Share of the Partnership: Basis, Losses, and K-1 Income

A partner’s share of partnership taxes is the portion of the business’s income, loss, deductions, and credits that flows through to you personally each year and lands on your individual return, whether or not the partnership actually put cash in your hands. The partnership itself pays no federal income tax. Instead, the numbers on your Schedule K-1 become part of your taxable income, and how much you can actually deduct, and how much of any distribution or sale is taxable, depends on your basis, your role in the business, and the terms of the partnership agreement.

What Your Share Actually Consists Of

A partnership interest is not a single percentage. It splits into three components that the partnership agreement can divide independently, and each one drives different tax consequences.

Your capital interest is your claim on the partnership’s net assets if it liquidated tomorrow. It tracks your capital account: what you contributed, adjusted for income allocated to you, losses absorbed, and distributions taken.

Your profits interest is your right to a share of ongoing income and loss. This is the percentage that drives what shows up on your tax return every year. You can hold a profits interest without any capital interest, which is common when a partner contributes services rather than cash.

Your management interest is your voice in business decisions. In a general partnership all partners typically share this authority; in a limited partnership or LLC it is often concentrated in general partners or managing members. Whether you actively manage the business matters for taxes because it affects self-employment tax, passive loss rules, and the net investment income tax.

Partners cannot split allocations however they like just because the agreement says so. Each allocation must have “substantial economic effect,” meaning it has to actually change the dollars each partner receives, not just shuffle tax benefits around. If an allocation fails that test the IRS will reallocate based on the partners’ real economic arrangement.¹

Outside Basis: The Number That Controls Everything

Your outside basis is your tax cost in the partnership interest. It governs two things you care about: how much partnership loss you can deduct, and whether cash distributions are tax-free or taxable. Partners who lose track of basis get unpleasant surprises at tax time.

Where Basis Starts

Contribute cash and your starting basis equals that cash. Contribute property and your basis equals your adjusted tax basis in the property, not its fair market value.² If you contribute equipment worth $200,000 with a tax basis of $60,000, you start with $60,000 of outside basis. You also add your share of partnership debt at the time you join.

What Moves Basis Up and Down

Basis goes up when you contribute more cash or property and by your share of every category of partnership income, including tax-exempt income.³ That is what later lets you receive cash without triggering tax.

Basis drops when you take cash distributions, when losses are allocated to you, and by your share of nondeductible expenses like fines. It cannot go below zero. Losses in excess of basis suspend and carry forward until basis recovers.⁴

The Debt Piece That Catches People

When the partnership takes on new debt, your share of that liability is treated as if you had contributed cash, increasing your basis. When partnership debt is paid down or you leave and shed your share, the reduction is treated as a cash distribution, lowering your basis.⁵ If your basis is already low and the partnership pays off a large loan, that deemed distribution can push you into taxable gain even though you never touched the money.

Three Hurdles Before You Can Deduct a Loss

Your share of partnership losses is not automatically deductible. It has to clear three separate limitations, applied in order. A loss blocked at any stage suspends and carries forward.

Basis

You cannot deduct more loss than your outside basis at year end.⁴ Excess losses wait until basis increases through contributions, income, or new partnership debt.

At-Risk

Losses that survive basis face a second test. You can deduct only up to the amount you are personally at risk in the activity: cash and property contributed, plus borrowed amounts you are personally liable for or have pledged personal collateral against.⁶ Nonrecourse debt generally does not count, with an exception for qualified nonrecourse financing secured by real property. That exception matters for real estate partnerships, where a partner’s share of a nonrecourse mortgage on partnership real estate does count as at-risk.

Passive Activity

If you do not materially participate, your losses can only offset passive income from other sources. They cannot shelter wages, portfolio income, or active business income. Blocked passive losses carry forward until you generate passive income or dispose of your entire interest in a taxable transaction, at which point suspended losses are released. Rental activities are treated as passive regardless of your involvement, with a narrow exception for real estate professionals who spend more than 750 hours per year and more than half their working time in real property businesses.⁷

How Your Share of Income Gets Taxed Each Year

The partnership files an information return, but it does not pay tax. Every item flows to you and is taxed on your personal return in the year it is allocated, even if the partnership kept the cash. That mismatch between taxable income and cash received is one of the harder realities of being a partner.

Reading the K-1

Each year the partnership issues you a Schedule K-1 breaking out your share of ordinary business income, rental income, interest, dividends, capital gains, and other categories.⁸ Calendar-year partnerships must deliver K-1s by March 15.⁹ Late K-1s are one of the most common reasons partners have to extend their personal returns.

Allocations Are Not Distributions

An allocation is your share of taxable income or loss. A distribution is actual cash or property the partnership gives you. These are separate events. You pay tax on allocations when they occur regardless of what you receive. The partnership might allocate $80,000 of income to you and distribute only $30,000. You owe tax on the full $80,000.

When Cash Distributions Are Taxable

Cash distributions are tax-free up to your outside basis. Anything above that is taxed as capital gain.¹⁰ The logic: you already paid tax on the income when allocated, so cash coming back is a return of investment until you exhaust it. A partner with a $50,000 basis who receives $50,000 recognizes no gain. A $55,000 distribution produces $5,000 of capital gain.¹¹

The Other Tax Layers on Partnership Income

Ordinary income tax is only the first layer. Depending on your role and income, three more can apply.

Self-Employment Tax

General partners and managing LLC members owe self-employment tax on their share of ordinary business income.¹² Limited partners get a break: their distributive share of ordinary business income is excluded, though guaranteed payments for services remain subject to it.¹³ The line between general and limited treatment has been disputed for decades, especially for LLC members. The IRS position is that members performing services are treated like general partners, but the area remains unsettled for many LLC structures.

Guaranteed Payments

A guaranteed payment is a fixed amount paid to a partner for services or use of capital, set without regard to whether the partnership made money. The partnership deducts it; the receiving partner reports it as ordinary income.¹⁴ Guaranteed payments for services carry self-employment tax. They appear as a separate line item on the K-1 and are taxable to the recipient even in years the partnership operates at a loss.

Net Investment Income Tax

Partners with modified adjusted gross income above $200,000 (single) or $250,000 (married filing jointly) face a 3.8% surtax on net investment income.¹⁵ For partnership items, the NIIT generally hits passive partnership income and gains from selling a partnership interest. If you materially participate, ordinary income from that trade or business is not net investment income and escapes the surtax. The thresholds are not indexed for inflation, so they catch more taxpayers each year.¹⁶

Tax When You Sell, Redeem, or Give Away Your Interest

Exit tax depends on how you exit. A sale to a third party, a redemption by the partnership, and a gift all follow different rules, and in every case your adjusted basis at the moment of transfer drives the number.

Selling to Another Buyer

A sale is treated as the sale of a capital asset. Gain or loss equals amount realized minus adjusted outside basis.¹⁷ The trap: amount realized includes not just the price you negotiate but also your share of partnership liabilities that the buyer assumes.⁵ Sell a 30% interest for $200,000 when your share of partnership debt is $80,000, and your amount realized is $280,000.

Hot Assets Convert Some Gain to Ordinary Income

Not all of your gain gets capital gain rates. If the partnership holds hot assets — unrealized receivables and inventory items — a portion of your gain is recharacterized as ordinary income.¹⁸ The logic is that had the partnership sold those assets directly, the income would have been ordinary; letting a partner get capital gain treatment by selling the interest instead would be a loophole. You calculate how much ordinary income the partnership would recognize if it sold each hot asset at fair market value, take your share, and treat that piece as ordinary. The rest keeps its capital character. This split is a common audit issue and is worth running past a tax professional.

Section 754 Election for the Buyer’s Benefit

When a buyer pays more than their proportionate share of the partnership’s inside basis, there is a gap. Without action, the buyer gets no benefit from having paid the premium because partnership asset basis stays the same. A Section 754 election lets the partnership make a Section 743(b) adjustment that increases the buyer’s share of asset basis to match what the buyer actually paid.¹⁹²⁰ In a real estate partnership, that can unlock significant added depreciation for the incoming partner. Once made, the election applies to all future transfers and distributions unless revoked with IRS permission.

Redemption by the Partnership

When the partnership itself buys out a departing partner, the rules shift. Cash payments up to basis are tax-free; excess is capital gain.¹⁰ Property distributed in liquidation is generally not taxable at the time; the partner takes carryover basis. Some liquidating payments, though, are treated as distributive share or guaranteed payments rather than payment for the interest. Payments for unrealized receivables, and in certain partnerships where capital is not a material income-producing factor, payments for goodwill, fall into this category and are taxed as ordinary income.²¹

Gifting an Interest

A gift of a partnership interest is not an income tax event for the recipient, though the donor may owe gift tax if value exceeds the annual exclusion. The real trap is liabilities. When you gift an interest that carries partnership debt, the recipient assumes that debt and you are relieved of it. If the debt relief exceeds your basis, you are treated as having sold the interest for the amount of the debt and recognize taxable gain on the difference.²² Partners with negative capital accounts are particularly exposed.

When a Partner Dies

Death does not automatically end the partnership, but the deceased partner’s interest has to be resolved, and two tax rules dominate.

The Step-Up in Basis

Heirs take the partnership interest with outside basis stepped up to fair market value at date of death, wiping out built-in gain.²³ The step-up only affects outside basis, though. Unless a Section 754 election is in effect, the partnership’s inside asset basis stays the same, and the heir gets no boost in depreciation or reduced gain when the partnership later sells assets. Making the 754 election allows a Section 743(b) adjustment that aligns the successor’s share of inside basis with the stepped-up outside basis.²⁰

Income in Respect of a Decedent

The deceased partner’s share of partnership income earned through the date of death is taxed to the estate or successor as income in respect of a decedent. It does not get the step-up and is taxed when received, just as it would have been taxed to the deceased partner.²⁴ Certain liquidating payments to the estate can also be treated as IRD. The estate may get a deduction for federal estate tax attributable to that income, which partially offsets the double-tax effect, but the mechanics are complex enough that professional guidance is close to essential.

1
Office of the Law Revision Counsel. 26 USC 704 – Partners Distributive Share
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Office of the Law Revision Counsel. 26 US Code 722 – Basis of Contributing Partners Interest
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Office of the Law Revision Counsel. 26 US Code 705 – Determination of Basis of Partners Interest
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Office of the Law Revision Counsel. 26 US Code 704 – Partners Distributive Share
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Office of the Law Revision Counsel. 26 US Code 752 – Treatment of Certain Liabilities
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Office of the Law Revision Counsel. 26 USC 465 – Deductions Limited to Amount at Risk
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Office of the Law Revision Counsel. 26 US Code 469 – Passive Activity Losses and Credits Limited
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Internal Revenue Service. Partners Instructions for Schedule K-1 (Form 1065)
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Internal Revenue Service. Publication 509 (2026), Tax Calendars
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Office of the Law Revision Counsel. 26 US Code 731 – Extent of Recognition of Gain or Loss on Distribution
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eCFR. 26 CFR 1.731-1 – Extent of Recognition of Gain or Loss on Distribution
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Internal Revenue Service. Entities
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Office of the Law Revision Counsel. 26 USC 1402 – Definitions
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Office of the Law Revision Counsel. 26 US Code 707 – Transactions Between Partner and Partnership
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Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax
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Internal Revenue Service. Topic No 559 Net Investment Income Tax
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Office of the Law Revision Counsel. 26 US Code 741 – Recognition and Character of Gain or Loss on Sale or Exchange
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Office of the Law Revision Counsel. 26 US Code 751 – Unrealized Receivables and Inventory Items
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Office of the Law Revision Counsel. 26 USC 754 – Manner of Electing Optional Adjustment to Basis of Partnership Property
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GovInfo. 26 USC 743 – Optional Adjustment to Basis of Partnership Property
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Office of the Law Revision Counsel. 26 USC 736 – Payments to a Retiring Partner or a Deceased Partners Successor in Interest
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eCFR. 26 CFR 1.1001-2 – Discharge of Liabilities
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Office of the Law Revision Counsel. 26 US Code 1014 – Basis of Property Acquired From a Decedent
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eCFR. 26 CFR 1.753-1 – Partner Receiving Income in Respect of Decedent