If you and someone else have been running a business together without ever signing a partnership agreement, the rules that apply to you come from your state’s version of the Revised Uniform Partnership Act (RUPA). These default rules fill every gap: how profits get split, who can sign contracts, who pays the debts, and what happens when someone wants out. Several of them produce results most partners would never have agreed to if they had sat down and written something.1Legal Information Institute. Revised Uniform Partnership Act of 1997
You Can Be Partners Without Realizing It
A general partnership forms the moment two or more people start carrying on a business together for profit. No paperwork. No state filing. You don’t even have to intend to form one. If you’re co-owning a business and splitting the proceeds, the law treats you as partners.1Legal Information Institute. Revised Uniform Partnership Act of 1997
Not every shared financial setup counts. Co-owning property or splitting gross revenue from a one-off joint venture does not automatically create a partnership. What matters is sharing profits from an ongoing business. Receive a share of profits and the law presumes you are a partner, unless those payments are really something else: loan repayment, rent, or compensation to an independent contractor.
Profits Get Split Equally, And No One Earns a Salary
Without an agreement saying otherwise, every partner gets an equal share of the profits. It does not matter if one partner put in 90% of the startup money or works sixty-hour weeks while the other barely shows up. Straight equal split.
Losses follow the same ratio. If profits are divided equally, losses are divided equally. A partner who contributed most of the capital has no special protection from absorbing the same share of losses as everyone else.
Then the rule that stings most: partners are not entitled to a salary or any other compensation for work they do for the business. Their share of the profits is considered their entire pay. The only exception is reasonable compensation for work done during the winding-up period if the business is shutting down. A partner running day-to-day operations full-time while another partner stays passive cannot demand extra pay unless everyone agrees.
Partners do have the right to be reimbursed for out-of-pocket expenses paid in the ordinary course of business. And if a partner advances money to the partnership beyond their agreed contribution, the partnership must pay that back with interest from the date of the advance.
Any Partner Can Bind the Others
Under RUPA, every partner is an agent of the partnership. Any partner can sign contracts, take on debt, or enter agreements that legally bind every other partner, as long as the action looks like it falls within the ordinary scope of the business.
If your partner signs a lease, orders inventory, or hires an employee as part of normal operations, the partnership is on the hook. The only escape is if the partner had no actual authority and the person on the other side knew that. Outsiders rarely know about internal disputes over authority, so the partnership almost always ends up bound.
Actions outside the ordinary course of business require authorization from the other partners. But the burden of proving a transaction was outside normal operations falls on the partnership trying to avoid the obligation. Without a written agreement defining what “ordinary” means, that argument is hard to win.
Equal Management Say, And the Two-Partner Deadlock
Every partner has an equal vote in running the business, regardless of capital contribution or ownership percentage. Voting works on two tiers:
- Ordinary business decisions are resolved by a majority vote of the partners. Three partners disagreeing on a supplier means two can outvote the third.
- Extraordinary decisions require unanimous consent. Admitting a new partner, changing the fundamental nature of the business, or taking any action outside the ordinary course all fall here.
Two-person partnerships have a structural problem with this. Neither partner can form a majority alone, so every disagreement on an ordinary decision creates a deadlock. Without an agreement establishing a tiebreaker, persistent deadlock is one of the most common reasons two-person partnerships end up in court or dissolve.
Separately, every partner has the right to inspect and copy the partnership’s books and records during ordinary business hours, and each partner has a duty to share information about the business that the others reasonably need.
You Owe Each Other Fiduciary Duties Anyway
Even without a written agreement, partners owe each other real legal obligations. RUPA sets out two specific fiduciary duties plus a general obligation of good faith.
The duty of loyalty has three parts. A partner must account to the partnership for any profit or benefit derived from the partnership’s business or property. A partner cannot deal with the partnership as someone with a competing interest without disclosure and consent. And a partner cannot compete with the partnership while it is still operating.
The duty of care is narrower than most people assume. A partner only violates it through gross negligence, reckless conduct, intentional misconduct, or a knowing violation of law. Ordinary mistakes and bad business judgment do not create liability between partners. A partner who makes a poor investment decision has not breached the duty of care unless the decision was reckless or intentionally harmful.
Your Personal Assets Are On the Line
Every partner in a general partnership is personally liable for all of the partnership’s debts and obligations. The liability is joint and several, so a creditor can pursue any one partner for the entire amount, not just that partner’s proportional share. If your partner signs a contract that generates a $200,000 debt the business cannot pay, creditors can come after your personal assets for the full amount.
There is one layer of protection. Before a creditor can seize a partner’s personal property, they generally must first try to collect from the partnership itself. A court can override that requirement when partnership assets are clearly insufficient, when a judgment against the partnership has gone unsatisfied, when the partnership is in bankruptcy, or when the partner has waived the exhaustion requirement.
A new partner joining an existing partnership is not personally liable for debts incurred before they joined. Their investment in the business is at risk from older obligations, but their personal assets outside the business are protected from pre-existing debts.
What Belongs to the Partnership and What Belongs to You
Under RUPA, the partnership is a separate legal entity that owns its own property. Individual partners do not have direct ownership rights in specific partnership assets. A partner cannot sell, mortgage, or transfer partnership property on their own, and a partner’s personal creditors cannot seize partnership assets to satisfy that partner’s individual debts.
Sorting out which assets belong to the partnership gets messy without a written agreement. The default presumptions:
- Assets titled in the partnership’s name are partnership property.
- Assets bought with partnership funds are presumed partnership property, even if the title is in an individual partner’s name.
- Assets titled in a partner’s name and bought with that partner’s own money are presumed personal property, even if the business uses them regularly.
If you bought equipment with partnership money but put it in your own name, it still belongs to the partnership. If you use your personal truck for partnership deliveries but paid for the truck yourself, the partnership does not automatically own it. Receipts and payment records matter when there is no agreement spelling any of this out.
Any Partner Can End the Whole Thing by Leaving
Without an agreement setting a fixed duration, a partnership is a “partnership at will.” Any partner can leave at any time by giving notice. Under the 1997 version of RUPA that most states follow, a partner’s departure from a partnership at will triggers dissolution of the business by default.2OpenCasebook. Business Associations – Dissociation, Dissolution and Winding Up This is one of the most dangerous defaults for partnerships without a written agreement, because one partner walking away can force the entire business to shut down and liquidate.
Dissolution does not mean the business disappears overnight. It starts a winding-up period: the partnership stops taking on new business and focuses on finishing existing contracts, selling assets, paying creditors, and distributing whatever remains. Creditors get paid first. If anything is left, partners receive their capital contributions and then split any surplus according to the profit-sharing ratio, which defaults to equal shares.
If a partner’s account balance is negative after this process, that partner owes money to the partnership to cover the shortfall. Partners cannot simply walk away from losses.
When a partnership continues after a partner leaves, either because the remaining partners agree to carry on or because it is a fixed-term partnership, the partnership must buy out the departing partner’s interest. Without an agreed valuation method, disputes over what the business is actually worth tend to end up in litigation or arbitration.
Taxes Still Apply, and the Equal Split Follows You There
A partnership does not pay federal income tax as an entity. The partnership files an information return, Form 1065, each year, reporting total income, deductions, and credits, and allocates each partner’s share on a Schedule K-1. Each partner then reports their share on their personal return and pays tax at their individual rate.3Internal Revenue Service. 2025 Instructions for Form 1065 The filing deadline for calendar-year partnerships is March 15, and the return is required even in years with no income or a loss.4Internal Revenue Service. Publication 509 (2026), Tax Calendars
General partners also owe self-employment tax on their distributive share of the partnership’s ordinary business income and on any guaranteed payments.5Internal Revenue Service. Entities 1 The rate is 15.3%, split between Social Security (12.4%) and Medicare (2.9%). The Social Security portion applies to earnings up to $184,500 in 2026.6Social Security Administration. Contribution and Benefit Base Income above $200,000 for single filers or $250,000 for joint filers is subject to an additional 0.9% Medicare surtax. Passive income from the partnership, like interest, dividends, and capital gains, is not subject to self-employment tax.
Without an agreement allocating income differently, the equal split of profits also determines each partner’s reported taxable income. A partner who contributed more capital or worked more hours still reports the same taxable amount as everyone else. And partners owe tax on their share of partnership income whether or not the partnership actually distributed any cash that year. A profitable business that reinvests everything can leave each partner with a real tax bill and no money to pay it.