Partnership and Co-Owner Agreements in Oregon: The Contract Between the Owners Themselves
Parts 1 and 2 of this series covered contracts with people outside your business — clients and contractors. This one covers the contract with the people inside it. The stakes are higher for a simple reason: when a co-ownership breaks without an agreement, Oregon's default rules decide everything, and they were not written with your business in mind.
This is Part 3 of the Contracts That Actually Protect You series. Part 1 covered service agreements; Part 2 covered independent contractor agreements.
A dispute with a client costs you a project. A dispute with a contractor costs you some files and some sleep. A dispute with a co-owner puts the entire business on the table — because the person on the other side isn't outside the company, they're inside it, with signing authority, system access, and a legal claim on everything you've built together.
That's why the contract among owners is the highest-stakes document in this series, and why it's the one small businesses most often skip. Co-owners start as friends, family, or trusted colleagues, and drafting exit terms feels like planning the divorce during the honeymoon. So nothing gets written — and the owners are governed by default rules they've never read.
This blog has now documented, statute by statute, what those defaults do. This post is the map of the territory: what the co-owner agreement is for each kind of business, and the decisions it exists to make.
What the Defaults Do to Owners Who Never Wrote Anything
The case for a real co-owner agreement isn't hypothetical — it's four documented outcomes:
If you never formed an entity at all, you're general partners under Oregon's partnership statute, and as covered in the informal partnership post, a two-person partnership can't even do a clean buyout when one partner leaves — the default points to winding up the entire business.
If you formed an LLC, the trap inverts. As covered in the post on leaving an Oregon LLC, Oregon repealed the withdrawing member's buyout right decades ago: a member who quits keeps only an economic interest — no vote, no exit, no way to force anyone to buy them out.
If a co-owner dies, the LLC owner dies post documents the default inheritance: the family receives the economics but not the governance — a voteless interest, held by grieving people with no role and no way out.
And if co-owners simply stop agreeing, Oregon's defaults offer no expulsion mechanism, require unanimity to dissolve voluntarily, and leave a deadlocked 50/50 company with two exits: a deal or a courtroom.
Every one of those outcomes is a default — which means every one of them is optional, replaced by whatever the owners write instead. That's the entire function of the co-owner agreement.
What "the Agreement" Actually Is, by Entity
"Partnership agreement" gets used loosely, but the document depends on what you formed:
A general partnership — including the accidental kind — is governed by a partnership agreement, and it's the only thing standing between the partners and the statutory defaults above.
An LLC — the structure most Oregon co-owned small businesses actually use — is governed by its operating agreement. As covered in the operating agreement post, nearly every rule in Oregon's LLC statute begins with "except as provided in the operating agreement": the legislature wrote defaults expecting you to replace them. The exit machinery — triggers, valuation, payment terms, funding — typically lives inside it as buy-sell provisions, and as covered in the buy-sell agreements post, those provisions are the part that determines whether an ownership change is a transaction or a lawsuit.
A corporation splits the job between bylaws and a shareholder agreement, with the shareholder agreement carrying the transfer restrictions and buyout terms.
Different documents, same function: one governing contract, drafted for your actual entity and your actual owners, that answers the ownership questions before they're asked.
The Five Decisions Every Co-Owner Agreement Must Make
Whatever the entity, the agreement earns its keep by deciding five things the defaults decide badly:
Who runs what. Management structure, signing authority, and which decisions require a vote — with thresholds set deliberately: what passes by majority, what needs everyone.
How the money works. Contributions, what happens when more capital is needed, how profits are allocated, and when distributions happen — the single most common source of resentment between working and passive owners.
What breaks a tie. For 50/50 owners, a deadlock mechanism isn't optional; without one, every serious disagreement is existential, and the statutory tiebreaker is a judge.
How owners exit — in every direction. Voluntary departure, death, disability, divorce, expulsion for cause: each needs a trigger, a valuation method chosen with eyes open, payment terms the company can survive, and funding that actually exists.
Who can ever hold an interest. Transfer restrictions, rights of first refusal, and buyback rights when an interest lands somewhere nobody chose — an ex-spouse, a creditor, an heir.
None of these have standard answers, which is why the template version of this document fails at precisely the moments it exists for — and why the drafted-but-never-signed version, sitting unexecuted in a formation folder, fails more cruelly still, governing nothing while everyone believes the matter is handled.
When to Do This
The honest answer is: while everyone still likes each other. Every provision above is cheap to negotiate when it's hypothetical and expensive to litigate when it's live. The best time was formation; the second-best time is now, while agreement is still possible.
And if you're reading this because the falling-out has already arrived — the agreement that doesn't exist can't be retrofitted, but the separation can still be structured. As covered in the business divorce post, co-owner splits have their own playbook, and the earlier counsel enters, the more of the business survives it.
Bottom Line
Contracts with clients and contractors protect individual relationships. The contract among owners protects the business itself — from the statutory defaults that wind up two-person partnerships, trap withdrawing LLC members, hand voteless interests to grieving families, and leave deadlocked owners a choice between a deal and a courtroom. Every one of those outcomes is optional. The co-owner agreement is where you opt out.
At Track Town Law, a custom operating agreement is included in every LLC formation package, and I draft and review partnership agreements, buy-sell provisions, and shareholder agreements for existing Oregon and Idaho businesses — billed hourly and scoped with you before any work begins. Book a free consultation here.
This post is for general informational purposes only and does not constitute legal advice. Co-ownership structures are fact-specific. Contact a licensed Oregon business attorney to discuss your company's governing documents.
