The Handshake Partnership: What Happens When an Informal Oregon Business Partnership Falls Apart

You never filed anything. You never signed anything. You and someone else just started doing business together — and under Oregon law, that made you general partners, whether you meant to or not. Here's what that means when one of you wants out.

Some of the riskiest business structures in Oregon were never chosen. Two friends start flipping houses together. A couple of tradesmen begin bidding jobs as a team and splitting the money. Someone joins a buddy's growing side business, puts in money and hours, and takes a share of the profits. Nobody files anything with the state. Nobody signs anything. Ask them what their business structure is and they'll shrug: "We're partners, I guess."

Under Oregon law, that shrug is doing a lot of work. If two or more people carry on a business as co-owners for profit, they have formed a general partnership — automatically, whether they intended to or not, and whether they know it or not. ORS 67.055 doesn't require a filing, a document, or even the word "partnership." The relationship itself creates the entity.

That works fine while everyone gets along. When it stops working — one partner wants out, or wants the other out — the informality that made the arrangement easy to start makes it remarkably hard to end. There's no operating agreement to consult, because there's no agreement at all. What fills the vacuum is ORS Chapter 67, Oregon's partnership statute, a set of default rules that neither partner chose and that most have never read.

This post is about those rules: what they do to an informal partnership when the partners fall out. One important scope note before we start: if you and your "partner" formed an LLC, none of this applies to you. LLC members are governed by an entirely different statute with very different exit rules — one member leaving does not dissolve an LLC — and that's a topic for its own upcoming post. This post is for the business that was never formed at all: the handshake partnership.

How You Ended Up in a Partnership Without Meaning To

Oregon doesn't ask whether you intended to form a partnership. It asks how you behaved. Under ORS 67.055, a partnership is created when two or more people associate to carry on a business as co-owners for profit — and receiving a share of the profits of a business is presumptive evidence of being a partner.

That presumption catches people constantly. Splitting profits, sharing control over business decisions, jointly owning business assets, holding yourselves out as a team — these are the ingredients. No one factor is decisive, but a course of conduct adds up, and by the time there's money worth fighting over, there's usually years of conduct establishing exactly the relationship neither person documented.

Two consequences follow immediately, and both surprise people.

First, you are personally liable for the business's obligations — and for your partner's business conduct. In a general partnership, each partner is personally liable for partnership debts, and each partner can bind the partnership in the ordinary course of business. Your partner signs a bad contract, your personal assets are reachable. There's no entity standing between you and the business's creditors, because you never created one.

Second, a statute you've never read governs your exit. With no written agreement, ORS Chapter 67's default rules control everything: whether the business survives a partner leaving, what a departing partner is owed, when they get paid, and what happens to the debts. Those defaults were written for the general case. They were not written for your situation, and they routinely produce outcomes neither partner expects.

Here's what they say.

The Rule That Surprises Everyone: Two Partners Means No Buyout

Start with the most common informal partnership — exactly two people — because Oregon's default rules treat it in a way almost nobody anticipates.

The intuition most people carry is that if one partner wants out, the other buys them out and carries on. And Oregon law does contain a mandatory buyout provision, ORS 67.250, under which a partnership must purchase a departing partner's interest at fair value. But that provision only applies when the partnership continues after the partner leaves.

A two-person partnership cannot continue when one person leaves. ORS 67.290(7) provides that a partnership is dissolved when there are no longer two or more partners carrying on as co-owners — and a one-person partnership is a contradiction in terms. When one of two partners departs, the statutory text points to automatic dissolution: not a buyout, but a winding up of the entire business. Assets liquidated or divided, creditors paid, and whatever remains distributed through a settlement of accounts under ORS 67.315.

Worth knowing: courts in other states applying similar partnership statutes have divided over whether a two-person partnership can avoid this result when the remaining partner wants to continue the business. That uncertainty is not a comfort — it's one more reason these separations call for legal guidance rather than assumptions.

The practical reality is a leverage standoff. The remaining partner who wants to keep the business has no statutory mechanism that hands it to them — they need to negotiate for the departing partner's interest or restructure into a new entity. The departing partner who wants a clean buyout has no statutory right to demand one. Both sides need a deal, and neither can compel one. This is where informal two-person partnerships either settle sensibly or become the lawsuit both people swore they'd never file.

Three or More Partners: Now There's a Buyout — By Default

The analysis changes with a third partner. If one partner withdraws from a three-or-more-person informal partnership, the business is not automatically dissolved. Under ORS 67.290(1), dissolving an at-will partnership requires the express will of a majority of the remaining partners — Oregon deliberately rejected the older rule that let any single partner dissolve the partnership by giving notice, which means most national articles on this subject are wrong as applied to Oregon.

If the remaining partners want to continue, the business continues — and now ORS 67.250 does apply. The partnership must buy out the departing partner's interest. The key default rules:

The price is fair value as of the date of departure, with interest running until payment. Fair value is a determination, not a number in the books — in contested cases it means appraisals and, sometimes, dueling experts.

No minority discount. Oregon law prohibits reducing the buyout price because the departing partner held a minority interest. A one-third partner is entitled to a proportionate share of the business's value, not a discounted figure reflecting lack of control.

A written demand starts a 120-day clock. If no agreement is reached within 120 days after a written demand for payment, the partnership must pay its own estimate of the buyout price, in cash, with supporting financial documentation. A departing partner who makes a proper demand forces the issue.

Deadlines are short and unforgiving. A partner who disputes the partnership's number must generally sue within 120 days after payment is tendered — or within one year of a written demand if nothing was tendered. Sitting on your rights forfeits them.

Bad faith has a price. A court can award attorney fees and expert costs against a party who acted arbitrarily, vexatiously, or in bad faith — including a partnership that stonewalls a departing partner's demand.

Leaving Early From a Term Partnership

Some informal partnerships aren't open-ended — they were formed for a specific venture. Flip these three houses. Complete this contract. Run this food cart through the season. Oregon treats these as partnerships for a definite term or particular undertaking, and leaving before the finish line is wrongful dissociation under ORS 67.225.

A wrongfully departing partner is liable for the damage their exit causes, and that liability is deducted from whatever buyout they're owed. But the harsher default is timing: a partner who wrongfully leaves before the term ends is generally not entitled to any payment until the term expires or the undertaking is complete, unless they persuade a court that earlier payment won't harm the business. Walk away from a five-year venture in year two, and you may hold a claim you cannot collect for three years — against a business you no longer control.

The Exit Doesn't End Your Exposure

The most dangerous misunderstanding in informal partnership breakups is the belief that walking away ends your liability. It doesn't.

You remain personally liable for partnership obligations incurred while you were a partner. And under ORS 67.255, the partnership can be bound by your former partner's actions — and you can be bound by theirs — for up to six months after departure, where the outside party reasonably believed they were still dealing with a partner and had no notice otherwise. A partner who leaves without documentation and without notifying the business's vendors, customers, and bank hasn't actually left in the eyes of the people who matter.

Formal written notice to third parties isn't a nicety. It's how you stop the clock on new liability.

If a Judge Has to End It

When the partners are deadlocked — the business can't function, but the requisite majority won't vote to wind up — a partner can ask the circuit court to dissolve the partnership under ORS 67.290(5). The most commonly invoked ground: another partner has engaged in conduct that makes it not reasonably practicable to carry on the business with them. It's an inherently adversarial proceeding in which both partners' conduct is examined, and it's the most expensive path on this page. It's what happens when everything else has failed.

Why the Informal Partnership Is the Worst Structure to Unwind

Step back and look at what the defaults produce. Two-person partnerships — the most common kind — get automatic dissolution and a leverage standoff instead of a buyout. Larger partnerships get a buyout on statutory terms nobody chose, with deadlines measured in 120-day windows. Term partnerships trap early leavers' money until the venture ends. And everyone remains personally liable, with a six-month tail, until the exit is properly documented and noticed.

Every one of those outcomes could have been different with a written agreement — and better still with an actual entity. The informal partnership combines unlimited personal liability while it operates with the messiest possible rules when it ends. It is the maximum-risk structure at both ends of the business's life.

If you're in a functioning informal partnership right now, the most valuable thing you can do is formalize it before you need these rules — typically by forming an LLC with a real operating agreement that answers the exit questions in advance. As covered in the LLC operating agreement post, the governing document is where owner exits are supposed to be decided — deliberately, in writing, while everyone still likes each other. And as covered in the buy-sell agreements post, the provisions governing an owner's departure are worth far more than they cost to draft.

If the falling-out is already happening, the sequence matters: understand which of the configurations above you're in before you take a position, get a credible valuation early, document the separation in a written agreement with releases, and give formal notice to every third party the business deals with. Each of those steps done wrong — or skipped — has a specific statutory cost described above.

Bottom Line

If you've been running a business with someone else and never formed an entity, Oregon law made you general partners years ago, and Oregon's default rules — not any agreement of yours — govern what happens now that things are ending. For two-person partnerships, that likely means winding up the business entirely, not a buyout. For larger ones, it means a mandatory buyout on statutory terms with short deadlines. For everyone, it means personal liability that outlasts the handshake.

None of this is navigable casually, and the people who try tend to discover the deadlines and defaults only after they've run. If your informal partnership is coming apart — or if it's working fine and you'd like to keep it that way by putting real structure under it — the time to get advice is now.

Coming next: many Oregon business partners aren't in a partnership at all — they're co-members of an LLC, where the exit rules are entirely different and one member leaving does not dissolve the company. That's the subject of an upcoming post.

At Track Town Law, I help Oregon and Idaho business owners untangle partner separations and build the structures that prevent them. Book a free consultation here.

This post is for general informational purposes only and does not constitute legal advice. Partnership disputes are highly fact-specific, and outcomes depend on your circumstances, your conduct, and any agreements between you. Contact a licensed Oregon business attorney to discuss your situation.