A Section 721 exchange and a Section 1031 exchange both let an owner move out of a specific piece of real estate without triggering capital gains tax at the time of the transaction. Past that shared starting point, they are structurally different transactions. A 1031 exchange trades one piece of directly owned real estate for another: the owner sells the relinquished property, identifies replacement real estate within 45 days, closes within 180 days, and ends up holding a new deed. A 721 exchange, sometimes called an UPREIT contribution, trades the property itself for units in an operating partnership that owns a portfolio of real estate. The owner ends up holding OP units, not a deed, and those units are eventually convertible into shares of the REIT that controls the operating partnership.

Both defer gain under different code sections, and both carry restrictions on how and when that deferral ends. The right path depends on how much an owner wants to keep managing a specific asset versus hold a diversified, professionally managed interest, and how much illiquidity the owner is willing to accept in exchange for giving up that management burden.

Section 1031 imposes strict timing: identify replacement property within 45 days of closing the sale, close on it within 180 days, use a qualified intermediary to hold proceeds, and buy real property of equal or greater value and equity to defer the full gain. Miss a deadline, take receipt of cash, or buy property that is not like-kind, and some or all of the gain becomes taxable in that year.

Section 721 does not run on the 45/180-day like-kind exchange clock at all. The owner contributes real property directly to an operating partnership in exchange for OP units under a contribution agreement negotiated with the REIT sponsor. There is no requirement to source a separate replacement property, no like-kind property test to satisfy, and no qualified intermediary in the 1031 sense, but the transaction depends entirely on the operating partnership agreeing to accept that specific property on negotiated terms.

A 1031 exchange ends with the owner holding a new, specific property, with all the same rights and responsibilities as before: setting rent, choosing tenants, deciding on capital improvements, and controlling the timing of any future sale or exchange. The tradeoff is that the owner has to find, underwrite, and manage that new property.

A 721 contribution ends with the owner holding units in a partnership that owns many properties, none of which the unit holder controls individually. Leasing, financing, capital allocation, and disposition decisions belong to the REIT's management team and board, not to the contributor. An owner exchanges direct control over one asset for indirect exposure to a portfolio managed by people whose track record and incentives the owner has evaluated once, at contribution, rather than something the owner can revisit deal by deal.

Replacement property from a 1031 exchange is a direct real asset. It can be refinanced, improved, sold outright, or exchanged again into another property whenever the owner chooses, subject to market conditions and financing availability. It concentrates the owner's exposure in whatever property was actually bought, unless the exchanger deliberately spreads proceeds across a DST interest or a tenancy-in-common structure.

OP units from a 721 contribution are illiquid by design. There is no public market for them, and most operating partnership agreements impose a holding period before conversion rights to REIT shares vest, plus redemption restrictions that limit when and how a holder can cash out. In exchange for that illiquidity, the contributor gets instant diversification across the REIT's existing portfolio rather than concentrated exposure to a single replacement property, which changes the risk profile substantially even before any tax consequence is considered.

Both structures defer gain rather than eliminate it, and both have a specific event that ends the deferral. In a 1031 exchange, the deferred gain becomes taxable when the owner eventually sells the replacement property without exchanging into another one, or receives cash or non-like-kind property (boot) in a later transaction. Depreciation recapture rules under Section 1250 continue to apply throughout, and the deferred gain carries forward in the replacement property's adjusted basis.

In a 721 contribution, the deferral ends when the OP units are redeemed for cash, or converted to REIT shares and those shares are later sold. Until one of those triggering events happens, the original gain from the contributed property stays deferred, tracked through the unit holder's basis in the partnership interest. Neither path produces a permanent tax-free result; both simply move the taxable event to a later transaction the owner controls, or in the 721 case, that the operating partnership's redemption terms control in part.

An owner who wants to stay in direct control of a specific property, keep financing flexibility, and preserve the option to exchange again indefinitely is describing a 1031 transaction. An owner who is tired of active management, wants exposure spread across a diversified portfolio instead of one asset, and is comfortable trading liquidity and control for that diversification is describing a 721 contribution. Some owners use both over time, moving into a DST as 1031 replacement property first, then later executing a 721 contribution of that DST interest into an operating partnership once the trust disposes of the underlying asset. That sequencing does not skip the requirements of either code section; it simply uses them in order.