A 721 exchange lets you contribute real estate into a partnership and receive partnership units in return without paying capital gains tax or depreciation recapture at the time of the transfer. The deferral covers both taxes, which together can otherwise take 25 to 35 percent of a property’s sale price. The most common use is contributing property into an Umbrella Partnership Real Estate Investment Trust, or UPREIT, which converts a single building into diversified partnership units that pay distributions and, if held long enough, can pass to heirs with the deferred gain permanently erased.
What You Receive in Exchange
You deed your property to an Operating Partnership (OP) that a publicly traded REIT has formed to hold its real estate. The REIT usually serves as general partner and manages the portfolio; the limited partner slots are held by everyone who has contributed property, including you. In return for your deed you receive Operating Partnership Units, known as OP units. They are equity interests in the partnership, and they are engineered to be economically equivalent to publicly traded REIT shares, generally paying the same per-unit distribution.
The REIT sits umbrella-like above the Operating Partnership, which is where the UPREIT name comes from. Your building becomes one of many assets inside a diversified portfolio, and your income shifts from rents on a single property to distributions on partnership units.
Converting Units to REIT Shares
OP units can typically be converted into publicly traded REIT shares on a one-to-one basis after a lock-up period, usually 12 to 24 months. The conversion is itself a taxable event: it recognizes the capital gains and depreciation recapture you deferred at the contribution. Most holders wait, converting only when they need liquidity or can pair the gain with offsetting losses.
What Qualifies for Deferral
The core rule is that no gain or loss is recognized when property is contributed to a partnership in exchange for a partnership interest.1Office of the Law Revision Counsel. 26 US Code 721 – Nonrecognition of Gain or Loss on Contribution It applies whether the partnership is new or already operating, and it applies whether the contributor ends up owning a large or vanishingly small share of the partnership.
The contribution has to be “property.” The IRS reads that broadly to include real estate, cash, installment obligations, and other tangible or intangible assets.2eCFR. 26 CFR 1.721-1 – Nonrecognition of Gain or Loss on Contribution Services do not qualify: a partner who receives a capital interest for services must recognize ordinary income.
Unlike a Section 351 transfer to a corporation, Section 721 has no control requirement. There is no threshold percentage of the partnership you must end up owning. A single owner can contribute one building to an Operating Partnership with thousands of existing partners and still get tax-deferred treatment.
One narrow exception matters. Section 721(b) shuts off nonrecognition if the partnership would be treated as an investment company were it incorporated. The rule targets contributions of stocks and securities that produce portfolio diversification, and real estate contributions to a standard UPREIT rarely trip it because real property is not “readily marketable” for this test. Contributions that mix real estate with securities or other liquid assets should still be run against this rule.
How Your Tax Basis Carries Over
The deferral works by tracking two basis figures. Your outside basis in the OP units starts equal to the adjusted basis you had in the contributed property, then adjusts for your share of partnership liabilities. The partnership’s inside basis in the property is also your old adjusted basis, a carryover basis.3United States Code. 26 USC 723 – Basis of Property Contributed to the Partnership
Contribute a building with a $400,000 adjusted basis and a $2 million fair market value, and your OP-unit basis starts at $400,000. The $1.6 million of built-in gain does not disappear. It stays embedded in the property inside the partnership, and it stays attached to your OP units, waiting for whatever event eventually recognizes it.
Where the Deferral Can Break: Mortgage Debt
The biggest source of unexpected tax bills in a 721 exchange is the mortgage on the contributed property. When the Operating Partnership assumes your debt, Section 752 treats the relief from that debt as a deemed cash distribution to you.4Office of the Law Revision Counsel. 26 US Code 752 – Treatment of Certain Liabilities If that deemed distribution is larger than your outside basis in the OP units, the excess is immediately taxable.5Internal Revenue Service. Liquidating Distributions of a Partners Interest in a Partnership
To keep basis high enough, the partnership allocates a share of its liabilities back to you. The mortgage on a real estate asset is almost always nonrecourse debt, which the regulations allocate across three tiers: partnership minimum gain, Section 704(c) gain, and a share of excess nonrecourse liabilities tied to profit share.6eCFR. 26 CFR 1.752-3 – Partners Share of Nonrecourse Liabilities When those allocations don’t cover your debt relief, you owe tax on the shortfall.
Personal Guarantees and the Bottom-Dollar Trap
The standard fix is a personal guarantee. You guarantee a portion of the OP’s debt, which converts that slice from nonrecourse to recourse and allocates it solely to you, restoring the basis you need.7eCFR. 26 CFR 1.752-2 – Partners Share of Recourse Liabilities The guarantee must be commercially reasonable and legally enforceable.
Watch out for bottom-dollar guarantees, which sit only on the lowest-priority slice of a debt and rarely expose the guarantor to any real payment risk. Final Treasury regulations issued in 2019 provide that bottom-dollar payment obligations generally do not create economic risk of loss and therefore do not generate the desired liability allocation. A narrow exception preserves guarantees where the guarantor stays liable for at least 90 percent of the stated obligation, and an anti-abuse rule targets multi-tiered arrangements designed to sidestep the classification. Any guarantee structure needs to be tested against these rules before you sign.
How Built-in Gain Comes Back Under 704(c)
Section 704(c) prevents you from pushing your pre-contribution gain onto other partners. It requires the partnership to allocate depreciation, gain, and loss on the contributed property in a way that accounts for the difference between its fair market value and its tax basis on the day you contributed. The regulations allow three methods, called the traditional method, the traditional method with curative allocations, and the remedial method. Each releases your deferred gain back to you on a different schedule, and large Operating Partnerships typically settle on the traditional or the remedial method. Ask which method the OP uses before you contribute, because it drives when your tax bill starts leaking back.
Other Transactions That Can Trigger Tax
Disguised Sales
If you contribute property and receive a distribution of money or other consideration within two years, in either direction, Section 707 presumes the two transfers are a disguised sale rather than a genuine contribution and distribution.8eCFR. 26 CFR 1.707-3 – Disguised Sales of Property to Partnership General Rules The presumption is rebuttable, but you carry the burden. Transfers separated by more than two years flip the presumption, though the IRS can still challenge them.
Cash or Other Consideration at Closing
Section 721 covers contributions made solely for a partnership interest. Take cash, a fixed-payment promissory note, or other property alongside the OP units and the transaction is recharacterized as a sale to the extent of that extra consideration.2eCFR. 26 CFR 1.721-1 – Nonrecognition of Gain or Loss on Contribution This is not the “boot” concept in a 1031 exchange, where partial nonrecognition survives. Under Section 721, the extra consideration risks recharacterizing the corresponding piece of the deal as a sale.
Distributions Above Outside Basis
Any cash distribution above your adjusted outside basis triggers gain.9Office of the Law Revision Counsel. 26 US Code 731 – Extent of Recognition of Gain or Loss on Distribution For a 721 contributor whose outside basis may already be thin, and remembering that Section 752 debt shifts count as deemed distributions toward this threshold, the risk is not academic.
The Seven-Year Rule
If you contribute appreciated property and then, within seven years, receive a distribution of other property (not cash) from the partnership, Section 737 can force you to recognize gain equal to the lesser of the excess of that distributed property’s value over your basis, or your net precontribution gain.10Office of the Law Revision Counsel. 26 US Code 737 – Recognition of Precontribution Gain in Case of Certain Distributions to Contributing Partner The rule blocks contributors from swapping into a basis-shifted asset and walking away tax-free.
The Exit: Convert, Hold, or Pass to Heirs
The choices at the back end are what make the strategy attractive. Convert your OP units to REIT shares, and the deferred gain comes due. Hold the units, and you collect distributions while the deferral continues.
Hold them until death, and Section 1014 gives your heirs a basis equal to fair market value at the date of death.11Office of the Law Revision Counsel. 26 US Code 1014 – Basis of Property Acquired From a Decedent The entire deferred capital gain and depreciation recapture effectively vanish. Your heirs can then convert to REIT shares or redeem the units without carrying your embedded gain. This is the reason many owners contribute rather than sell. Estate tax on the value of the units is a separate consideration, but the income tax deferral converts into permanent income tax savings.
Investors who need liquidity before that point sometimes convert in stages across several tax years, spreading the gain and pairing it with losses or charitable strategies.
721 vs. 1031
Both defer capital gains, but they work differently. A 1031 exchange swaps one property for another of like kind, with a 45-day identification deadline and a 180-day closing deadline. Miss either by a day and the deferral collapses. A 721 exchange has no timing rules of that kind because it is a contribution to a partnership, not an exchange of like-kind property.1Office of the Law Revision Counsel. 26 US Code 721 – Nonrecognition of Gain or Loss on Contribution
The tradeoff is flexibility. After a 1031 exchange you still own real property and can do another 1031 later. A 721 exchange is one-way: once your property is inside the Operating Partnership, you hold OP units, not real estate, and you cannot do a subsequent 1031 with those units. You have traded direct control for diversification, passive income, and the stepped-up basis path.
The DST Bridge for Smaller Investors
Some investors combine the two using a Delaware Statutory Trust. You do a traditional 1031 exchange first, selling your property and reinvesting the proceeds into fractional interests in a DST that holds institutional real estate and is structured to participate in a future UPREIT transaction. When the DST reaches the end of its cycle, its assets are contributed to a REIT through a 721 exchange, and DST investors receive OP units. That two-step path opens UPREITs to investors whose single property could not clear the typical minimum a REIT will accept directly.
Limits Worth Knowing Before You Commit
OP units are not publicly traded. Until you convert, you cannot sell them on an exchange, and the partnership agreement will limit transfers. The lock-up before conversion is typically one to two years, during which distributions are your only source of cash from the investment.
Conversion recognizes the full deferred tax at once unless you space it out across years. That timing decision usually turns into a multi-year planning question tied to your other income and gains.
Finally, state and local transfer taxes can apply to the contribution itself. Some jurisdictions treat the transfer to an Operating Partnership as exempt because beneficial ownership hasn’t really changed; others treat it as a taxable change of ownership. On a high-value property that cost is material and needs to be checked in the jurisdiction where the building sits before you close.