The core characteristics of a partnership are shared profits and losses, mutual agency, unlimited personal liability, fiduciary duties between partners, pass-through taxation, co-ownership with equal management rights, and limited transferability of ownership interests. Together these traits mean two people who agree to run a business and split what it earns have formed a partnership, with all the legal consequences attached, whether or not they ever signed anything calling it one.
How a Partnership Comes Into Existence
A general partnership does not require any filing with a state agency. Two people who start buying inventory together, splitting revenue, and making decisions jointly have likely created one, intentionally or not. A written partnership agreement is not legally required either, though operating without one invites disputes.
When no agreement exists, default rules under partnership law fill every gap, and those defaults often surprise people. The law imposes equal profit sharing and equal control regardless of who contributed more capital or does more of the work. A well-drafted agreement typically spells out profit and loss splits, decision-making authority, what happens when someone wants to leave, and how the business is valued if a buyout becomes necessary.
One administrative step does apply at the federal level. A partnership needs an Employer Identification Number from the IRS before it can open a business bank account, hire employees, or file its annual tax return.1Internal Revenue Service. Get an Employer Identification Number
Shared Profits and Losses
Shared profits are the single strongest indicator that a partnership exists. Under the Uniform Partnership Act, adopted in some form across nearly every state, receiving a share of business profits creates a legal presumption that you are a partner. The presumption does not apply when the payment is really for something else, such as repayment of a loan, wages for work performed, or rent on property.
Losses track the same split. If the agreement is silent on how to allocate losses, the default rule assigns them in the same proportion as profits. Two partners who split profits equally absorb losses equally too, even if they never talked about it. This shared financial exposure is what separates a partner from a lender or an employee. A lender expects a fixed return regardless of how the business performs. A partner’s personal wealth rises and falls with the venture.
Mutual Agency
Every partner in a general partnership acts as an agent of the business. When one partner signs a supply contract, hires a vendor, or takes out a line of credit in the normal course of operations, that action binds the entire partnership. The other partners are on the hook even if they did not know about the deal.
Third parties are entitled to rely on a partner’s apparent authority. The partnership is only free from the obligation if the acting partner had no actual authority and the third party knew that. Proving what a third party knew is difficult, so most disputes end with the partnership paying.
Actions outside the ordinary course of business are different. Selling the firm’s primary real estate or fundamentally changing what the business does requires the consent of all partners. A single partner cannot make those decisions alone.
Unlimited Personal Liability
This is the characteristic that pushes many business owners toward an LLC instead. In a general partnership, every partner is jointly and severally liable for all obligations of the business. “Jointly and severally” means a creditor can pursue any one partner for the full amount of a debt, not just that partner’s proportionate share. If the business owes $200,000 and your partner disappears, creditors can come after your personal bank accounts, your car, and your home equity for the entire amount.
The exposure applies regardless of which partner created the obligation. You could be a 10% partner who had nothing to do with a particular contract, and a creditor can still pursue you for the full balance if the business and the other partners cannot pay. Recovery typically starts with partnership assets, but the ultimate backstop is each partner’s personal wealth. The risk persists even when you had no knowledge of the transaction.
Co-Ownership and Equal Management Rights
Partners collectively own the assets used in the business, and every partner has an equal right to participate in management. Under default partnership law, each partner gets one vote regardless of how much capital they contributed. Routine disagreements are resolved by majority vote. Actions outside the ordinary course of business require unanimous consent.
The equal footing extends to information. Every partner has the right to inspect the partnership’s books and records during normal business hours. A partner who is being frozen out of financial information has a legal basis to demand it, and the right to inspect records survives after a partner leaves, at least for the period during which they were a partner. These management and information rights are what separate a partner from an employee or investor who may hold a financial interest but no authority over how the business operates.
Fiduciary Duties Between Partners
Partners owe each other two core fiduciary duties: loyalty and care. They apply automatically in every partnership and impose real constraints.
The duty of loyalty means a partner cannot compete with the partnership, cannot use partnership property for personal gain, and must account to the partnership for any profit derived from the business. Discovering a business opportunity through the partnership and taking it personally instead of presenting it to the firm breaches this duty. The duty of care requires each partner to avoid grossly negligent or reckless behavior when managing the business. Honest mistakes that turn out badly are not breaches, but unreasonable risks or intentional corner-cutting can trigger liability to the other partners.
Partners also owe a general obligation of good faith and fair dealing. That includes full transparency about material information. Hiding a side deal, failing to disclose a conflict of interest, or misleading your partners about the firm’s financial condition can all support a breach-of-fiduciary-duty claim.
Pass-Through Taxation and Self-Employment Tax
A partnership does not pay federal income tax as a separate entity. The partnership files an information return on Form 1065, and each partner receives a Schedule K-1 showing their share of income, deductions, and credits.2Internal Revenue Service. Partnerships Partners then report those amounts on their personal returns. Profits are taxed once, at the individual level, rather than at the entity level and again on distribution the way C corporation earnings are.3Office of the Law Revision Counsel. 26 US Code 701 – Partners, Not Partnership, Subject to Tax
The catch is self-employment tax. A partner’s distributive share of ordinary business income is generally treated as self-employment income subject to Social Security and Medicare taxes, even if the partner did not actually withdraw the money.4Internal Revenue Service. Self-Employment Tax and Partners The combined self-employment tax rate is 15.3%, and partners can deduct half of it when calculating adjusted gross income. Partners new to paying their own employment taxes are often caught off guard, especially in profitable years when the bill arrives well after the income was earned.
Calendar-year partnerships must file Form 1065 by March 15 following the close of the tax year, and each partner’s Schedule K-1 must be furnished by the same deadline.5Internal Revenue Service. About Form 1065, US Return of Partnership Income
Limited Transferability of Partnership Interests
A partner cannot freely sell or transfer their full partnership interest to an outsider without the consent of the other partners. Under default rules, a partner can assign the right to receive distributions, but the buyer does not become a partner with voting rights or management authority. Admitting a new partner requires unanimous consent from the existing ones. That makes partnership interests far less liquid than corporate stock, which can typically be sold to anyone willing to buy it.
The restriction exists because partnerships are built on personal trust. The other partners chose to go into business with specific people, and the law does not force them to accept a stranger as a co-owner with management power. A partnership agreement can relax or tighten these defaults, but with no agreement, unanimity controls.
Dissolution and Winding Up
Partnerships are more fragile than corporations in one important respect: specific events can trigger dissolution and force the business to wind down whether or not it is profitable. In a partnership at will, meaning one with no fixed term, any partner can force dissolution simply by notifying the others of their intent to withdraw. In a partnership formed for a specific term or project, dissolution occurs when the term expires, the project is completed, or all partners agree to wind up.
Other triggers include a partner’s death, a court order finding the partnership’s economic purpose has been frustrated, or an event that makes the business illegal. A partnership agreement can override some of these defaults by specifying what happens when a partner dies or withdraws, often through a buyout provision that keeps the business intact rather than forcing liquidation. Without such a provision, the remaining partners may find themselves selling off assets to settle accounts, even if the business was thriving.
During winding up, the partnership pays outside creditors first, then settles amounts owed to partners for loans they made to the business, and finally distributes any remaining assets based on each partner’s capital account.
Limited Partnerships and LLPs Change the Liability Picture
Not every partnership carries all these characteristics. Two variations modify the general partnership model enough to be worth knowing about before you commit.
A limited partnership has at least one general partner with unlimited liability and management control, alongside one or more limited partners who contribute capital but stay out of day-to-day operations. Limited partners risk only the amount they invested. If they start actively managing the business, they may lose that liability protection.
A limited liability partnership, common among law firms and accounting practices, protects each partner from personal liability for the malpractice or negligence of another partner. A partner who commits the malpractice remains personally liable for their own conduct, but the innocent partners are shielded. Most states require LLPs to register with the state and maintain professional liability insurance.
Both LPs and LLPs share the pass-through tax treatment and much of the agency and fiduciary framework of a general partnership. What they narrow is the liability exposure, and that is the characteristic of a general partnership that causes the most regret.