What is a k-1?

What Is a K-1 and Why It Matters for Law Firm Partners

If you're part of a law firm partnership—or considering becoming one—you've likely come across the term K-1. Officially known as IRS Schedule K-1 (Form 1065), this document isn't a paycheck like a W-2. Instead, it details your share of the partnership’s annual income, deductions, and tax credits.

Unlike employees who receive a W-2 and pay taxes on their wages, partners in a law firm are typically considered owners. That means the firm itself doesn’t pay income tax. Instead, profits and losses "pass through" to individual partners, who report their share on personal tax returns using the K-1. This setup is standard for partnerships, LLCs, and S corporations.

However, not all law firm partners are in the same situation. Some firms operate under hybrid structures or professional corporations (PCs), where partners might receive both a W-2 for services rendered and a K-1 for their ownership stake. This dual treatment reflects both employment-like compensation and equity participation.

The K-1 arrives each spring, usually after March, which can delay your personal tax filing. It’s crucial to review it carefully—errors can lead to IRS scrutiny. The form includes several boxes detailing ordinary business income, rental income, interest, deductions, and even self-employment tax allocations.

For partners, understanding the K-1 isn’t just about compliance—it’s about grasping how your role in the firm translates into financial responsibility. It reflects not just earnings, but also your share of the firm’s performance, for better or worse. In many ways, the K-1 is more than a tax form; it's a snapshot of your stake in the partnership’s success.