721 Exchange vs. 1031 Exchange: Which One Fits?

The 721 exchange and the 1031 exchange are often discussed as if they were two flavors of the same thing, because both let a real estate owner defer capital gains tax. But they pull in opposite directions. A 1031 exchange keeps you in directly owned real estate that you can exchange again and again; a 721 exchange moves you out of direct ownership and into units of a real estate investment trust, usually for good. Understanding that difference — and the one-way door at the heart of it — is the key to knowing which belongs in your plan, and when.

What a 1031 exchange is

A 1031 exchange, named for Section 1031 of the tax code, lets you sell real property held for investment or business and defer the capital gains tax — and depreciation recapture — by reinvesting the proceeds into "like-kind" replacement real estate. You continue to own real estate directly; the gain rides along in your carried-over basis. Crucially, you can repeat the maneuver indefinitely, rolling from property to property across decades, and if you hold the final property until death, your heirs may receive a stepped-up basis that erases the deferred gain.

The cost of that flexibility is work and discipline: you must find and close on replacement property within strict 45-day identification and 180-day completion windows, and you remain a hands-on owner unless you exchange into a passive structure like a DST. The 1031 is the workhorse of real estate tax deferral precisely because it keeps you in the driver's seat.

What a 721 exchange (UPREIT) is

A 721 exchange takes its name from Section 721, which generally makes it tax-free to contribute property to a partnership in exchange for a partnership interest. In real estate, this is the UPREIT ("umbrella partnership REIT") structure: you contribute your property — or, more often today, your interest acquired through a DST — into a REIT's operating partnership, and in return you receive operating-partnership (OP) units rather than cash. The contribution defers your gain, and the OP units entitle you to distributions that track the REIT's dividends.

The trade is fundamentally different from a 1031. You are no longer a direct owner of a building; you hold a partnership interest in a diversified REIT. After a holding period, OP units can typically be converted into REIT shares or redeemed for cash — but doing so is a taxable event that triggers the deferred gain. The 721 is less a way to keep exchanging real estate than a way to exit active real estate into a passive, diversified vehicle while deferring tax on the way in.

The decisive difference: a one-way door

If you remember one thing, remember this: a 721 exchange is generally a one-way door. Once your equity is in OP units, you cannot 1031 it back out into real estate — a partnership interest is not like-kind real property. The deferral continues only inside the REIT structure, and your future options narrow to holding the units, converting them (taxably) to shares, or redeeming them (taxably) for cash.

A 1031 exchange, by contrast, leaves every door open. You can exchange again, refinance, sell, or eventually 721 into a REIT if you choose. This asymmetry is why sequencing matters so much: you can always move from 1031-style direct ownership into a 721/REIT position later, but you cannot move back. Treating the 721 as reversible is the most consequential mistake investors make in this area.

Deadlines and mechanics

The two also differ in how they're executed. A 1031 is an exchange run through a qualified intermediary against the clock: 45 days to identify replacement property, 180 days to close, with no routine extensions. Miss a deadline and the exchange fails. A 721, being a contribution rather than a like-kind exchange, doesn't carry those 45- and 180-day deadlines — the timing is governed by the REIT's acquisition process and any negotiated terms instead.

That difference can make a 721 feel simpler, and in pure timing terms it often is. But the simplicity is bought with the loss of optionality described above. The 1031's deadlines are a discipline; the 721's lack of them reflects that you're making a more permanent move.

Control, liquidity, and diversification

On control, the 1031 wins for hands-on investors: you own the asset and make the decisions (unless you've chosen a passive replacement). The 721 hands control to the REIT's management — you become a passive holder with no say over individual properties.

On liquidity and diversification, the 721 generally wins. A single directly owned property is illiquid and concentrated; OP units represent a slice of a diversified REIT portfolio, and after the holding period they can be converted to shares (liquid, if the REIT is publicly traded) or redeemed. The catch is the tax cost of accessing that liquidity, and — for non-traded REITs — that "liquidity" runs through limited redemption programs rather than a public market. So the 721 offers a path to diversification and eventual liquidity that direct ownership lacks, at the price of control and the one-way commitment.

Repeatability and estate planning

Both strategies support the "swap till you drop" estate play, but along different routes. With serial 1031 exchanges, you defer through successive properties and pass them to heirs with a stepped-up basis. With a 721, you defer into OP units and hold those until death; the step-up can likewise eliminate the deferred gain, and OP units carry a practical advantage for estates — they're far easier to divide among multiple heirs than a single building, and heirs can convert to liquid shares as needed.

Where they diverge is flexibility along the way. The 1031 path can be redirected at any sale; the 721 path, once taken, largely commits you to the REIT. For an investor whose estate plan is settled and who values divisibility and eventual liquidity for heirs, the 721 endgame is attractive; for one who wants to keep options open, repeated 1031s preserve more room to maneuver. We cover this in depth in our memo on 721 exchanges and estate planning.

When each one wins

Reduce it to goals. A 1031 exchange wins when you want to stay in direct real estate, retain control, keep the ability to exchange again, or simply aren't ready to make a permanent move — it is the default for active investors and for anyone who wants to preserve optionality. A 721 exchange wins when you're ready to exit active ownership for good, want the diversification of a REIT portfolio, value divisibility and eventual liquidity for your estate, and accept that you're trading away future 1031 flexibility to get there.

Using them in sequence: the two-step path

The cleanest way to get the best of both is often to use them in order. An investor can 1031 into a DST today — staying flexible and deferring tax — and then, when that DST goes full-cycle, use a 721 exchange to roll into the sponsor's affiliated REIT for OP units. This "two-step" sequence lets you keep 1031 optionality for as long as you want it, then transition into a diversified, semi-liquid REIT position when you're genuinely ready to stop exchanging.

The sequence only runs one way, which is exactly the point: you spend your flexibility deliberately, at the moment of your choosing, rather than surrendering it up front. For many investors approaching retirement or simplification, that ordering — flexible now, permanent later — is the whole strategy.

Frequently Asked Questions

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's operating partnership for OP units, deferring tax.

Operating Partnership (OP) Units

Units in a REIT's operating partnership received in a 721 exchange, convertible to REIT shares in a taxable event.

One-Way Door

The fact that, once in OP units, you generally cannot 1031 back into directly owned real estate.

Disclosures