A cofounder agreement must include eight things: roles and responsibilities, the equity split, a vesting schedule, IP assignment, decision authority, compensation, confidentiality and non-compete terms, and exit or buyout provisions. Add dispute resolution to break a deadlock. Everything else is detail. Get these down in writing before you write a line of code together.
Why the agreement matters more than the trust
You started this partnership because you trust each other. Good. That trust is the reason you can operate together at all. It is not a document.
The hard truth: most cofounder blowups do not start as betrayals. They start as two people who assumed different things and never said so out loud. One thought the split was earned over time. The other thought it was locked on day one. One assumed they owned the code they wrote before incorporation. The other assumed the company did.
A cofounder agreement surfaces those assumptions and turns them into agreements you can point to later. Document it before it becomes an argument.
The cofounder agreement checklist
Here is what belongs in the contract. Work through each row. If you cannot answer a cell, that is exactly the conversation to have now.
| # | Clause | What it settles | Why it bites if you skip it |
|---|---|---|---|
| 1 | Roles and responsibilities | Who owns what — titles, domains, and decision scope | Overlap breeds power struggles; gaps mean no one owns the hard call |
| 2 | Equity split | Each founder's ownership percentage and the rationale | The single most common source of founder resentment |
| 3 | Vesting schedule | How and when equity is earned — cliff and term | A founder can leave in month three and keep a slice forever |
| 4 | IP assignment | The company owns work created before and after incorporation | Investors walk if IP sits with an individual, not the company |
| 5 | Decision authority | What one founder decides alone vs. what needs consent | Deadlock stalls the company at the worst possible moment |
| 6 | Compensation | Salaries, time commitment, full-time vs. part-time | "I thought you were all-in" ends more startups than the market |
| 7 | Confidentiality and non-compete | What stays inside; what a leaver cannot take | A departing founder walks off with your roadmap and your hires |
| 8 | Exit and buyout | Voluntary exit, removal, buyback price, good vs. bad leaver | Nobody knows what a departure costs until it is happening |
| 9 | Dispute resolution | Mediation, arbitration, or a tie-breaker for a split vote | Two founders at 50/50 with no tie-breaker is a frozen company |
Roles and responsibilities
Divide roles by skill, not by ego. Write down titles and the authority that attaches to each one. The point is not a rigid org chart on day one. The point is that no decision falls through the crack between "I thought you had it" and "I thought you had it."
Equity, vesting, and IP — the three that draw blood
These three clauses cause the most damage when they are vague, so treat them as their own tier.
Equity. State each founder's percentage and the reasoning behind it in writing. If one founder brings more capital, more IP, or more runway of prior work, the rationale belongs on the page. Our deeper guide on how to split equity between cofounders walks through the models. Settle the number here, in the agreement.
Vesting. Equity should be earned, not gifted. The standard is a four-year schedule with a one-year cliff — a founder earns nothing until the one-year mark, then vests the rest over the following three years, with the company able to repurchase unvested shares if they leave (Failory). That structure protects the founders who stay. See cofounder vesting schedules and cliffs for the mechanics.
IP assignment. This one surprises people. Under U.S. copyright law, work vests in the individual who created it by default — not the company. So the agreement needs an express IP assignment covering both pre-incorporation and post-incorporation work related to the business (EquityList). Skip it and your next investor's lawyer will find the gap in diligence.
Decision authority
Name what each founder can decide alone, and name the reserved matters that need collective consent — a raise, a key hire, a sale. Then set a threshold: majority, supermajority, or unanimous. For a two-person company splitting 50/50, add a tie-breaker before you need one. Reserved matters without a deadlock mechanism is how a company freezes (EquityList).
Compensation and commitment
Write down who is full-time, who is part-time, what each person is paid, and when that changes. Money is only half of it. The bigger fracture is time. "I thought you were all-in" is a partnership killer, and it is entirely preventable with one line in the agreement.
Confidentiality, non-compete, and exit
Confidentiality keeps your secrets inside. Non-compete and non-solicit stop a leaver from walking off with your roadmap and your team. And the exit clause is the one everyone avoids and everyone needs: how shares are handled when a founder leaves, the buyback price, and whether they are a good leaver or a bad leaver — terms that carry no statutory meaning in the U.S., so you must define them yourselves (EquityList).
Don't start from a blank page
You do not need to draft this from scratch. Start from a proven structure, then fill in the terms that are specific to your partnership. Our founders agreement templates and legal toolkits give you the clause-by-clause scaffolding, so the only work left is the decisions — which is the work that actually matters.
Use the template for the contract. Have a lawyer review it before you sign; equity, vesting, and IP often need supporting documents to be fully effective.
The agreement is the floor, not the ceiling
A signed contract settles the legal terms. It does not keep two founders aligned as the company changes. Roles shift. One of you wants to raise; the other wants to stay lean. The agreement you signed at incorporation says nothing about the decision in front of you today.
That is the gap between a legal document and an operating partnership. The contract fixes the terms once. Staying aligned means you keep the agreements current as the business moves. Our approach turns those partnership dynamics into a living Blueprint — the agreements you actually operate by, documented and kept current, not filed and forgotten.
Sign the agreement. Then keep operating together on purpose. Turn assumptions into agreements — and keep them current.
Frequently asked questions
- What should a cofounder agreement include?
- A cofounder agreement should include roles and responsibilities, equity split, vesting schedule, IP assignment, decision authority, compensation, confidentiality and non-compete terms, exit and buyout provisions, and dispute resolution. Each clause turns an assumption into a written agreement you can point to later.
- Do you need a cofounder agreement if you trust your cofounder?
- Yes. Trust is why the partnership starts, not a substitute for documented terms. A cofounder agreement protects the relationship by making expectations explicit before money, equity, or a departure puts them under pressure. You write it while everyone is aligned, not while you are arguing.
- Is a founders agreement legally binding?
- A founders agreement is a binding contract when properly signed, and courts will generally enforce its terms. Equity, vesting, and IP assignment often need supporting documents such as a Restricted Stock Purchase Agreement and formal IP assignment to be fully effective. Have counsel review it before signing.
- When should cofounders sign an agreement?
- Sign as early as possible, ideally before or at incorporation and before significant work or IP is created. Signing early keeps equity clean, locks in vesting from day one, and assigns pre-incorporation work to the company. The longer you wait, the harder the conversation gets.
- What is the difference between a founders agreement and an operating agreement?
- A founders agreement governs the relationship between cofounders: roles, equity, vesting, and exits. An operating agreement or bylaws govern the legal entity itself and its members or shareholders. Many terms overlap, so the two documents should be consistent with each other.
