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

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), a structure first pioneered by Taubman Centers in its 1992 IPO and subsequently adopted by Simon Property Group and most major publicly traded REITs. 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 would generate approximately $4M in combined federal and state capital gains tax. A 721 contribution defers that $4M indefinitely and, with proper estate planning, can eliminate it 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 are acquired at fair market value with no embedded gain.

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, and the distributions may be characterized differently for tax purposes — including return of capital, ordinary income, and capital gain components that depend on the partnership's underlying operations.

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), when the operating partnership eventually sells the property or allocates depreciation deductions, the $17M built-in gain must be recognized by the contributing partner — it cannot be shared with or shifted to other partners (including the REIT itself).

Allocation methods

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

• Traditional method. The simplest approach. Book depreciation is allocated to all partners based on their ownership percentages, but tax depreciation on the contributed property is allocated entirely to the contributing partner up to the amount of book depreciation. The gap between book and tax depreciation creates a "ceiling rule" effect — the non-contributing partners may receive less tax depreciation than their economic share. This method favors the contributing partner (slower gain recognition) but creates distortions for other partners.
• 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 smooths out the impact on non-contributing partners at the cost of more complex K-1 reporting.
• Remedial method. The partnership creates notional tax items to offset the ceiling rule distortion. The contributing partner is allocated additional taxable income to match the non-contributing partners' shortfall. This eliminates the distortion entirely but accelerates the contributing partner's gain recognition. Most institutional operating partnerships use the remedial method because it prevents distortions from compounding across a portfolio with many contributed properties.

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 — a partnership interest. Partnership interests are explicitly excluded from Section 1031 like-kind exchange treatment under IRC Section 1031(a)(2)(D), a provision that survived the TCJA amendments unchanged. 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

Most operating partnerships impose a lock-up period of 12–24 months before OP units can be redeemed. During this period, the contributor receives distributions but cannot convert or liquidate the position. Some partnerships impose longer lock-ups — 36 months is not uncommon for large contributions — to ensure the contributor has sufficient holding period for the exchange to withstand IRS scrutiny.

Redemption options

After the lock-up, the contributor can typically request redemption through one of two mechanisms:

• Cash redemption. The operating partnership pays cash for the redeemed OP units. The amount is based on the REIT share price at the time of redemption (1:1 conversion ratio). This is a taxable event — the contributor recognizes gain equal to the difference between the cash received and the carryover basis allocated to the redeemed units. Strategically, contributors can redeem basis first: if 15% of the OP units represent carryover basis, the first 15% of units redeemed may generate no taxable gain (return of capital), with all gain concentrated in the remaining 85%.
• REIT share conversion. The REIT has the option (in most partnership agreements, not the contributor) to satisfy a redemption request by issuing REIT shares instead of cash. This is also a taxable event — the contributor recognizes gain as if they had received cash. But the shares are publicly traded (if the REIT is listed), providing immediate liquidity if the contributor wants to sell.

Redemption limitations

Redemption is not guaranteed. Common restrictions include:

• Quarterly volume caps. The operating partnership may limit total redemptions to 2–5% of outstanding OP units per quarter, protecting the REIT from large outflows.
• Board discretion. The REIT's board can suspend redemptions during periods of market stress, capital constraints, or portfolio repositioning. This happened at several non-traded REITs in 2022–2023 when redemption requests exceeded liquidity.
• 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. Partial redemption of basis tranche. The investor redeems the portion of OP units representing the $2M carryover basis, receiving $2M in cash as a tax-free return of capital. This provides liquidity without triggering gain.
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 $28M deferred gain is permanently eliminated — it is never recognized by the decedent or the heirs.
5. Heirs inherit stepped-up OP units. The heirs receive OP units with a fair market value basis. They can redeem for cash or REIT shares with no built-in gain. The entire chain of deferred gains — accumulated over decades of 1031 exchanges — disappears.

The One Big Beautiful Bill Act (signed July 2025) made the $15M per-person estate and gift tax exemption permanent, resolving the uncertainty created by the 2017 TCJA's original sunset provision. This means a married couple can pass up to $30M in assets — including OP units — to heirs without federal estate tax. Combined with the basis step-up under IRC Section 1014, a couple holding $30M in OP units with $25M of deferred gain can transfer the full position to heirs with zero capital gains tax and zero estate tax.

DST-to-UPREIT Two-Step

The DST-to-UPREIT pathway is an increasingly common 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 DST is typically sponsored by a REIT or an entity affiliated with a REIT.
2. Step 2: 721 exchange when the REIT acquires the DST. At the end of the DST hold period (typically 5–7 years), 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. The DST closes in 3–5 business days and meets these requirements. 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 investor receives a cash distribution at property sale instead of OP units. That cash distribution triggers gain recognition on the entire deferred amount. 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 redemption is subject to holding periods (12–24 months), quarterly volume caps (2–5% of outstanding units), and board discretion. During the 2022–2023 period, several non-traded REITs suspended or severely limited OP unit and share redemptions. 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. Remedial method — used by most institutional operating partnerships — can accelerate taxable income to the contributing partner in years when no cash distribution covers the tax liability.
• Failing to model the "phantom income" scenario. Under the remedial method, the contributing partner may receive K-1 income allocations that exceed their cash distributions, creating a tax liability without corresponding cash to pay it. This is called "phantom income" and it is particularly common in the early years of the contribution when depreciation differences are largest.
• 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 receive cash (taxable) instead of OP units (tax-deferred).
• 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, as partnership interests). 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. Estate planning and tax counsel must coordinate.
• Contributing property with debt in excess of basis. If the contributed property has mortgage debt exceeding the contributor's adjusted basis, the debt relief is treated as a deemed distribution under IRC Section 752(b), triggering gain recognition under Section 731(a) on the excess. An investor contributing a $20M property with a $3M basis and $5M of debt has $2M of excess debt over basis, potentially triggering a $2M taxable gain at contribution. This must be modeled 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), debt-over-basis test (Section 731 boot risk), number and value of OP units received, and carryover basis in OP units. If debt exceeds basis, quantify the immediate gain and associated tax liability.

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: basis tranche first (return of capital, no gain), then gain tranche in subsequent years (gain recognition at prevailing tax rates). 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 redemption of gain tranche, distributions received during the hold period, basis step-up at death (OP units valued at FMV), estate tax calculation (against the $15M/$30M exemption), 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 $25M 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.