Partnership Tax Rules — Subchapter K and Flow-Through Taxation

Partnerships — including LLCs taxed as partnerships — don't pay federal income tax themselves. Instead, every item of income, gain, loss, deduction, and credit flows through to the individual partners who report it on their own tax returns. This is the defining feature of Subchapter K, codified at 26 U.S.C. §§ 701–761: the entity is a conduit, not a taxpayer. Nearly every multi-member LLC, law firm, hedge fund, real estate venture, and family farming operation uses this framework — making Subchapter K one of the most widely applicable (and most complex) corners of the Internal Revenue Code.

Current Law (2026)

Parameter	Value
Core statute	26 U.S.C. §§ 701–761 (Subchapter K)
Entity-level tax	None — partnership itself is not subject to income tax (§ 701)
Partner reporting	Each partner reports their distributive share of partnership income, gain, loss, deduction, and credit (§ 702)
Schedule K-1	Partnership files Form 1065; each partner receives a K-1 reporting their share
Contribution of property	Generally no gain or loss recognized on contribution to a partnership in exchange for an interest (§ 721)
Basis in partnership interest	Starts at amount contributed; increases with income/liabilities; decreases with distributions/losses (§§ 722, 705)
Distributions	Generally no gain except when cash distributed exceeds adjusted basis of partner's interest (§ 731)
Hot assets (§ 751)	Unrealized receivables and inventory items trigger ordinary income treatment on sale/exchange of partnership interest
§ 754 election	Optional inside basis adjustment on transfer or distribution; once elected, applies to all future transfers
Organizational expenses	Up to $5,000 deductible in year of formation; excess amortized over 15 years (§ 709)
Guaranteed payments	Fixed payments to partners regardless of income are treated as ordinary income to recipient (§ 707(c))

Legal Authority

26 U.S.C. § 701 — Partners, not partnership, subject to tax: establishes the fundamental pass-through principle; the partnership itself pays no income tax; each partner is taxed individually
26 U.S.C. § 702 — Income and credits of partner: each partner must separately report their distributive share of capital gains, ordinary income, charitable contributions, foreign tax credits, and other separately stated items
26 U.S.C. § 703 — Partnership computations: the partnership computes its taxable income like an individual, except that personal exemptions, charitable contribution deductions, and NOL deductions are not allowed at the entity level
26 U.S.C. § 704 — Partner's distributive share: allocations are determined by the partnership agreement, but must have "substantial economic effect" or reflect the partner's actual interest in the partnership — preventing purely tax-motivated allocation shifting
26 U.S.C. § 705 — Determination of basis of partner's interest: the outside basis tracks economic reality — increased by income allocations and liability assumptions, decreased by distributions and loss allocations
26 U.S.C. § 707 — Transactions between partner and partnership: when a partner deals with the partnership in a non-partner capacity, the transaction is treated as arm's-length; guaranteed payments are deductible by the partnership and ordinary income to the partner
26 U.S.C. § 721 — Nonrecognition of gain or loss on contribution: contributing property to a partnership in exchange for a partnership interest is not a taxable event — the partnership takes a carryover basis in the contributed property (§ 723) and the partner's basis in the interest equals the contributed property's basis (§ 722). The most prominent application of § 721 in practice is the 721 UPREIT exchange, where real estate owners contribute appreciated property to a REIT's operating partnership.
26 U.S.C. § 731 — Extent of recognition of gain or loss on distribution: a partner receiving a partnership distribution generally recognizes no gain unless cash distributed exceeds their outside basis; losses are only recognized in complete liquidations of a partner's interest
26 U.S.C. § 734 — Adjustment to basis of undistributed partnership property: if a § 754 election is in effect, a distribution that triggers gain to the distributee partner (or that reduces inside basis below fair market value) allows the partnership to step up (or step down) its remaining property's basis
26 U.S.C. § 743 — Special rules where § 754 election or substantial built-in loss: when a partnership interest is sold or a partner dies, a § 754 election allows the partnership to adjust the inside basis of its assets to reflect the purchase price paid by the incoming partner — preventing the new partner from being taxed on pre-acquisition gains
26 U.S.C. § 751 — Unrealized receivables and inventory items ("hot assets"): gain or loss from selling a partnership interest that is attributable to unrealized receivables or substantially appreciated inventory is recharacterized as ordinary income rather than capital gain — preventing capital gain treatment on items that would have been ordinary income in the partnership's hands
26 U.S.C. § 754 — Optional adjustment to basis of partnership property: the § 754 election, once made, applies permanently; it allows inside-outside basis alignment on both transfers (§ 743) and distributions (§ 734)
26 U.S.C. § 761 — Terms defined: "partnership" includes any syndicate, group, pool, joint venture, or unincorporated organization through which business is conducted; the Secretary may allow certain investment partnerships to elect out of Subchapter K entirely

How Partnership Taxation Works

The pass-through structure: When a partnership earns $1 million in rental income, none of that income is taxed at the entity level. Instead, each partner receives a Schedule K-1 reporting their share — say, $500,000 each for a two-partner deal — and each partner pays tax at their individual marginal rate. This avoids the "double tax" that C corporations face (tax on corporate profits, then tax again on dividends). The tradeoff: partnership returns (Form 1065 and K-1s) are notoriously complex.

Outside basis and inside basis: Every partner has an "outside basis" — their adjusted basis in the partnership interest itself. The partnership separately tracks "inside basis" — the adjusted basis of its individual assets. Ideally, these two numbers move in sync. Outside basis increases when a partner's share of income is allocated, and decreases when losses are allocated or distributions are received. If outside basis hits zero, further loss allocations are suspended until basis is restored.

The § 754 election: Without a § 754 election, a new partner who pays $500,000 for a 50% interest in a partnership with only $200,000 of inside basis in its assets faces a mismatch: if the partnership later sells all its assets for $1 million, the new partner pays tax on $400,000 of gain they already "paid for" at purchase. The § 754 election fixes this by giving the new partner a step-up in the inside basis of partnership assets proportional to the premium they paid. Once elected, the election is permanent and applies to all subsequent transfers — which is why the decision deserves careful analysis.

Hot assets — the § 751 trap: When a partner sells their partnership interest, the gain would normally be capital gain (favorable tax rate). But § 751 recharacterizes the portion of that gain attributable to "hot assets" — unrealized receivables (accounts receivable, depreciation recapture potential, etc.) and substantially appreciated inventory — as ordinary income. For partnerships with significant accounts receivable (like law firms or consulting practices), this can convert a substantial portion of what feels like a capital gain into ordinary income taxed at full rates.

Contributions of built-in gain property (§ 704(c)): When a partner contributes appreciated property, the built-in gain at the time of contribution must eventually be allocated back to the contributing partner when the partnership sells or distributes that property. This prevents partners from stuffing appreciated assets into a partnership and then sharing the gain with other partners who didn't bear the economic appreciation.

Guaranteed payments: When a senior partner receives a fixed $200,000 annual payment regardless of whether the partnership is profitable, that guaranteed payment (§ 707(c)) is deductible by the partnership as a business expense and ordinary income to the recipient partner — subject to self-employment tax. It's economically similar to a salary but with significant technical tax distinctions.

How It Affects You

If you're an LLC member in a multi-member LLC: Unless you've elected corporate taxation, your LLC is taxed as a partnership under Subchapter K by default. You'll receive a Schedule K-1 each year showing your allocated share of income, losses, deductions, and credits — and you pay tax on that allocated amount regardless of whether cash was actually distributed to you. If the partnership earned $500,000 and allocated $100,000 to you, you owe income tax on $100,000 even if you received zero cash because the partnership reinvested everything. The fix: ensure your operating agreement includes tax distribution provisions — mandatory distributions covering at least each member's estimated tax liability on their allocable share. Without this protection, profitable partnerships routinely create "phantom income" tax bills for cash-strapped partners.

If you're a real estate investor in a limited partnership: The § 752 debt-inclusion rules can dramatically expand your ability to deduct losses. When the partnership takes on nonrecourse debt to buy property, each limited partner includes their proportionate share of that debt in their outside basis — allowing them to absorb more allocable losses before the basis limitation kicks in. A $1 million LP investment with $4 million of nonrecourse debt allocated gives you up to $5 million of loss-absorption capacity. But the at-risk rules (§ 465) and passive activity rules (§ 469) then apply sequential limits before you can actually deduct those losses on your individual return. Get a basis, at-risk, and PAL tracking worksheet from your tax advisor every year — these interact in ways that can create large deferred loss carryforwards you may not realize you have.

If you're selling a partnership interest: Before you negotiate a sale price, get a current capital account statement and a breakdown of the partnership's § 751 "hot assets" — unrealized receivables, accounts receivable, and substantially appreciated inventory. The portion of your sale gain attributable to hot assets is ordinary income (not capital gain), regardless of how long you held the interest and regardless of how the purchase price is labeled. On a $500,000 gain from selling a professional services partnership interest, it's not unusual for $200,000+ to be recharacterized as ordinary income under § 751. If the partnership has a § 754 election in place, the buyer gets an inside basis step-up equal to their purchase price — making your interest worth more to them and potentially improving the price you can negotiate.

If you're forming a new partnership or advising on one: Make the § 754 election decision in the first year — once made, it's permanent. The election allows the partnership to adjust the inside basis of assets when a partnership interest is transferred (either by sale or death), preventing new partners from being taxed on gains that accrued before they joined. For investment partnerships with frequent ownership changes (fund structures, real estate syndications), the § 754 election is nearly always worth the administrative burden. For small family partnerships with few expected changes, it may not be. Also decide early whether you need a special allocations structure under § 704(b) "substantial economic effect" — allocations that don't follow ownership percentages require detailed economic effect provisions in the partnership agreement to withstand IRS challenge.

If you're in a family limited partnership (FLP) or family LLC: The IRS closely scrutinizes income-shifting strategies where income is allocated to lower-bracket family members. Under § 704(e), a family member's distributive share must reflect their actual capital contribution and services — allocations designed purely to reduce the family's aggregate tax bill will be recharacterized to reflect economic reality. FLPs used primarily for estate planning purposes also face valuation discount challenges (minority interest and lack of marketability discounts). Properly structured FLPs remain a legitimate planning tool, but they require real operating agreements, legitimate business purposes beyond tax savings, and consistent respect for the partnership's separate legal existence.

State Variations

Most states follow the federal pass-through framework for partnerships, but several significant variations apply:

State composite returns: Many states allow or require partnerships with nonresident partners to file composite returns and pay tax on behalf of those partners — reducing the filing burden for out-of-state investors
Entity-level taxes: Several states (including California, Texas, and New York) impose entity-level fees or franchise taxes on partnerships and LLCs that are separate from the partners' individual income taxes. California's flat LLC fee can reach $11,790 per year on high-revenue LLCs
SALT deduction workaround: After TCJA capped the state and local tax deduction at $10,000, many states (including California, New York, and New Jersey) enacted pass-through entity taxes (PTETs) — allowing partnerships to pay an entity-level state tax that is fully deductible at the federal level, effectively restoring SALT deductions for business owners
§ 754 elections: State treatment of § 754 inside basis adjustments varies; some states conform, others do not

Implementing Regulations

26 CFR 1.701-1 — Partners, not partnership, subject to tax (the foundational rule of pass-through taxation)
26 CFR 1.701-2 — Anti-abuse rule (Treasury anti-abuse rule allowing recharacterization of partnership transactions that have substantial tax avoidance purposes)

Pending Legislation

Tax reform discussions periodically target carried interest — the rule that allows investment fund managers who receive a profits interest in exchange for services to treat their share of long-term capital gains as capital gain rather than ordinary income. Under current law, this "carried interest" treatment is available because the interest is a partnership interest (§ 702 flow-through). Congress has debated limiting this in multiple sessions; the Inflation Reduction Act of 2022 extended the holding period for carried interest treatment to 3 years for most assets, but did not eliminate the treatment. Further reform proposals remain active as of 2026.

Recent Developments

The IRS has increased focus on partnership audits through the Centralized Partnership Audit Regime (CPAR), which took effect for tax years beginning after 2017. Under CPAR, the IRS audits the partnership entity directly rather than individual partners, and any underpayment is assessed and collected at the partnership level. Partnerships with 100 or fewer qualifying partners may elect out of CPAR, but most larger partnerships must operate under it — creating significant complexity around "push-out" elections to shift audit adjustments to partners. The IRS also continues enforcement efforts targeting syndicated conservation easements structured as partnerships to generate inflated deductions.

IRS large partnership audit initiative (2023-2025): Using IRA funding, IRS launched a focused examination initiative targeting large partnerships — those with assets above $10 million. The initiative used AI and data analytics to identify high-risk partnership returns for audit. IRS opened examinations of hundreds of large partnerships, focusing on income-shifting transactions, basis manipulation, disguised sales, and inflated charitable contribution deductions. DOGE-driven IRS staffing cuts threatened to reduce the partnership audit capacity built with IRA funds; however, IRS maintained most of the large partnership audit team as a high-revenue-generating function.
OBBBA partnership provisions: The One Big Beautiful Bill Act included several partnership tax changes. The OBBBA modified the treatment of "specified service trade or business" partnerships for QBI deduction purposes, allowing certain professional service LLPs a partial QBI benefit that was previously completely denied. The bill also clarified the "disguised sale" rules for property contributions to partnerships, adding bright-line tests for transactions structured as property contributions followed by debt-financed distributions. The OBBBA's carried interest provisions (discussed below) were the most politically contested partnership tax change.
Carried interest — OBBBA modification: The OBBBA modified (but did not eliminate) the carried interest preferential tax rate for private equity, hedge funds, and real estate fund managers. Trump had promised to eliminate the "carried interest loophole" during the 2024 campaign; the final OBBBA extended the holding period for long-term capital gain treatment from 3 years to 5 years (from the TCJA's 3-year rule, which was itself an increase from the prior 1-year rule). A longer holding period requirement reduces the number of fund investments that qualify for carried interest capital gain treatment without eliminating the preference entirely.
Conservation easement syndication enforcement: IRS designated syndicated conservation easements as "listed transactions" (per se abusive tax shelters) in 2017; the Supreme Court in Green Valley Investors v. Commissioner (2023) held that IRS violated the APA by not going through notice-and-comment rulemaking before imposing disclosure and penalty requirements. Congress subsequently codified the listed transaction designation in statute, eliminating the APA procedural defect. IRS continues to assess penalties on syndicated conservation easement partnerships; Tax Court has sustained penalties in numerous cases where appraisers inflated property values by 10-100x to generate outsized charitable deductions.