What is a Partnership Agreement?

By Michael D. Rubin, CEO & Founder · Updated September 2026 · 817 words

A partnership agreement is the written contract between the co-owners of a business that sets out who owns what, who decides what, how money is shared and what happens when an owner leaves, dies or wants out. It exists so the partners make those decisions together, calmly, at the start, instead of in the middle of a dispute.

Anyone planning to buy or run a business with a partner, whether a friend, a relative or an investor, should have one signed before money changes hands.

What the agreement does that the law will not

If co-owners never sign an agreement, state law fills the gaps with default rules. Those rules were written for businesses in general, not for yours. In a general partnership, the defaults tend to give each partner an equal say and an equal share of profits, regardless of who put in more money or more hours. That may be the opposite of what you intended.

The document's name depends on the type of entity. A general partnership has a partnership agreement. Most co-owned companies today are limited liability companies, and in Texas an LLC's governing contract is usually called a company agreement; elsewhere it is often called an operating agreement. A corporation uses bylaws and a shareholders' agreement. The label changes, the job does not. One reason owners choose an LLC or a corporation over a general partnership is liability, since general partners can be personally responsible for the partnership's debts; your attorney will advise on the structure that fits.

The basics every agreement covers

Agreements vary in length, but a sound one answers these questions:

• Who the parties are and what the business is, including its name and purpose.
• Who owns what, and what each owner contributed in cash, property or work.
• How profits and losses are shared, and whether owners draw a salary or regular distributions.
• Who manages what, and which decisions need everyone's approval.
• How new money is raised if the business needs it, and what happens if an owner cannot contribute.
• How an owner leaves, and how their share is valued and paid for.
• How disputes are resolved before anyone goes to court.

Why it matters when you buy a business with a partner

Co-buyers often focus on finding the company and arranging the loan, and leave the partnership paperwork for later. That is backwards. The seller, the seller's advisor and the lender all want to know who is buying, who will run the business and who stands behind the debt. Lenders usually ask the owners to guarantee acquisition debt personally, and a partner who signs a guarantee will want a clear say in how the business is run. Settling those questions in writing before the letter of intent makes you a more credible buyer; our overview of acquisition financing shows how lenders look at a buying group.

It also shapes how you buy. Whether you acquire the assets of the business or the entity itself, you will usually do it through a company you and your partner form for the purpose, and that company's agreement is your partnership agreement. Our explainer on asset versus ownership-interest sales describes the difference from the seller's side.

What happens without one

The problems rarely appear in the good years. They surface when something changes. Each of these can be settled in a paragraph at the start; settled in the middle of a disagreement, each can cost the business its value and the partners their friendship.

• One partner works full time in the business while the other keeps a day job, and resentment builds over an equal profit split.
• The business needs cash, and one partner cannot or will not put more in.
• A partner dies or divorces, and a spouse or heir becomes an unexpected co-owner.
• One partner wants to sell the company and the other does not.
• A partner wants to leave, and nobody agreed how their share would be valued.

Who should write it

Use a business attorney, not a template. Templates cover the generic points and miss the ones specific to your situation: unequal contributions, one partner acting as the operator, a lender's conditions, family members. Ask your CPA to review how profits, losses and distributions are allocated, because those choices carry tax consequences for each partner. Expect a few rounds of drafts. The conversations they prompt are part of the value.

What we see from the seller's side

MDR & Associates represents owners selling established Texas companies with $3 million to $100 million in annual revenue, and we regularly work with buyer groups made up of two or more partners. A group that arrives with its ownership, decision-making and financing settled moves faster through our screening, which includes an NDA and a financial profile. We can also arrange SBA, conventional and seller-financed structures when a deal needs one. To see which companies are for sale, visit buy a business.

Where this fitsBuy a business in Texas →

Questions owners ask next

Do we need a partnership agreement if we form an LLC?

Yes, though it goes by a different name. An LLC's company or operating agreement does the same job: ownership, profit sharing, decisions and exits. Without one, default state rules apply, and they may not match what the owners intended, particularly when contributions or roles are unequal.

Can we change a partnership agreement later?

Yes. Most agreements state how they can be amended, often with every owner's written consent. Revisit yours when something significant changes, such as a new partner, a major loan, a change in who runs the business or plans to sell. An outdated agreement can cause almost as much trouble as none.