Partnership profits are taxed directly to the partners, not to the partnership. A partnership is a pass-through entity: it files an informational return but owes no federal income tax itself.1Internal Revenue Service. Partnerships Each partner’s share of income, deductions, and credits flows to their personal return and is taxed at their individual rate. The partnership agreement controls who gets what share, but the IRS imposes rules that prevent tax-motivated arrangements from overriding the real economics.
What Gets Divided Before It’s Taxed
Before allocation happens, the partnership calculates taxable income under federal tax rules, which can differ from the accounting profit on its books. That income splits into two buckets.
Ordinary business income is revenue from the core operations (sales, services, fees) minus standard deductions like rent, wages, supplies, and depreciation. This is the basic profit-or-loss number each partner takes a share of.
Separately stated items are pulled out and reported on their own because they get special treatment at the individual level. The tax code requires partners to separately account for short-term and long-term capital gains and losses, charitable contributions, qualified dividends, foreign taxes paid, and other items that may face different rates or limitations depending on the partner’s personal situation.2Office of the Law Revision Counsel. 26 U.S. Code 702 – Income and Credits of Partner A long-term capital gain stays a long-term capital gain when it hits your return and qualifies for preferential rates.
Tax-exempt income also passes through and keeps its character. Municipal bond interest earned by the partnership isn’t taxed, but it still increases your basis, which matters for future distributions and loss deductions.3Office of the Law Revision Counsel. 26 U.S. Code 705 – Determination of Basis of Partner’s Interest
Guaranteed Payments
Some partners receive fixed payments for services or the use of capital, set without reference to profits. These guaranteed payments are treated for tax purposes as if paid to an outside service provider.4Office of the Law Revision Counsel. 26 U.S. Code 707 – Transactions Between Partner and Partnership The partnership deducts them as a business expense, reducing the ordinary income left over for everyone. The receiving partner reports the guaranteed payment as ordinary income on their personal return, on top of any share of remaining profits.
How the Agreement Divides Profits Among Partners
The partnership agreement dictates how each dollar of income, gain, loss, and deduction gets split. If the agreement is silent on an item, the IRS defaults to allocating based on each partner’s overall interest in the partnership, taking all the facts into account.5Office of the Law Revision Counsel. 26 U.S. Code 704 – Partner’s Distributive Share Most agreements spell the method out to avoid that default.
The simplest approach uses fixed ratios. Two partners might split everything 50/50, or a three-partner firm might use 60/20/20. Another common method ties each partner’s share to their capital account balance, so the partner who invested more gets a proportionally larger cut.
Special Allocations
Partnerships aren’t locked into one ratio for every item. They can assign specific types of income or deductions in different proportions than the general profit split. A partnership might route all depreciation deductions to the partner in the highest bracket while splitting cash-generating income evenly. These arrangements are called special allocations.
The IRS won’t respect a special allocation unless it passes the “substantial economic effect” test, a two-part requirement in the Treasury Regulations.6eCFR. 26 CFR 1.704-1 – Partner’s Distributive Share The “economic effect” prong requires that the allocation actually change how much money each partner would receive if the partnership liquidated. If you’re allocated a loss, your capital account drops, and you’d get less on liquidation. The “substantiality” prong ensures the allocation isn’t a wash where one partner’s tax benefit is offset by another’s in a way that leaves everyone’s after-tax position unchanged. Paper allocations that shuffle tax benefits with no real economic bite will be disregarded, and the IRS will reallocate based on the partners’ actual arrangement.
Property Contributed With Built-In Gain or Loss
When a partner contributes property worth more (or less) than its tax basis, the built-in gain or loss belongs to the contributing partner, not the group. The tax code requires that any built-in gain or loss existing at contribution be allocated back to the contributor.7eCFR. 26 CFR 1.704-3 – Contributed Property
Say a partner contributes a building with a $200,000 basis and a $500,000 fair market value. If the partnership later sells the building, the first $300,000 of taxable gain goes to the contributing partner. Only gain above that amount gets divided by the normal profit-sharing ratios. The same rule works in reverse for built-in losses.
Allocation Is Not the Same as Distribution
This distinction trips up more partners than almost anything else in partnership tax. An allocation is the assignment of taxable income or loss to a partner’s account. A distribution is the actual transfer of cash or property. These are separate events, and they don’t have to match.
A partner pays tax on their full allocated share for the year whether or not any cash arrives. A partnership might allocate you $150,000 of income and distribute only $20,000. You owe tax on the full $150,000. The remaining $130,000 of undistributed profit increases your outside basis, so you won’t be taxed again when the cash eventually comes out.
Distributions themselves are generally not taxable. They reduce your basis without triggering tax, as long as the cash you receive doesn’t exceed your adjusted basis in the partnership.8Office of the Law Revision Counsel. 26 U.S. Code 731 – Extent of Recognition of Gain or Loss on Distribution Excess over basis is taxed as capital gain.
Because partners can owe tax on income they haven’t received in cash, many agreements include a “tax distribution” provision. The partnership distributes enough cash to each partner to cover the estimated tax bill on allocated income, often using an assumed top marginal rate. Without it, partners can end up paying tax on phantom income out of their own pockets.
Debt Affects Basis Too
Your share of partnership debt increases your outside basis, which in turn affects how much loss you can deduct and how much you can receive in tax-free distributions. When the partnership takes on a loan, each partner’s share of that new liability is treated as if they contributed cash.9Office of the Law Revision Counsel. 26 U.S. Code 752 – Treatment of Certain Liabilities When the partnership pays debt down, the decrease is treated as a cash distribution.10Internal Revenue Service. Partner’s Outside Basis
A partner can have a negative capital account but still a positive outside basis because liability share props it up. And a large debt payoff or refinancing can inadvertently trigger taxable gain if it drives basis below zero. Partners in debt-heavy ventures, especially real estate, need to track liability shifts carefully.
Limits on Deducting Partnership Losses
Being allocated a loss doesn’t mean you can deduct it. Four separate limitations apply in sequence, and a loss must clear each before it reduces your taxable income.
- Basis limitation. You cannot deduct losses that exceed your outside basis. Losses above the ceiling are suspended and carry forward until you restore basis through contributions or income allocations.3Office of the Law Revision Counsel. 26 U.S. Code 705 – Determination of Basis of Partner’s Interest
- At-risk limitation. Even with enough basis, you can only deduct losses up to the amount you’re personally at risk: cash and property you contributed plus debt for which you’re personally liable. Nonrecourse borrowing with no personal exposure doesn’t count.11Office of the Law Revision Counsel. 26 U.S. Code 465 – Deductions Limited to Amount at Risk
- Passive activity limitation. Losses from an activity in which you don’t materially participate are passive and can only offset passive income from other sources. Otherwise they’re suspended until you have passive income or dispose of your entire interest.12Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited
- Excess business loss limitation. Any remaining net business loss above an annual inflation-adjusted threshold is capped and carried forward as a net operating loss. For 2025, the threshold is $313,000 for most filers and $626,000 for joint filers, with similar inflation-adjusted amounts expected for 2026.
The rules stack. A limited partner in a real estate fund might have enough basis and at-risk amount but still find losses trapped by the passive activity rules because they don’t manage the properties. Suspended losses aren’t lost permanently; they carry forward and become deductible when the underlying limitation clears.
How Partners Report Their Share
The partnership files Form 1065, an informational return covering total income, deductions, and other financial activity. No tax is paid with it. The real action is the Schedule K-1 issued to each partner, which breaks down that partner’s allocated share of ordinary income, separately stated items, guaranteed payments, and distributions.13Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income
Each partner takes the K-1 numbers to their Form 1040. Ordinary business income goes on Schedule E. Capital gains feed Schedule D. Charitable contributions go on Schedule A if the partner itemizes. Because items retain their character from the partnership level, the partner applies whatever rates, limitations, and deductions would normally apply to that type of income individually. This pass-through structure avoids the double taxation that hits C-corporations.
Tracking Your Outside Basis
Every partner needs a running basis calculation. Outside basis starts with what you contributed (cash plus the adjusted basis of any property). It goes up each year by your share of partnership income (including tax-exempt income) and additional contributions, and down by distributions, your share of losses, and nondeductible expenses.3Office of the Law Revision Counsel. 26 U.S. Code 705 – Determination of Basis of Partner’s Interest Shifts in your share of liabilities also adjust it.9Office of the Law Revision Counsel. 26 U.S. Code 752 – Treatment of Certain Liabilities
This number matters for three things: how much loss you can deduct, whether a distribution triggers taxable gain, and how much gain or loss you recognize when you sell your partnership interest. Losing track of basis is one of the most common and expensive mistakes partners make, especially over a long holding period with layers of income, losses, contributions, and distributions.
Self-Employment Tax for Partners
Beyond income tax, many partners owe self-employment tax, which funds Social Security and Medicare. The base rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare.14Internal Revenue Service. Self-Employment Tax The Social Security portion applies only on net self-employment earnings up to $184,500 in 2026.15Social Security Administration. Contribution and Benefit Base Medicare has no cap. An additional 0.9% Medicare surtax kicks in once self-employment earnings exceed $200,000 for single filers or $250,000 for joint filers.16Internal Revenue Service. Topic No. 560, Additional Medicare Tax
General partners owe self-employment tax on their entire distributive share of ordinary business income, plus any guaranteed payments. General partners run the business, so their income is treated as earnings from a trade or business rather than a passive return on investment.
The tax code excludes a limited partner’s distributive share from self-employment tax, though guaranteed payments for services remain subject to it.17Office of the Law Revision Counsel. 26 U.S. Code 1402 – Definitions The idea is that limited partners are passive investors who shouldn’t pay the equivalent of payroll tax on investment returns.
That bright-line rule has been under pressure. In recent cases the Tax Court has applied a “functional analysis” to determine whether someone labeled a limited partner is really acting like one. If a “limited” partner manages daily operations, makes business decisions, and is held out to clients as a key player, the court can reclassify their income as subject to self-employment tax regardless of the title. The Tax Court applied that reasoning in the Soroban Capital Partners line of cases, finding that partners who were limited in name only owed self-employment tax on their full distributive shares.
The Qualified Business Income Deduction
Partners may be eligible for a deduction of up to 20% of their qualified business income from the partnership, claimed on the personal return rather than at the partnership level.18Office of the Law Revision Counsel. 26 U.S. Code 199A – Qualified Business Income The deduction, created by the Tax Cuts and Jobs Act, was originally scheduled to expire after December 31, 2025. If Congress has not extended it, the deduction is unavailable for 2026 tax years. Check current IRS guidance or consult a tax professional to confirm whether it remains in effect.
When available, each partner calculates 20% of their allocated share of qualified business income. The actual deduction is the lesser of that amount or 20% of the partner’s total taxable income minus net capital gains. Above certain income thresholds, the deduction phases down based on the W-2 wages the partnership pays and the cost basis of its depreciable property. Guaranteed payments and investment income are not qualified business income and don’t feed the deduction.
Partners in specified service businesses (law firms, medical practices, consulting firms, and similar fields) face additional restrictions. Above the income thresholds the deduction phases out entirely for these fields. Below the thresholds, service-business partners receive the full benefit.
Filing Deadlines and Penalties
Partnership returns are due on the 15th day of the third month after the end of the partnership’s tax year. For calendar-year partnerships, that’s March 15. The partnership can request an automatic six-month extension using Form 7004, pushing the deadline to September 15.19Internal Revenue Service. Publication 509, Tax Calendars Schedule K-1s must reach partners by the same March 15 date whether or not the partnership extends its own filing.
The late-filing penalty is steep and scales with the number of partners. Under the most recent IRS guidance, the partnership owes $255 per partner for each month or partial month the return is late, up to a maximum of 12 months.20Internal Revenue Service. Instructions for Form 1065 The base statutory amount is inflation-adjusted annually.21Office of the Law Revision Counsel. 26 U.S. Code 6698 – Failure to File Partnership Return The penalty can be waived for reasonable cause, but the IRS is not generous with waivers, and “I forgot” doesn’t qualify.
Partners waiting on a late K-1 face an awkward choice: file the personal return with estimated numbers and amend later, or request their own extension. Either way, a partnership’s late filing cascades into headaches for every partner on the return.