Operating Agreement vs. Partnership Agreement

If you’re starting a business with someone, whether it’s a co-founder, friend, or collaborator, you might be wondering: Do we need an operating agreement or a partnership agreement?

These two documents sound similar, and people use them interchangeably all the time. But legally? They’re tied to two very different business structures, and choosing the wrong one could affect your liability, taxes, and how much legal protection you actually have.

As a lawyer for content creators and digital entrepreneurs, I understand how easy it is to overlook the legal distinctions when you’re just trying to get a business off the ground. So let’s clear it up.

Legal Disclaimer: This post is for educational purposes only and does not constitute legal advice. Read full disclaimers.

First: The Core Difference

• An operating agreement is used by LLCs (Limited Liability Companies)
• A partnership agreement is used by general partnerships

That means the real question is: Have you formed an LLC or not?

Because if you haven’t, you’re probably in a general partnership by default, and that comes with more risk than most people realize.

Here’s how each structure works, what these documents actually include, and why the one you pick should match the business you’ve legally created.

What Is an Operating Agreement?

An LLC operating agreement is the internal legal document that governs how your LLC operates. It outlines ownership, decision-making, profit distributions, roles and responsibilities, what happens if someone leaves, and more.

Even if your state doesn’t require an operating agreement, every multi-member LLC should have one. And even single-member LLCs benefit from putting their rules in writing. Not just for formality’s sake, but to strengthen your liability protection and clarify business structure.

Most LLC operating agreements include:

• Member roles and contributions
• How profits (and losses) are divided
• Voting and decision-making rules
• Exit plans if someone wants out
• What happens if the business dissolves
• Dispute resolution options (like court vs. arbitration)

States That Require Operating Agreements

Some states legally require LLCs to have a written operating agreement. These include:

• California
• New York
• Missouri
• Delaware
• Maine

Even in states that don’t formally require one, banks, investors, and courts often want to see it, especially if your LLC is involved in a dispute or legal matter. Having a signed LLC operating agreement helps show that you’re treating the LLC as a real business entity (not just a hobby with an official-sounding name).

What Is a Partnership Agreement?

A partnership agreement is used when two or more people are operating a business together without forming an LLC or corporation. In that case, the business is legally considered a general partnership under your state’s default laws, whether you intended it that way or not.

Partnership agreements define:

• Each partner’s contribution (money, time, resources)
• How profits and losses are split
• How decisions are made
• What happens if one partner wants to leave or the business ends

But here’s the key difference: partners in a general partnership are personally liable for the business’s debts and obligations.

That means:

• If the business gets sued, your personal assets are fair game
• If your partner signs a contract or takes on debt, you can be held liable, even if you didn’t agree

Unless you’ve signed a clear partnership agreement, your state will assume equal ownership and joint liability. That might not reflect the reality of your business relationship, and it can cause serious problems later.

Key Differences: Operating Agreement vs. Partnership Agreement

Feature	Operating Agreement	Partnership Agreement
Tied to…	LLCs	General Partnerships
Limits personal liability?	Yes (if done right)	No
Filing required?	Only the LLC is filed	No formal filing required
Legal structure	Separate legal entity	Not separate. Partners = the business
Recommended for	Content creators, service providers, small business owners who want liability protection	Very short-term or low-risk collaborations where partners trust each other completely
Tax flexibility	Can elect to be taxed as partnership, S Corp, or sole prop	Defaults to partnership taxation
Business credibility	Stronger (LLC is a formal structure)	Often seen as informal or temporary

What Happens Without a Written Agreement?

If you don’t have an operating agreement (for an LLC) or a partnership agreement (for a general partnership), your state will apply default rules, even if they don’t reflect what you and your partner actually want.

Here’s what those default rules can mean:

• Equal ownership, even if one person did all the work or invested all the money
• Equal say in decisions, even if only one partner is actively managing
• No automatic way to remove a partner or handle buyouts
• No custom plan for dissolving the business
• In a general partnership, full personal liability for debts or lawsuits

Having a written agreement lets you customize the rules to fit your business, not whatever generic system your state imposes by default.

Which One Do You Need?

If you’ve officially formed an LLC (even a single-member one) then you need an operating agreement, not a partnership agreement.

If you haven’t filed anything with your state and just started working with someone, you’re probably in a general partnership by default, and that leaves you legally exposed. At the very least, you should have a partnership agreement. But ideally? Form an LLC.

Final Thoughts

So, operating agreement vs. partnership agreement: which one do you need?

It depends on your business structure:

• Formed an LLC? You need an LLC operating agreement.
• Haven’t formed anything? You’re in a general partnership by default, and you’re exposed to personal liability. Get a partnership agreement at a minimum. But the safer bet? Form an LLC and use a strong operating agreement that reflects how your business actually works.