721 Exchange / UPREIT: Contributing Property to a REIT Operating Partnership

Key Takeaways

What Is a 721 Exchange

A 721 exchange is a tax-deferred transaction in which a property owner contributes real estate to a REIT's operating partnership in exchange for operating partnership units (OP units). The transaction is governed by IRC Section 721(a), which provides that no gain or loss is recognized when property is contributed to a partnership in exchange for a partnership interest. The contributing partner's basis in the property carries over to become the basis in the OP units under IRC Section 722, and the deferred gain is preserved, not eliminated.

The structure is commonly called an UPREIT (Umbrella Partnership Real Estate Investment Trust). According to Goodwin, the first public UPREIT was created in the Taubman Centers 1992 IPO, and the structure has since become a cornerstone of the modern REIT industry. The REIT itself sits "above" the operating partnership that holds the real estate. The REIT owns a controlling interest in the operating partnership, while contributing property owners hold minority OP unit positions. The contributor becomes a limited partner in the operating partnership, entitled to distributions on the same economic terms as the REIT's interest, but holding a fundamentally different security than REIT common shares.

The appeal for legacy CRE owners is direct: a 721 exchange converts an illiquid, management-intensive real property position into a liquid (eventually), diversified, and professionally managed partnership interest, without triggering the capital gains tax that would result from a sale. For an investor holding a $20M industrial property with a $3M adjusted basis, a sale realizes $17M of gain. For illustration, assume $5M of that gain is unrecaptured Section 1250 gain from straight-line depreciation and the other $12M is long-term capital gain. Federal tax comes to about $4.3M: $1.25M on the Section 1250 portion at the 25% maximum rate under IRC Section 1(h), $2.4M on the rest at 20%, and $0.65M of 3.8% net investment income tax on the full $17M. State tax is extra. A 721 contribution defers that tax indefinitely and, with proper estate planning, can eliminate the gain on the units permanently.

OP Units vs REIT Shares

OP units and REIT shares are economically equivalent but legally and tax-wise distinct. This distinction is the foundation of the 721 exchange's tax efficiency, and misunderstanding it causes more confusion than any other aspect of the structure.

Table 1: OP units vs REIT shares. The critical difference: OP units preserve the contributor's carryover basis and deferred gain, while REIT shares bought for cash start with a fair-market-value basis and carry only gain from later appreciation.

The economic equivalence is maintained through a fixed conversion ratio, typically 1:1 at issuance. One OP unit has the same economic value as one REIT share and receives the same per-unit distribution. But the OP unit holder receives a K-1 (partnership tax reporting) rather than a 1099-DIV. The unitholder is taxed on its allocated share of the partnership's income, gain, loss and deductions each year, whether or not cash is distributed. Cash distributions themselves generally are not taxed; they reduce the unitholder's basis, and under IRC § 731(a)(1) gain arises only to the extent cash distributed exceeds that basis.

Built-In Gain: Section 704(c)

When property is contributed to a partnership at a value that exceeds its tax basis, the difference (the "built-in gain") must be tracked and allocated to the contributing partner. This is governed by Section 704(c) of the Internal Revenue Code, and it is the most technically important aspect of a 721 exchange for the contributor's long-term tax position.

Consider the example: an investor contributes a $20M property with a $3M adjusted basis to the operating partnership. The built-in gain is $17M. Under Section 704(c), if the operating partnership sells the property in a taxable transaction, the remaining built-in gain is allocated to the contributing partner, not shared with the other partners (including the REIT itself). While the operating partnership holds the property, Section 704(c) also governs how tax depreciation is split, and that split gradually shrinks the built-in gain.

Allocation methods

The operating partnership agreement specifies which of three IRS-approved allocation methods, established inTreasury Regulation 1.704-3(b) through (d), will be used to handle the built-in gain:

• Traditional method. The simplest approach, and the one most UPREIT deals use. Book depreciation is allocated to all partners by their ownership percentages. Tax depreciation goes first to the non-contributing partners, up to their share of book depreciation, and the contributing partner gets only what is left. Because the property's tax basis is low, there is often too little tax depreciation to go around. This "ceiling rule" caps total tax allocations at the partnership's actual tax items, so the non-contributing partners can end up with less tax depreciation than their economic share. In the regulation's own example, all of the tax depreciation goes to the non-contributing partner. The method favors the contributor, whose remaining built-in gain stays deferred until a taxable sale.
• Traditional method with curative allocations. Same as the traditional method, but the partnership can make "curative" allocations of other tax items (income, gain, or deduction from different properties) to offset the ceiling rule distortion. This helps the non-contributing partners and shifts extra taxable income to the contributor.
• Remedial method. The partnership creates notional tax deductions for the non-contributing partners and offsetting notional income for the contributing partner. This eliminates the ceiling rule distortion entirely but accelerates the contributor's taxable income. Practitioners report that it is rarely used in OP unit deals. Morrison Foerster calls the traditional method "by far the most common," with the remedial method "generally not used" because it creates phantom income for the contributor, and Goodwin reports that most tax protection agreements mandate the traditional method.

The One-Way Door

A 721 exchange is a one-way transaction from the perspective of future 1031 exchange eligibility. Once property is contributed to the operating partnership, the contributor holds OP units, which are a partnership interest. Since the TCJA, IRC Section 1031(a)(1) applies only to exchanges of real property, and Treasury Regulation 1.1031(a)-3(a)(5) lists interests in a partnership among the assets that are not real property. The contributor cannot take their OP units and do a future 1031 exchange into new real property.

This is the single most consequential feature of the 721 exchange and the one most frequently underweighted in the decision-making process. A serial 1031 exchanger who has deferred $15M of gain across four successive exchanges retains full optionality: they can continue exchanging into new properties indefinitely, selecting assets that match their investment thesis, market view, and management preferences. The moment they contribute to a 721 exchange, that optionality terminates.

The practical implications are significant:

• No future repositioning via 1031. If the REIT's portfolio shifts toward asset classes or geographies the contributor doesn't favor, the contributor cannot extract their interest and exchange into preferred real estate.
• No portfolio construction via 1031. The contributor can no longer use tax-deferred exchanges to build a custom real estate portfolio. Their CRE exposure is now determined by the REIT's investment strategy.
• REIT-level risk concentration. The contributor's entire deferred gain position is now tied to a single REIT's performance. A REIT that underperforms (through poor acquisitions, excessive leverage, or management missteps) impairs the contributor's position with no tax-efficient exit.

The one-way nature of the 721 exchange makes it an endgame strategy, not a portfolio management tool. It is best suited for investors who have decided they are done with direct real estate ownership and want to convert their illiquid CRE position into a diversified, passive, and eventually liquid holding.

Redemption Mechanics

OP units are not immediately liquid. The redemption mechanics are governed by the operating partnership agreement and subject to multiple constraints:

Holding period

Operating partnerships impose a lock-up before OP units can be redeemed. Morrison Foerster puts the typical period at six months to one year from issuance, and Goodwin describes it as commonly 12 months, sometimes shorter. During this period, the contributor receives distributions but cannot convert or liquidate the position. Separately, the disguised sale rules generally treat cash or other consideration a contributor receives within two years of the contribution as potential sale proceeds, so early redemptions need specific review.

Redemption options

After the lock-up, the contributor can tender units for redemption. The partnership agreement usually gives the REIT, not the contributor, the choice of how to settle it, and the choice changes the tax result:

• REIT acquires the units (cash or shares). The REIT, as general partner, can elect to buy the tendered units itself, paying cash or issuing REIT shares on the 1:1 conversion ratio. Goodwin reports that REITs almost always settle in shares when nothing prevents it. A REIT acquisition is a fully taxable sale of the units. A partner has a single, unitary basis in a partnership interest under Rev. Rul. 84-53 (1984-1 C.B. 159), a rule the preamble to T.D. 8902 confirms but declines to codify. Basis is therefore apportioned to the units sold rather than traced, so the contributor cannot pick "basis units" to sell first. For illustration, the examples in this article apportion it pro rata. If the REIT is listed, shares received can be sold immediately for liquidity.
• OP redeems the units with its own cash. Goodwin states the general rule: redemption is a taxable event, whether for cash or for REIT shares. JBG SMITH's tax disclosure describes the exception. If the operating partnership redeems units for cash contributed by the REIT to effect the redemption, the redemption likely is treated as a fully taxable sale of the units to the REIT. If the cash is not contributed by the REIT and the partner keeps some units, gain arises only to the extent the amount realized exceeds the partner's basis in all of their OP units. Any reduction in the partner's share of OP liabilities counts as part of the amount realized. Only this form allows cash to come out against basis first, and the contributor usually does not control whether it is used.

Redemption limitations

Redemption is not guaranteed. Common restrictions include:

• Partnership agreement limits. Per Morrison Foerster, once the lock-up ends, UPREIT holders generally can tender units at times and in amounts of their choosing, subject to the agreement's limitations. The familiar 2% monthly and 5% quarterly caps belong to non-traded NAV REIT share repurchase plans and are measured against the REIT's aggregate NAV, as in BREIT's repurchase plan. They matter if your OP units convert into a non-traded REIT's shares.
• Board discretion. A non-traded REIT's board can limit or suspend share repurchases during periods of market stress. BREIT and SREIT capped repurchases and filled less than 100% of requests beginning in November 2022, according to Blue Vault.
• Cash availability. Cash redemption is subject to the operating partnership's available cash. If the partnership's properties are generating insufficient cash flow, redemptions may be delayed or paid in installments.

Estate Planning Endgame

The most powerful application of the 721 exchange is the estate planning endgame, sometimes called "swap til you drop." The strategy works as follows:

1. Serial 1031 exchanges over a career. The investor builds and compounds wealth through a series of 1031 exchanges, deferring gain at each step. After 20–30 years, they own a $30M property with a $2M adjusted basis and $28M of cumulative deferred gain.
2. 721 contribution near retirement. The investor contributes the property to a REIT operating partnership, receiving OP units with a $2M carryover basis. The $28M gain remains deferred. The investor is now passive: no tenants, no management, no capital calls.
3. Optional partial liquidity. If the operating partnership redeems $2M of units with its own cash (not cash the REIT contributes to fund the redemption) and the investor keeps the rest, the payment is a distribution taxed only above the investor's entire $2M basis, so it can come out without gain (assuming no reduction in the investor's share of OP liabilities and no disguised sale problem). Basis then drops to zero. If the REIT instead acquires the units or funds the OP's cash, which it usually has the right to choose, the redemption is likely a sale. With basis apportioned pro rata for illustration, $2M of units is one-fifteenth of the position, so only about $133,000 of basis offsets the $2M and roughly $1.87M of gain is recognized.
4. Hold remaining OP units until death. At death, the OP units receive a basis step-up to fair market value under Section 1014 of the Internal Revenue Code. The deferred gain on the units still held at death is permanently eliminated at the unit level: a later redemption or sale of those units does not trigger it.
5. Heirs inherit stepped-up OP units. The heirs receive OP units with a fair market value basis. They can redeem the units for cash or REIT shares with no gain on the units. The step-up adjusts the heirs' basis in the units, not the operating partnership's basis in the contributed property. Under IRC Section 743, that inside basis is adjusted only if the operating partnership has a Section 754 election in effect (or a substantial built-in loss). Without one, Treasury Regulation 1.704-3(a)(7) requires built-in gain to be allocated to the transferee partner as it would have been allocated to the decedent, so a later taxable sale of the property by the operating partnership can still allocate the remaining Section 704(c) gain to the heirs. Confirm the OP's Section 754 status, or negotiate for an election, before relying on the step-up to clear the full chain of deferred gain.

Pub. L. 119-21 (signed July 4, 2025) set the basic exclusion amount for estate and gift tax at $15M per person underIRC Section 2010(c)(3), indexed for inflation after 2026, and struck the TCJA's 2026 sunset, so the amount has no scheduled expiry. A married couple can shelter $30M at the 2026 amount if both exclusions are used. That requires a portability election on the first spouse's estate tax return under Section 2010(c)(5)(A), or use of the exclusion at each death, and assumes no prior taxable gifts. Combined with the basis step-up under IRC Section 1014, a couple holding $30M in OP units with $28M of deferred gain and no other taxable estate can pass the position to heirs with no federal capital gains tax on a redemption or sale of the units and no federal estate tax, and units still held at the second death take a fair market value basis. Units the decedent held alone are stepped up in full. Community property can be stepped up in full under Section 1014(b)(6) if at least half of the community interest is in the gross estate. If the spouses hold the units as qualified joint interests (tenants by the entirety, or joint tenants with right of survivorship who are the only joint tenants), only one-half is included in the gross estate under Section 2040(b), so only that half is stepped up at the first death.

DST-to-UPREIT Two-Step

The DST-to-UPREIT pathway is a two-step transaction that combines the 1031 exchange and 721 exchange into a single exit strategy:

1. Step 1: 1031 exchange into a DST. The investor sells their property and identifies a DST interest as replacement property, completing a standard 1031 exchange. The pathway assumes a DST sponsored by, or affiliated with, the REIT whose operating partnership may later acquire the property.
2. Step 2: 721 exchange when the REIT acquires the DST. At the end of the DST hold period, the REIT's operating partnership acquires the DST property. The DST investors' beneficial interests convert to OP units in the operating partnership. This is a 721 exchange: no gain is recognized, and the carryover basis from the original 1031 exchange transfers to the OP units.

The two-step pathway is attractive because it solves the timing problem. A 1031 exchange has rigid deadlines (45 days for identification, 180 days for closing) and requires finding specific replacement property. Buying an interest in a DST that already owns its property avoids negotiating a new acquisition inside those windows. The 721 exchange happens later, on the REIT's timeline, without any deadline pressure.

But the investor controls none of the second step. The REIT's operating partnership decides if and when to acquire the DST property. If the REIT declines to acquire, because of market conditions, portfolio strategy, or capital constraints, the DST sells the property and the investor receives cash instead of OP units. That cash triggers recognition of the deferred gain unless the investor reinvests it through a new 1031 exchange, with fresh 45-day and 180-day deadlines. The two-step is a planned pathway, not a guaranteed one.

Common Mistakes

These are the errors we see most frequently in 721 exchange planning and execution:

• Treating the 721 exchange as reversible. It is not. Once property is contributed to the operating partnership, the contributor holds OP units, a partnership interest that is excluded from Section 1031 treatment. There is no mechanism to "undo" the contribution and return to direct property ownership with continued tax deferral.
• Assuming OP units are liquid. OP units are redeemable, but only after a lock-up (typically six months to a year), on terms the partnership agreement sets, and usually in a form the REIT chooses. If the units convert into a non-traded REIT's shares, that REIT's repurchase plan caps and board discretion apply too. Beginning in November 2022, BREIT and SREIT filled less than 100% of repurchase requests. Liquidity is conditional, not guaranteed.
• Ignoring the 704(c) allocation method. The operating partnership agreement specifies whether the traditional, curative, or remedial method applies. This choice affects the contributor's K-1 for every year they hold OP units. The traditional method is the market norm and is usually written into the tax protection agreement. Curative or remedial allocations can accelerate taxable income to the contributor in years when no cash distribution covers the tax.
• Failing to model the "phantom income" scenario. Phantom income is taxable income without cash to pay the tax. For a contributor, the larger triggers are usually events outside their control: a taxable sale of the contributed property by the operating partnership, a taxable merger of the operating partnership, or a reduction in OP debt that lowers the contributor's liability share. Curative or remedial allocations add a smaller annual version. These are the risks a tax protection agreement is negotiated to cover.
• Assuming the DST-to-UPREIT conversion is guaranteed. The REIT's operating partnership has no obligation to acquire the DST property. If market conditions, property performance, or REIT strategy change, the OP may decline the acquisition. DST investors then receive cash instead of OP units, which is taxable unless they complete a new 1031 exchange.
• Not coordinating with estate planning counsel. The basis step-up at death under Section 1014 is the economic engine of the 721 endgame strategy. But it requires that the OP units be included in the decedent's gross estate (which they are if the decedent still owns them at death). If the investor has transferred the units to an irrevocable trust, a family limited partnership, or another estate planning vehicle, the step-up treatment may be affected; Goodwin notes the benefit is generally not available for OP units held in trusts that are not included in the contributor's estate. Estate planning and tax counsel must coordinate, including on whether the OP has a Section 754 election.
• Misjudging debt in excess of basis. Debt above basis does not by itself trigger gain. The test is whether the net decrease in the contributor's share of liabilities, a deemed distribution under IRC Section 752(b), exceeds their basis (Section 731(a)). Take a $20M property with a $3M basis and a $5M nonrecourse mortgage that the operating partnership takes subject to. Under the three tiers of Treasury Regulation 1.752-3(a): tier 1 allocates nothing, because the property is worth far more than the debt; tier 2 allocates $2M to the contributor, the Section 704(c) gain that a sale for the $5M of debt alone would produce ($5M minus $3M); tier 3 allocates the remaining $3M under the partnership's chosen method, often profit share. The net decrease is at most $3M, which does not exceed the $3M basis, so no gain results under the default rules. The protection depends on the tier-2 allocation. If the operating partnership pays off or refinances the mortgage into debt not secured by the property, the contributor can lose that allocation and recognize up to $2M of gain unless a tax protection agreement or a guarantee keeps enough debt allocated to them. Model the liability allocation, and the disguised sale treatment of the assumed debt, before closing.

How to Model It

Modeling a 721 exchange requires a multi-year projection that captures the contribution economics, ongoing K-1 impact, redemption strategy, and estate planning endgame.

Contribution analysis

Calculate: fair market value of contributed property, adjusted basis, mortgage debt (if any), the contributor's post-contribution share of OP liabilities under the three-tier allocation, number and value of OP units received, and outside basis in the OP units. If the net decrease in liability share exceeds basis, quantify the gain and associated tax. Then test what happens to that liability share if the OP later pays down or refinances the debt.

Annual K-1 projection

For each year of the hold period, project: the contributor's share of operating partnership income/loss (based on OP unit ownership percentage), the 704(c) allocation adjustment (varies by method: traditional, curative, or remedial), the net K-1 taxable income, the cash distribution, and the difference between K-1 income and cash received (the phantom income gap). Run this for 10–20 years to capture the full built-in gain recognition pattern.

Redemption strategy

Model a phased redemption plan under both settlement forms. If the operating partnership redeems partial positions with its own cash, early redemptions can come out against basis until it is used up; if the REIT acquires the units or funds the cash, each redemption is likely a sale with basis apportioned to the units sold. Plan on the REIT's form unless the partnership agreement or a side letter gives you the choice. Calculate the tax liability at each redemption step and the net after-tax proceeds. Compare against the alternative: sell the property outright and pay the full capital gains tax immediately.

Estate planning scenario

Model the hold-until-death outcome: no further redemptions, distributions received during the hold period, basis step-up at death (OP units valued at FMV), whether the OP has a Section 754 election, estate tax calculation (against the $15M per-person exclusion, or $30M for a couple that elects portability), and the net value transferred to heirs compared to the sell-now alternative. This is the analysis that typically justifies the 721 exchange for legacy portfolios.

Comparison to continued 1031 exchanges

Model the alternative scenario: sell the current property, do another 1031 exchange, acquire new replacement property, and continue managing direct real estate for 10–20 more years. Compare the terminal wealth under 721-contribution-and-hold versus serial-1031 under realistic assumptions about replacement property returns, management costs, and the probability of a future exchange failure.

The honest question: is the tax efficiency of the 721 endgame worth the loss of 1031 optionality and the concentration in a single REIT? For an investor with $30M and $28M of embedded gain who is done with active management, the answer is typically yes. For an investor with $10M and $4M of embedded gain who enjoys building a portfolio, the answer is typically no.

Related Articles

This article is part of the 1031 exchange series. Each article covers a specific aspect of exchange structuring and replacement property strategy:

• 1031 Exchange Mechanics: Identification and Timing: The 45-day and 180-day deadlines, identification rules, and timeline management.
• Modeling the 1031 Boot, Basis Carryover, and Deferred Gain: Boot calculation, basis carryover mechanics, and deferred gain tracking.
• Reverse 1031 and Parking Arrangements: Reverse exchange mechanics when replacement property is available before the relinquished property sells.
• DST as 1031 Replacement Property: DST fee anatomy, the seven deadly sins restrictions, institutional sponsors, and the 45-day identification backstop.