REIT Operating Partnership Unit

An operating partnership unit (or OP unit) is a partnership interest in a REIT’s operating partnership that can be exchanged for common shares of the REIT itself. The structure exists to allow real estate owners who want to sell or merge their properties into a REIT to defer capital-gains tax on the contribution—a significant tax incentive that encourages consolidation in the property market.

How the structure works

When a REIT is formed or wants to acquire properties, it typically does so through an operating partnership (or “OP”). The REIT itself owns a controlling interest in this partnership, but property owners and managers can contribute their real estate directly to the partnership in exchange for OP units rather than selling for cash.

Those OP units represent a claim on the partnership’s cash flows and, critically, can later be exchanged for shares of the REIT itself on a one-to-one basis (or at a ratio set at formation). Until exchange, the unit holder owns a direct stake in the real estate through the partnership vehicle.

Tax deferral and the incentive structure

This arrangement creates a powerful tax incentive. Under Internal Revenue Code Section 1031-like treatment in many contexts, when a property owner contributes their real estate to the operating partnership in exchange for OP units, no capital gains tax is triggered at the moment of contribution. The owner has simply swapped one illiquid real estate asset for another (the partnership interest), maintaining economic continuity without a taxable event.

Later, when the unit holder exchanges their OP units for REIT shares, that exchange itself is typically treated as a non-taxable reorganisation under Section 368, further deferring any tax consequence. Only when the REIT shareholder eventually sells those shares—or when the REIT itself distributes cash that exceeds basis—does a taxable event crystallise.

This deferral is not a permanent forgiveness of tax; it is a postponement. The unit holder’s cost basis carries forward into the REIT shares, so the eventual tax bill, when it arrives, includes both the original appreciation and any growth in REIT share price. But by deferring, the contributor avoids immediate liquidity pressure and can reinvest the entire economic value rather than surrendering a portion to taxes upfront.

Why founders and sponsors use OP units

REIT founders often retain a significant stake of OP units rather than immediately converting to common shares. This achieves two goals at once. First, it preserves tax deferral on their own original land or property contributions. Second, it creates a two-tier shareholder structure: common shareholders (public, if listed) who own REIT shares directly, and OP unit holders (often founders, sponsors, or property vendors) whose interests are senior in some respects to common shares.

Many REIT charters allow OP unit holders to receive distributions equivalent to REIT dividends, giving them economic participation without public share ownership. Over time, unit holders can exchange for shares, diversify, or hold indefinitely, depending on their tax and liquidity objectives.

OP units and REIT economics

The operating partnership structure also simplifies multi-asset REITs. Rather than a REIT owning properties directly (which would create consolidation and basis complications), the REIT owns a controlling stake in a partnership holding all properties. When the REIT acquires new properties from external sellers, those sellers can take OP units as consideration, avoiding a cash outlay by the REIT itself.

This mechanism has become standard in large REIT rollups and mergers. A sponsor might assemble a portfolio of properties, contribute them to an operating partnership in exchange for OP units, and then take the partnership public by floating REIT shares—all while the sponsor’s OP units remain in place, giving them a long-term equity stake aligned with public shareholders.

Conversion and exit

OP unit holders have the right (though sometimes subject to conditions) to redeem or exchange their units for REIT shares at par or a specified ratio. Once converted to REIT shares, those investors can sell on the public market if the REIT is listed, or hold for continued dividend income and appreciation.

Some REIT charters impose lockup periods or restrictions on when OP units can be exchanged, especially for founder units, to prevent excessive dilution or forced stock sales at inopportune times. The details are disclosed in the REIT’s prospectus and governing partnership agreement.

The dark side: dilution and complexity

While OP units solve genuine tax and fundraising problems, they also introduce complexity and potential dilution. Existing common shareholders own a lower percentage of the overall enterprise than they appear to, because OP unit holders’ interests are economically equivalent. If many OP units are later exchanged for shares, common shareholders face immediate dilution.

Additionally, OP unit holders who remain units—especially sponsors—sometimes retain special voting rights or veto powers over major decisions, creating a two-class structure that common public shareholders may resent.

See also