How to Report K-1 Income on Form 1040: Schedule E, SE Tax, and QBI

Income from a partnership, S corporation, estate, or trust reaches your Form 1040 through a Schedule K-1, and every box on that K-1 has a specific destination on your return. To report K-1 income on your 1040, you first identify which K-1 you received, then route each line item to the right schedule: Schedule E for business, rental, and royalty income; Schedule B for interest and dividends; Schedule D and Form 8949 for capital gains; and Schedule SE for self-employment tax. Those schedules then feed Schedule 1 (additional income and adjustments), Schedule 2 (additional taxes), or Schedule 3 (credits) of your 1040. The entity itself pays no federal income tax on the amounts passed through — you owe tax on your share whether or not you received any cash.1Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065)

First, Confirm Which K-1 You Have

Three different Schedule K-1s exist, and their box numbers do not line up. Interest income sits in Box 5 on a partnership K-1 but Box 4 on an S corporation K-1. Short-term capital gains are Box 8 on the partnership version and Box 7 on the S corporation version. Working from the wrong crosswalk is a common way to mis-report.

If Your K-1 Is Late

Partnerships and S corporations file by March 15; estates and trusts by April 15. Many entities extend, and a K-1 that arrives in September or later is normal.

If April 15 arrives with no K-1 in hand, file Form 4868 to extend your personal return to October 15. The extension does not extend the deadline to pay, so estimate your liability using prior-year K-1s or interim statements from the entity, and send that amount by April to avoid interest and penalties.

When the K-1 arrives, report items consistently with how the entity reported them. If you believe the entity made an error, or you never receive a K-1 at all, file Form 8082 to notify the IRS that your reporting differs from the entity’s filing.5Internal Revenue Service. Instructions for Form 8082 – Notice of Inconsistent Treatment or Administrative Adjustment Request (AAR) Silently adjusting the numbers is not an option.

Ordinary Business Income or Loss: Schedule E

Box 1 on the partnership and S corporation K-1s carries your share of ordinary business income or loss.2Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) Enter it on Schedule E, Part II, line 28, in the correct column for the entity type. The Part II total flows to Schedule 1 of your Form 1040.

Income is straightforward. A loss is not. Before a Box 1 loss reaches Schedule E as a deduction, it has to survive four limitations applied in order.

Basis

You cannot deduct more than your adjusted basis in the entity. For a partnership interest, basis includes your investment plus your share of partnership debts. For S corporation stock, basis includes your investment and money you personally loaned to the company — the corporation’s own bank debt does not count.6Internal Revenue Service. S Corporation Stock and Debt Basis Losses above basis are suspended and carry forward until basis increases.

At-Risk

Your deductible loss is further limited to what you could actually lose economically: cash and property contributed, plus debt you are personally liable for. Nonrecourse financing generally does not count. Blocked losses carry forward.

Passive Activity

If you did not materially participate in the activity, the loss is passive and can only offset other passive income. Excess passive losses are suspended until you generate passive income or dispose of your entire interest. Calculations go on Form 8582.7Internal Revenue Service. Instructions for Form 8582 – Passive Activity Loss Limitations IRS Publication 925 lists the seven material participation tests; the most familiar is working more than 500 hours in the activity during the year.8Internal Revenue Service. Publication 925 – Passive Activity and At-Risk Rules

Rental real estate has a carve-out. If you actively participate, you can deduct up to $25,000 of rental losses against nonpassive income. The $25,000 phases out at $1 for every $2 of AGI above $100,000 and disappears entirely at $150,000. Married filing separately gets $12,500 with a $50,000 floor.9Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited

Excess Business Loss

For 2025, aggregate business losses above $313,000 ($626,000 joint) are reclassified as a net operating loss carryforward rather than a current-year deduction. You compute this on Form 461.10Internal Revenue Service. Instructions for Form 461 – Limitation on Business Losses The thresholds adjust annually.

Interest, Dividends, Capital Gains, Royalties

Portfolio income skips the loss-limitation gauntlet and goes straight to the schedule that would normally report that type of income.

Interest (partnership Box 5; S corp Box 4) and ordinary dividends (partnership Box 6a; S corp Box 5a) go on Schedule B. You must file Schedule B if either interest or ordinary dividends exceed $1,500 for the year.11Internal Revenue Service. Instructions for Schedule B (Form 1040) Qualified dividends are reported separately on the K-1 and taxed at capital gains rates.

Short-term and long-term capital gains and losses flow to Form 8949 and Schedule D.12Internal Revenue Service. Instructions for Form 8949 The K-1 may break out collectibles gains (28% rate) and unrecaptured Section 1250 gain from depreciated real estate (up to 25%), each with its own line on Schedule D.13Internal Revenue Service. Instructions for Schedule D (Form 1040) – Capital Gains and Losses

Net rental real estate income or loss (Box 2 on both partnership and S corp K-1s) and royalty income (Box 7 on the partnership K-1) go on Schedule E. Rental losses run through the passive activity rules.

Investment Interest Expense Goes to Schedule A, Not E

Investment interest expense on a partnership K-1 (Box 13, Code H) is an itemized deduction, not a Schedule E item. It belongs on Schedule A after you compute the limit on Form 4952. The deduction is capped at your net investment income; any excess carries forward.

Self-Employment Tax

Whether a K-1 amount triggers self-employment tax depends entirely on the entity type.

Partnership and LLC K-1s

General partners and LLC members who participate in operations owe SE tax on their share of ordinary business income, reported in Box 14, Code A on the partnership K-1. Compute it on Schedule SE; the result flows to Schedule 2 of your 1040.14Internal Revenue Service. Schedule SE (Form 1040) – Self-Employment Tax Half of the SE tax then comes back as a deduction on Schedule 1, line 15, reducing your AGI.

Limited partners are generally exempt from SE tax on their distributive share under IRC 1402(a)(13), though guaranteed payments for services remain subject to SE tax regardless of partner status.15Internal Revenue Service. Self-Employment Tax for Partners – IRS Practice Unit The line between “limited partner” and member-manager in an LLC is unsettled; if you’re an LLC member who actively participates, assume SE tax applies.

S Corporation K-1s

S corporation shareholders do not pay SE tax on K-1 income. Shareholder-employees receive a W-2 salary that carries the payroll taxes instead.

If you own more than 2% of an S corporation and the company pays your health insurance, those premiums must be included in Box 1 of your W-2 but are not subject to Social Security or Medicare tax.16Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues Once they show up on the W-2, you can claim the self-employed health insurance deduction on Schedule 1, provided the coverage was established through the S corporation.

Qualified Business Income Deduction

Ordinary income from a trade or business on your K-1 (not rental or investment income) may qualify for the Section 199A deduction of up to 20% of qualified business income. The deduction is taken on your personal return; the entity does not claim it.17Internal Revenue Service. Instructions for Form 8995 – Qualified Business Income Deduction Simplified Computation

Your K-1 typically includes a statement of “QBI/Qualified PTP Items Subject to Taxpayer-Specific Determinations.” Do not simply carry that number forward as your QBI. Amounts suspended under the passive activity rules or disallowed under the basis rules are not QBI until the year they become deductible.17Internal Revenue Service. Instructions for Form 8995 – Qualified Business Income Deduction Simplified Computation

If your taxable income before the QBI deduction is under $197,300 single or $394,600 joint for 2025, use Form 8995. Above those thresholds, use Form 8995-A, which layers on limits based on W-2 wages paid by the business and the unadjusted basis of qualified property. Specified service trades — including law, accounting, and consulting — face additional restrictions in the phase-out range. The result reduces your taxable income through Schedule 1.

Net Investment Income Tax

A 3.8% surtax under IRC 1411 applies when modified AGI exceeds $200,000 single, $250,000 joint, or $125,000 married filing separately. These thresholds are not indexed and have not moved since 2013.18Internal Revenue Service. Questions and Answers on the Net Investment Income Tax

K-1 items in the NIIT base include interest, dividends, capital gains, rental income, royalties, and income from any business you did not materially participate in. Gains from selling a partnership or S corporation interest count to the extent you were a passive owner.18Internal Revenue Service. Questions and Answers on the Net Investment Income Tax Ordinary business income you materially participated in is generally excluded. The calculation goes on Form 8960, and the tax lands on Schedule 2.

Foreign Items and Schedule K-3

If the entity has foreign-source income, foreign tax paid, or international transactions, expect a Schedule K-3 along with the K-1. The K-3 carries the detail you need for Form 1116 (Foreign Tax Credit) and related international forms.19Internal Revenue Service. Instructions for Schedule K-3 (Form 1065)

Foreign taxes paid can be taken as a credit on Form 1116 or as an itemized deduction on Schedule A; the credit is usually the better result.20Internal Revenue Service. Instructions for Form 1116 A simplified election lets you skip Form 1116 if all your foreign income is passive and total foreign tax is $300 or less ($600 joint).

K-1 items that affect the alternative minimum tax — depreciation differences, passive activity adjustments, incentive stock option items — go on Form 6251.21Internal Revenue Service. Form 6251 – Alternative Minimum Tax – Individuals

How Everything Lands on Your 1040

After the supporting forms are done, the totals consolidate through three schedules attached to your 1040.

Schedule 1 collects the additional income and above-the-line adjustments: Schedule E business, rental, and royalty income; the half-of-SE-tax deduction; the self-employed health insurance deduction; and the QBI deduction (technically a below-the-line item that still ties in through the 1040 flow). Capital gains from Schedule D drop directly onto Form 1040.

Schedule 2 collects additional taxes: self-employment tax from Schedule SE and net investment income tax from Form 8960.14Internal Revenue Service. Schedule SE (Form 1040) – Self-Employment Tax

Schedule 3 collects credits, including the foreign tax credit from Form 1116.

Track any losses that got suspended at any stage — basis, at-risk, passive activity, or excess business loss. They carry forward and become deductible in a later year when the limitation eases. Losing track of suspended losses is one of the most expensive K-1 mistakes, especially when you change preparers or software. Keep your K-1s and the related worksheets for as long as you hold the investment, plus three years after the return on which the final loss is claimed.