The CPA's 2026 Guide to 721 Exchanges (UPREITs)

The 721 exchange is increasingly the back end of a client's deferral plan — the move from a DST into a REIT at full-cycle. It defers tax under partnership rules rather than §1031, which changes the analysis in important ways: the client becomes a partner holding OP units, with K-1 reporting, built-in-gain allocations, and a conversion event that is fully taxable. This guide covers the mechanics and the partnership-tax issues you'll advise on, the all-important one-way limitation, and a client checklist. It pairs with our client-facing 721 exchange guide.

How a 721 exchange works (advisor's refresher)

In an UPREIT, the REIT holds its assets through an operating partnership (OP), of which it is the general partner. In a 721 exchange, the client contributes real property — or, in the common two-step, a DST interest at full-cycle — to the OP in exchange for OP units. Under Section 721, that contribution is generally nonrecognition: no gain is triggered on the exchange of property for a partnership interest. The client thereafter holds units that track REIT shares economically and pay matching distributions. Unlike a §1031, there are no 45/180 deadlines, because it's a contribution rather than a like-kind exchange — but the deferral now lives under partnership (Subchapter K) rules.

Nonrecognition, basis, and §704(c)

The contributing partner takes a substituted basis in the OP units equal to the basis of the contributed property (adjusted for liabilities under §752), and the partnership takes a carryover basis in the property. Because the property usually carries built-in gain, §704(c) requires the partnership to allocate that pre-contribution gain back to the contributing partner over time (and on a later disposition of the property by the OP), preventing the shifting of the contributor's gain to other partners. For the CPA, this means the client's K-1 may reflect special allocations tied to the contributed asset, and the deferred gain can be recognized not only on the client's own actions but potentially if the OP sells the contributed property. Model these built-in-gain dynamics before recommending the structure.

Debt and disguised-sale issues

Two partnership-tax issues deserve attention. Liabilities (§752): a contribution that relieves the client of debt in excess of basis can trigger gain, so the netting of the contributed property's debt against the client's share of OP liabilities must be analyzed. Disguised sales (§707(a)(2)(B)): if the client receives cash or other consideration near the contribution (beyond qualified items), the IRS may recharacterize part of the transaction as a taxable sale rather than a tax-free contribution. These are the classic traps that turn an intended nonrecognition event into a partial recognition event; they call for careful structuring with the REIT's counsel.

OP units and ongoing reporting

While the client holds OP units they are a limited partner and receive a Schedule K-1 reporting their distributive share of the OP's income, deductions, and credits — a shift from the Schedule E reporting of a DST. Cash distributions are generally nontaxable to the extent of basis (reducing it), with §704(c) allocations layered in. Track the units' basis carefully: it drives the taxable amount on eventual conversion or redemption. Distributions economically mirror the REIT's dividend, but the partnership reporting differs from owning REIT shares directly, which clients (and sometimes their other advisors) find confusing.

The taxable conversion event

The deferral inside OP units is not permanent. When the client converts OP units to REIT shares, or redeems them for cash, the transaction is generally a taxable disposition recognizing the deferred gain (and any remaining built-in gain). Many clients convert gradually to spread the recognition across years and manage bracket and NIIT exposure. There is also no continued §1031 path from OP units — they're a partnership interest, not like-kind real property. So the conversion decision is a recognition-planning exercise you'll manage, and one clients should understand is coming.

The one-way limitation

The single most important point to convey: a 721 exchange is one-way. Once a client holds OP units, they generally cannot complete a future §1031 exchange with that equity — the partnership interest isn't like-kind real property. This forecloses the serial-1031 strategy the client may have relied on for years. It's an appropriate move for a client ready to stop exchanging and consolidate into a diversified REIT, and a poor one for a client who wants to preserve flexibility. Make sure the client makes this choice deliberately; it's covered from the client side in our 721 downsides memo.

Estate planning with OP units

The 721 has a strong estate dimension. Held until death, OP units generally receive a §1014 step-up to fair market value, which can eliminate the deferred (and built-in) gain for heirs — the partnership analog of the 1031 'swap-till-you-drop' endgame. OP units are also far more divisible among multiple heirs than a single property and can be converted to liquid shares to settle an estate. Coordinate with estate counsel: the income-tax step-up is distinct from estate-tax inclusion, and the partnership-interest character introduces its own considerations. See our estate-planning memo.

Client due-diligence checklist

• Confirm the client is ready to give up §1031 flexibility — the move is irreversible.
• Analyze liabilities (§752) — net contributed-property debt against the share of OP liabilities to avoid triggered gain.
• Screen for disguised-sale risk — scrutinize any cash or near-contribution consideration.
• Document §704(c) built-in gain and model when it may be recognized (including OP sale of the asset).
• Switch reporting to K-1 and track OP-unit basis through distributions.
• Plan the conversion — gradual recognition to manage brackets and NIIT.
• Coordinate estate planning for a potential step-up and divisibility among heirs.

What clients should know

Clients should understand that a 721 continues their deferral but changes the game: they become a partner (K-1, not Schedule E), they generally can't 1031 again, and accessing liquidity by converting units to shares or cash is a taxable event. The favorable outcomes — diversification, eventual liquidity, an estate-friendly divisible asset, and a possible step-up at death — are real, but they come with that irreversibility and partnership-tax complexity. Frame the 721 as a destination for a client ready to stop exchanging, typically reached via the two-step DST-then-721 path, not a way station.