What is the difference between a K-1 and a 1065?

Understanding Form 1065 vs. Schedule K-1: What’s the Difference?

When you're involved in a partnership, two tax forms often come into play: Form 1065 and Schedule K-1. While they're closely related, they serve very different roles in the tax process.

Form 1065 is the annual tax return filed by the partnership itself. Think of it as the master document that reports the business’s total income, deductions, gains, and losses. Even though the partnership doesn’t pay income tax directly, this form is required by the IRS to track the flow of money through the entity. It’s due each year, typically by March 15 for calendar-year businesses.

Once the 1065 is completed, the partnership issues a Schedule K-1 to each individual partner. This is where things get personal. The K-1 breaks down each partner’s share of the business’s profits or losses. This information is what each partner then reports on their individual tax return—usually Form 1040. So while the 1065 is about the business as a whole, the K-1 is about the individual's financial stake in it.

Mistaking one for the other can lead to confusion, especially during tax season. For example, a partner doesn’t file the 1065—only the partnership does. But every partner must receive and use their K-1 to file their own taxes correctly. The K-1 is essential for accurately reporting income and avoiding IRS flags.

As of April 10, 2026, these forms remain central to partnership taxation. Keeping them straight ensures smoother filings and fewer surprises. Bottom line: Form 1065 belongs to the partnership, and Schedule K-1 belongs to the partner. Know which one is yours.