What is Schedule K-1?
Schedule K-1 is a tax form that passes income, losses, deductions, and credits from a pass-through business entity to each owner's personal tax return. Unlike a W-2 or 1099, a K-1 is not filed directly with the IRS by the recipient — it's a byproduct of the entity's own return, issued to each partner or shareholder separately.
The IRS publishes two versions:
- Schedule K-1 (Form 1065) — issued by partnerships and multi-member LLCs taxed as partnerships
- Schedule K-1 (Form 1120-S) — issued by S-corporations
Both serve the same purpose: they track what fraction of the entity's activity flows to each owner so the right person pays tax on the right amount.
Who gets a K-1?
Every partner in a partnership and every shareholder in an S-corp receives a K-1 showing their proportional share of the entity's income (or loss) for the year — regardless of how much cash they received.
If you own 35% of an S-corp that earned $200,000 in ordinary income, your K-1 shows $70,000 in pass-through income. Whether the company distributed $70,000 to you, kept it in the bank, or used it for operations doesn't change your personal tax obligation. You owe income tax on that $70,000 in the year it was earned.
For calendar-year entities, K-1s must reach recipients by March 15. If the entity files a 6-month extension (Form 7004), the K-1 deadline extends to September 15. If you're also trying to close a business loan that requires K-1s, a late-filing partnership can delay your closing by months.
What's on a Schedule K-1?
The line items differ slightly between the 1065 (partnership) and 1120-S (S-corp) versions, but the core categories are the same:
| K-1 item | What it represents |
|---|---|
| Ordinary income (loss) | Your share of the entity's net business income or loss |
| Interest income | Your allocable share of interest the entity earned |
| Net short-term capital gain (loss) | Your share of realized short-term gains |
| Net long-term capital gain (loss) | Your share of realized long-term gains |
| Section 179 deduction | Your share of asset-expensing elections made by the entity |
| Net rental income (loss) | Your share of rental activity if the entity holds real property |
| Charitable contributions | Passed through for potential itemized deduction on Schedule A |
| Guaranteed payments | Partnerships only — fixed payments to partners regardless of profit |
| Self-employment earnings | Partnerships only — determines SE tax owed on Schedule SE |
One structural difference: S-corp owners who work in the business receive a W-2 wage separate from the K-1. The K-1 carries profit distributions and pass-through income — not salary. IRS Publication 541 on Partnerships outlines the contrasting treatment for partnership income, which often carries self-employment tax that S-corp distributions do not.
How K-1 income flows to your personal return
K-1 items land in different parts of your Form 1040 depending on their character:
- Ordinary income/loss → Schedule E, Part II → Form 1040 Line 17
- Capital gains/losses → Schedule D → Form 1040
- Partnership SE earnings → Schedule SE → Form 1040 (self-employment tax)
- Section 199A income → Form 8995 (for the QBI deduction)
The QBI deduction is one of the larger downstream benefits flowing through K-1s for many business owners — pass-through income from qualifying partnerships and S-corps can qualify for up to a 20% deduction, subject to income and wage/property thresholds.
K-1 income and your business loan application
This is where K-1s have direct consequences for borrowing.
Business lenders — including SBA 7(a) underwriters — use K-1 income to document what a business owner actually earns from the entity. Here's how it typically works:
Two-year average. Lenders typically average K-1 ordinary income across the most recent two years. A single strong year doesn't inflate qualification; a single weak year doesn't eliminate it. Both years count.
Non-cash add-backs. Depreciation and amortization passed through on the K-1 are frequently added back to income by underwriters. A large Section 179 deduction reduces taxable income on paper while leaving cash flow intact — lenders often treat that as non-economic for income qualification.
Losses reduce qualifying income. A K-1 showing an ordinary loss is not ignored. Lenders subtract it. If the entity had a down year, that's visible in your qualifying income whether you distributed cash or not.
Extension timing matters. If the entity filed a 6-month extension, K-1s may not arrive until fall. Most lenders require actual K-1s before underwriting is complete. If your target loan closing is summer or fall, confirm the entity's filing timeline early.
If you're an S-corp owner weighing its funding implications, the K-1 income discipline above is load-bearing: how you split income between W-2 wages and distributions shapes your personal qualifying income for lenders. Reasonable compensation requirements for S-corp shareholder-employees directly affect what shows up on the K-1 vs. the W-2.
Applying for a business loan? Have your K-1s ready.
Business lenders require two years of personal tax returns — K-1s included. Start your application and see which products fit your profile.
Start an application →Common mistakes with Schedule K-1
Waiting on the K-1 to file your personal return. You can't file Form 1040 without K-1 figures. If your partnership or S-corp filed an extension, extend your personal return too (Form 4868) to avoid a late-filing penalty.
Ignoring basis limitations. You can only deduct your share of entity losses up to your tax basis in the partnership or S-corp. Losses exceeding basis are suspended and carry forward to future years when basis is restored.
Missing self-employment tax on partnership income. General partners and most LLC members taxed as partners owe self-employment tax on their share of ordinary income and guaranteed payments. S-corp distributions on the K-1 are not subject to SE tax — one of the structural reasons S-corp election can lower the self-employment tax bill for high-income owner-operators.
Confusing distributions with income. Distributions from a partnership or S-corp are a return of capital — not income — to the extent of basis. The K-1 shows income regardless of cash movement. Both can appear in the same year with very different tax consequences.
This article is for educational purposes and does not constitute tax, legal, or financial advice. Consult a qualified tax professional about your specific situation.