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What Are OP Units? Ownership, Taxes, Payments, and Exit Rules

By Jerry Baker

OP units are ownership interests in an operating partnership, often the partnership through which a REIT holds real estate. They can be received in a qualifying property contribution, but their tax rules, voting rights, cash payments, and exit terms differ from owning the property or REIT shares directly.

What do OP units actually represent?

OP stands for operating partnership. A unit is a way to measure an ownership interest in that partnership. It is not a deed to an apartment, a slice of a particular building, or a promise to repay a fixed dollar amount.

In a common UPREIT structure, a REIT owns an interest in the operating partnership and controls it as the general partner. Other owners may hold limited partnership units. The partnership and its subsidiaries hold the real estate.

The structure creates two distinct investments: shares in the REIT and units in its operating partnership. They may share similar economics under the documents. That does not make them the same legal interest.

I would start by drawing the ownership chain. Put your name next to the interest you will receive. Then identify the entity that owns the buildings, the entity that owes each loan, and the entity responsible for managing the business.

If those names are blurred together in a presentation, ask for a clearer version. You should know what you own before discussing what it might earn.

How a property owner may receive OP units

A property owner may contribute real estate to a partnership in return for units. Section 721 generally provides nonrecognition treatment for a contribution of property in exchange for a partnership interest. The receiving partnership can be new or already operating. [1]

Nonrecognition means a qualifying contribution generally does not trigger gain at that moment. It does not mean the old gain has vanished. The tax basis and built-in gain need to be tracked after the transfer.

Other rules can change the result. Cash received, liability changes, a disguised sale, or the investment-company exception may create current tax. Services paid for with an interest also need a different analysis from a property contribution. [1] [2]

Sometimes the discussion begins with a DST and a possible later contribution to an operating partnership. Those are separate steps. Review who decides whether the later step happens, what you receive, and whether you have a choice.

Do not assume the words “721 option” give you the right to demand a contribution on a date you choose. Read the actual agreement and have your tax advisers review the full plan.

OP units and REIT shares are different

QuestionOP unitsREIT shares
What do you own?An interest in the operating partnershipAn interest in the REIT itself
Where are your rights defined?Partnership agreement and related documentsCorporate or trust documents and share terms
How might you exit?Permitted transfer, redemption, or exchange under the unit termsA market sale or a share program, if available
What tax records may you receive?Generally a partnership Schedule K-1Generally dividend reporting for U.S. taxable shareholders
Can value and payments change?YesYes

This is a starting comparison, not a summary of every program. A publicly traded REIT share has a different exit market from a nontraded share. A unit may have several conditions before it can be exchanged for either.

Prologis's October 2025 prospectus expressly distinguishes common stock from operating partnership units. It explains differences in rights and taxes and warns that exchanging its units for shares is a taxable sale for the holder. That is a dated example of actual terms, not a description of every OP program. [3]

How many units do you receive?

The unit count depends on the value credited to you and the agreed unit price. Start with a complete value bridge. Do not divide gross property value by a share price and stop there.

Consider an original hypothetical example:

Pricing itemAmount
Agreed gross property value$4,000,000
Debt deducted in the pricing agreement$1,500,000
Agreed owner charges$100,000
Net amount credited for units$2,400,000
Agreed issue price per unit$30
Units issued80,000

The calculation is $2.4 million divided by $30. Using the $4 million gross value instead would overstate the unit count. Actual transactions may use other adjustments or a different pricing method.

This calculation is not your tax basis. It is also not proof that $30 is fair value or that you can sell a unit for $30. Ask what supports the price, when it is measured, and whether it can change before closing.

Compare rights as well as numbers. Receiving more units does not improve the deal if each unit has weaker terms or is priced differently.

Read the class of units, not just the label

Common units, preferred units, and incentive units can have different rights. Even two classes called common units may have different fees, conversion terms, or timing rules.

I would ask for a short comparison of all classes that can stand ahead of you or share in the same cash. Who gets paid first? Which payments can accumulate? Who participates in growth? What happens if there is not enough cash to pay everyone?

A preferred payment rate is not the same as a bank obligation. Read whether payments are required, can be deferred, or depend on available funds. Ask what remedies exist after a missed payment.

Also ask about new units. Management may have authority to raise more capital or issue interests for acquisitions or compensation. The agreement should explain the process and any limits.

Your percentage can fall without the value of your interest falling by the same amount. New capital may add assets too. For example, 100 units out of 1,000 are 10%. If 250 new units are issued, 100 out of 1,250 are 8%. Whether that hurts you economically depends on the value and terms received for the new units.

Control deserves a separate check. Ask which matters require your consent and which management can decide without you. Selling a building, adding debt, changing a service provider, and issuing another class of units may have different approval rules.

Also ask how you receive reports and raise concerns. A right to receive information is different from a right to block a decision. If keeping a specific property or controlling its sale date matters to your family, have counsel determine whether the documents protect that goal. Do not rely on an informal plan to hold the asset forever.

How cash distributions work

Cash payments depend on the partnership's operations, financing, reserves, expenses, and distribution terms. A scheduled payment is not proof of a guaranteed return.

Some programs link common unit payments to common share dividends. Postal Realty Trust describes that approach in its current investor FAQ: its OP holders receive cash per unit equal to the per-share common dividend. The same FAQ says redemption is subject to its partnership terms and can involve cash or shares at the company's discretion. Those are company-specific descriptions. [4]

Before using income in a household budget, ask how the payment is funded. Compare current property cash flow with borrowing costs, capital needs, and payments to other classes. Separate cash earned from cash borrowed or raised from investors.

For a hypothetical illustration, 80,000 units paying $1.50 per unit annually would distribute $120,000. Against a $2.4 million initial credited amount, that is a 5% cash rate. If the payment falls to $1.20, cash falls to $96,000, or 4% of that initial amount.

These are simple calculations, not a forecast. They leave out personal tax, future unit value, and any exit costs. A 5% payment is not automatically a 5% total return.

The tax result may not match the cash payment

A partnership generally passes tax items through to its partners. The IRS's K-1 instructions explain that you may owe tax on your share of income even if it is not distributed. [5]

This makes the bank deposit and the tax report two separate things to review. Depreciation and other deductions can reduce reported income. A property sale or other event can increase it. Your personal ability to use losses has its own limits.

Suppose a hypothetical investor receives $40,000 of cash but is allocated $25,000 of taxable income. Do not assume the remaining $15,000 is permanently exempt income. Distributions and tax items affect basis under separate rules.

Now reverse the example: $25,000 of cash and $40,000 of taxable income. The investor needs to plan for tax that is not measured simply by the cash received. Neither example gives a tax rate or promises a tax outcome.

Ask when the partnership expects to provide the K-1 and state information. Tell your CPA which states are involved, and ask about filing duties, withholding, and credits. Do not assume living in a state without personal income tax removes every state issue.

Your basis is a running tax record

The basis of your partnership interest is often called outside basis. The partnership also has basis in its assets, often called inside basis. Market value, capital-account balances, and these tax bases can be different.

The IRS describes a contributed interest's starting basis using cash and adjusted basis of property, with other required adjustments. Income, losses, distributions, and changes in allocated liabilities can change outside basis over time. A book capital account is not a substitute for this calculation. [2]

Here is a simplified annual illustration. Start with $900,000 of outside basis. Add $30,000 of allocated taxable income. Subtract a $50,000 cash distribution. If there are no other adjustments, ending basis is $880,000.

That is a tax record. It does not say the interest is worth $880,000 or that the investor lost $20,000 economically. Actual records may also include losses, nondeductible expenses, debt changes, and partner-specific adjustments.

I would want the CPA to keep a clear annual schedule. It is much easier to update a file each year than to recreate a decade of changes when you want to sell.

Your property's old gain can follow you

A contribution can bring appreciated property into the partnership without resetting its tax basis to market value. The IRS explains that allocations must account for the difference between contributed value and basis. These rules are commonly discussed under Section 704(c). [2]

For a simple example, property worth $3 million with $1 million of adjusted basis carries a $2 million difference. A qualifying contribution does not make that difference disappear. Later events and the partnership's allocation method affect how it is handled.

Ask what happens if the partnership sells the contributed property. Ask how depreciation is allocated and whether the agreement includes any tax protection. A business decision that benefits the overall portfolio may produce a tax result you did not expect.

A tax-protection agreement needs careful reading. Who is protected, for how long, from which events, and with what remedy? Does it prevent an action or require a payment after it happens? Are there exceptions or limits?

Have counsel review the actual promise and the party responsible for honoring it. The phrase “tax protection” is not a guarantee that no tax can arise during the holding period.

Debt affects economics and tax in different ways

Start with the economic risk: property debt must be serviced or refinanced. Higher borrowing costs, a maturity, or a lender restriction can reduce the cash available to units.

Then review the tax allocation. A decrease in a partner's share of liabilities is treated as a money distribution for this purpose and can create gain when it exceeds the relevant basis. The allocation is not always a simple ownership-percentage calculation. [2] [5]

For illustration, assume a $100,000 net deemed money distribution from a liability change and $70,000 of relevant basis before that distribution. With no other adjustments or special rules, the excess is $30,000. That can produce gain without a $100,000 check arriving.

Have the tax team calculate the real numbers. Separate lender release from tax allocation. An agreement between you and the partnership does not by itself establish that your old lender has released a personal guaranty.

Redemption is a process with conditions

Read the exit clause before treating OP units as liquid. It should identify when requests can begin, who chooses cash or shares, how value is measured, and which limits can delay or restrict a transaction.

The October 2025 Prologis prospectus illustrates why details matter. It describes different initial periods for certain common and performance units, an option to settle with shares, and conditions on redemption. Its stated one-for-one relationship is subject to specified adjustments. Do not import those terms into another program. [3]

I would turn the clause into a practical timeline: earliest request date, notice period, pricing date, settlement date, and the point when shares could actually be sold. Then ask which parts the issuer can change or suspend under the documents.

If settlement can be in nontraded shares, ask how those shares can later be sold. Receiving another security is not the same as receiving spendable cash.

Plan for the case in which you cannot exit on your preferred date. The SEC warns that private placements can be difficult to resell and can involve substantial or total loss. An accredited-investor designation does not remove those risks. [7]

Selling units or receiving shares may trigger tax

A sale of a partnership interest generally measures gain using the amount realized less adjusted outside basis. Liability relief can be part of the amount realized. Some components may receive ordinary-income treatment rather than a single capital-gains rate. [2]

For an original illustration, assume a taxable sale produces $600,000 of cash and $200,000 of liability relief. With $500,000 of adjusted outside basis, the simple gain is $300,000 before other adjustments: $800,000 minus $500,000.

Tax is not simply a percentage of the check. Nor is it always a percentage of the difference between today's unit price and the price assigned at contribution.

If you receive shares instead of cash, get the tax estimate before the exchange. In the Prologis example, the filing warns of tax on a unit-for-share exchange and possible limits on selling shares to fund it. [3]

A partial redemption also requires a careful allocation of basis and liabilities. Keep the remaining interest's records current. Do not apply an informal flat tax estimate to each request and assume the accounting will sort itself out.

OP units generally change your future 1031 options

Ordinary partnership interests do not qualify as real property for Section 1031. The regulation has a narrow exception for a partnership with a valid Section 761(a) election; that is not a general permission to exchange ordinary UPREIT units. [6]

The partnership may make its own property decisions, including a qualifying exchange of real estate where the rules allow. That is different from your right as a unitholder to sell units and direct a personal 1031 exchange.

If continued personal exchange flexibility is central to your plan, discuss that before accepting units. Do not assume a later distribution of property will be available, simple, or tax-free. The agreement and partnership tax rules need a separate review.

Family planning still needs legal and tax work

Units can be easier to divide than a building, but a gift or inheritance still requires review. Check permitted transfers, consent requirements, records, and the recipient's rights.

Do not assume gifting and inheritance produce the same basis result. Also distinguish the heir's basis in units from the partnership's basis in the buildings. Publication 541 explains that a partner's death does not generally change the partnership's asset basis by itself, though an adjustment may be available through the applicable election and rules. [2]

Have the estate attorney and CPA coordinate with the partnership. Ask what documents, valuation work, and elections may be needed. A broad promise about eliminating taxes for heirs leaves too many important questions unanswered.

Build a decision file before accepting units

I would collect the contribution agreement, partnership agreement, current financial reports, unit-class terms, redemption provisions, and any tax-protection agreement. Add the value calculation and your CPA's tax analysis.

Write down what you gain and what you give up. Less direct property work may appeal to you. Less control over sales, debt, taxes, or exit timing may matter just as much.

The decision should work under a disappointing scenario too. Consider a lower payment, falling unit value, delayed exit, or tax due without matching cash. If that combination would upset your plans, resolve it before the contribution.

Frequently asked questions

Are OP units REIT shares?

No. They are interests in the operating partnership. Shares are interests in the REIT. Similar payments or a stated exchange ratio do not make the rights and taxes identical.

Does one OP unit always become one REIT share?

No universal rule requires that. Read the class terms, ratio, adjustment provisions, holding period, and redemption conditions. Some programs use a one-for-one relationship, but it is a contractual feature.

Can I owe tax while keeping my units?

Yes. Allocated income, a property sale, distributions above basis, or liability changes can create tax while you still hold units. The K-1 instructions expressly warn that partnership income may be taxable without a matching distribution. [5]

Are OP unit payments guaranteed?

No general guarantee comes with the label. Review cash sources, expenses, debt, reserves, other classes, and the payment terms. A stated distribution rate is not the same as a promised total return.

Can I redeem units whenever I need cash?

Only as the applicable terms allow. There may be waiting periods, conditions, pricing rules, or settlement in shares. Confirm the full path to spendable cash and plan for delays.

Can I use a 1031 exchange when selling OP units?

Ordinary OP partnership interests generally are not qualifying 1031 real property. A partnership-level real estate exchange is a different transaction from your sale of units. Get advice before giving up direct exchange flexibility. [6]

What should I check first in an OP unit proposal?

Identify the issuer, unit class, net value credited, tax basis, allocated debt, cash terms, control rights, and exit process. Then compare the full proposal with your goals and other choices. A possible tax benefit should not carry the entire decision.

Sources and references

  1. Electronic Code of Federal Regulations / Treasury. 26 CFR 1.721-1: Nonrecognition of gain or loss on contribution. Current text through October 5, 2026, read October 6.Relevant sections: Paragraphs (a) and (b): partnership contributions, sales, services, and investment-company exception; not all contributions qualify. Accessed October 6, 2026.
  2. Internal Revenue Service. Publication 541: Partnerships. December 2025 edition; read October 6, 2026.Relevant sections: Contributions, investment companies, outside basis, built-in gain, liabilities, dispositions, and inherited interests versus partnership asset basis. Accessed October 6, 2026.
  3. Prologis / Securities and Exchange Commission. October2025 prospectus: Partnership Unit Exchanges and Redemptions. Prospectus dated October 1, 2025 and filed October 3, 2025; historical example only.Relevant sections: Pages S-2, S-5, S-6 and related sections: shares versus units, redemption conditions, and taxable exchanges; historical illustration only. Accessed October 6, 2026.
  4. Postal Realty Trust. FAQs: Operating Partnership Units. Current company FAQ read October 6, 2026.Relevant sections: Company-specific distribution parity and redemption discretion; estate and state-tax summaries are not generalized. Accessed October 6, 2026.
  5. Internal Revenue Service. Partner Instructions for Schedule K1 (Form1065). 2025 instructions read October 6, 2026.Relevant sections: General instructions: taxable income whether distributed; outside basis, distributions, liability relief, and partner responsibilities. Accessed October 6, 2026.
  6. Electronic Code of Federal Regulations / Department of the Treasury. 26 CFR 1.1031(a)-3: Definition of real property. Current text retrieved October 6, 2026.Relevant sections: Paragraphs (a)(1)–(7): land, improvements, distinct assets, permanence, intangible interests, exclusions, and state law; classification versus depreciation. Accessed October 6, 2026.
  7. Securities and Exchange Commission / Investor.gov. Private Placements under Regulation D: Updated Investor Bulletin. Updated September 21, 2026; read October 6, 2026.Relevant sections: Risk of loss, illiquidity, limited disclosure, private placement memoranda, Form D limits, conflicts, and resale restrictions. Accessed October 6, 2026.

Educational information, not an offer or a personal tax, legal, or investment recommendation. Examples are hypothetical and omit stated adjustments. Tax treatment depends on your facts and current law. Review your transaction with your CPA, attorney, and qualified intermediary. Real estate investments can lose value and may be illiquid.

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