How a Partnership Files Taxes

A partnership — including a multi-member LLC taxed as a partnership by default — is a "pass-through" entity. The business itself pays no federal income tax. Instead, it files an informational return on Form 1065, calculates total profit or loss, and issues each partner a Schedule K-1 showing their share. Each partner then reports that share on their personal return and pays tax individually.

The Form 1065 deadline is March 15, 2026 for calendar-year partnerships — a full month before the personal April 15 deadline. This earlier date exists precisely so partners receive their K-1s in time to file their personal returns.

How the Profit Split Works

Profit is allocated according to the partnership agreement. Most agreements default to ownership percentages, but the agreement can specify different splits — including special allocations that reward one partner for contributing capital and another for contributing labor.

Consider a two-member LLC taxed as a partnership with $200,000 in net profit, split 60/40:

PartnerOwnershipK-1 ProfitSE Tax (15.3%)
Partner A60%$120,000$16,952
Partner B40%$80,000$11,304
Partnership total100%$200,000$28,256

Each partner calculates SE tax on their own K-1 amount using the same 92.35% factor and 15.3% rate as a sole proprietor. The Social Security portion (12.4%) applies up to the $168,600 wage base in 2026; the 2.9% Medicare portion has no cap. Run your K-1 amount through the Self-Employment Tax Calculator to plan your quarterly payments.

The Schedule K-1: What Each Partner Reports

The K-1 is the bridge between the partnership return and each partner's personal return. It breaks down the partner's share into categories that flow to different parts of Form 1040:

  • Ordinary business income or loss: Flows to Schedule 1, Line 5
  • Interest and dividends: Flow to Schedule B
  • Rental real estate income: Flows to Schedule E
  • Guaranteed payments: Subject to SE tax, flow to Schedule C or Schedule 1
  • Section 179 expense: Equipment expensing up to $1,110,000 in 2026, allocated per partner
  • Retirement plan contributions: Deductible on the partner's return
Pro Tip: A partnership can deduct contributions to a Solo 401(k) or SEP-IRA on behalf of partners, but the contribution limits are based on each partner's K-1 earned income — not the partnership's total profit. A partner with $120,000 on their K-1 can contribute up to $69,000 to a Solo 401(k) for 2026, combining employee deferral and employer contribution.

The March 15 Deadline and Extensions

Missing the March 15 Form 1065 deadline is expensive. The late-filing penalty is $245 per partner per month, capped at 12 months. A three-partner partnership filing two months late owes $1,470 — even if the partnership lost money and owes no tax. The penalty applies to the return, not the tax.

You can extend the filing deadline by six months (to September 15) by filing Form 7004 by March 15. The extension is automatic — no explanation required — but it only extends the filing, not any tax owed. Partners should still pay estimated taxes based on their expected K-1 income by April 15.

IRS Warning: Even partnerships with zero income or activity must file Form 1065. The $245-per-partner penalty accrues whether or not the partnership made a profit. If your partnership was inactive in 2026, file the return anyway — many software providers can prepare a "zero" 1065 in minutes.

Guaranteed Payments to Partners

Partners are not employees, so they do not receive W-2 wages. Instead, a partner who provides services can receive a "guaranteed payment" — a fixed amount paid regardless of partnership profit. Guaranteed payments are deductible by the partnership (lowering the profit split) but taxable to the receiving partner as ordinary income subject to SE tax.

For example, if Partner A receives a $50,000 guaranteed payment for managing the business and the partnership earns $200,000 before that payment, the partnership reports $150,000 in ordinary income ($200,000 − $50,000) split 60/40, plus Partner A reports the $50,000 guaranteed payment separately on their K-1.

Quarterly Estimates for Partners

Because the partnership pays no tax, each partner must make quarterly estimated payments on their K-1 income. The 2026 due dates are April 15, June 15, September 15, and January 15, 2027. Partners who also have W-2 wages can increase withholding via Form W-4 instead of making separate quarterly payments. Use the Tax Deduction Finder to identify partnership-level deductions that lower each partner's K-1 income.

The Bottom Line

A partnership files Form 1065 by March 15, issues Schedule K-1s to each partner, and pays no federal income tax itself. Partners report their K-1 share on their personal returns and pay both income tax and 15.3% SE tax on their portion. File on time — the $245-per-partner monthly penalty adds up fast — and request an extension with Form 7004 if needed. Track partnership deductions with the Tax Deduction Finder and model each partner's SE tax with the Self-Employment Tax Calculator before each quarterly deadline.