difference between a 721 and a 1031 exchange?

A 1031 keeps the investor in directly owned like-kind real estate that can be exchanged again. A 721 contributes property to a REIT operating partnership for OP units, defers tax, and generally ends future 1031 exchanges on that equity.

Can I 1031 exchange out of a 721 position later?

Generally, no. OP units are a partnership interest, not like-kind real property, so they cannot be exchanged back into real estate through a 1031. The 721 is a one-way move, which is why sequence matters.

Does a 721 exchange have 45- and 180-day deadlines?

No. A 721 is a partnership contribution rather than a like-kind exchange, so it does not have the 1031's 45- and 180-day deadlines. Timing follows the REIT acquisition process instead.

When should I use a 1031 instead of a 721?

Use a 1031 to stay in direct real estate, keep control, retain the right to exchange again, or preserve flexibility. Use a 721 when ready to leave active ownership for a diversified REIT position permanently.

Can I do both a 1031 and a 721?

Yes, often in sequence: 1031 into a DST now to defer tax and remain flexible, then 721 into the affiliated REIT at full-cycle to consolidate. The order runs only one way, so flexibility is spent deliberately.

Glossary

1031 Exchange
A like-kind exchange of investment real estate that defers capital-gains tax and can be repeated indefinitely.

721 Exchange (UPREIT)
A contribution of property to a REIT operating partnership for OP units that defers tax.

Operating Partnership (OP) Units
Units in a REIT operating partnership received in a 721 exchange and convertible into REIT shares through a taxable event.

One-Way Door
The fact that an investor in OP units generally cannot 1031 back into directly owned real estate.

Sources & References

1. Internal Revenue Code, 26 U.S.C. §1031 — the like-kind exchange that defers capital gain on directly owned real property and can be repeated.
2. Internal Revenue Code, 26 U.S.C. §721 — nonrecognition on contributing property to a partnership for OP units, the basis of the 721/UPREIT side of the comparison.
3. Treasury Regulation, 26 CFR §1.1031(k)-1 — deferred-exchange rules, including the 45-day identification and 180-day completion deadlines and the qualified intermediary mechanics described.
4. IRS, Revenue Ruling 2004-86 — treats a qualifying DST beneficial interest as like-kind real property, supporting the "1031 into a DST, then 721" sequence.

Disclosures

This memo is published by Baker 1031 for general informational and educational purposes only. It is not investment, legal, or tax advice, and is not an offer to sell or a solicitation to buy any security. 721 exchanges, REITs, and DSTs involve substantial risk including illiquidity and possible loss of principal, and private offerings are sold only to verified accredited investors via private placement memorandum under Regulation D.

Every example here is illustrative and hypothetical, included to show how the mechanics work; it is not a projection or a representation about any specific transaction, and there is no assurance any return or tax treatment (including 1031 or 721 deferral) will be achieved. Tax results depend on your individual facts and on rules that can change. Securities offered through Aurora Securities, Inc., member FINRA / SIPC; Baker 1031 Investments is independent of Aurora Securities, Inc. Consult your own CPA and attorney before acting. Securities offered through Aurora Securities, Inc. (ASI), CRD #46147, SEC #8-51322, member FINRA/SIPC. Gerald F. “Jerry” Baker, III is a registered representative of ASI (FINRA CRD #7537416). Baker 1031 Investments, LLC is independent of ASI and is not a registered broker-dealer or investment adviser.

Right now, I would preserve 1031 flexibility until the case for a permanent REIT transition is clear on its own merits. Where do you sit between control and optionality on one side, and passive diversification and eventual liquidity on the other?