Cofounder Agreement Checklist: What to Include Before You Sign

A cofounder agreement is not just paperwork.

It is the written version of the hard conversations most founders are tempted to skip.

When the partnership is new, writing things down can feel unnecessary. You trust each other. The idea is exciting. Nobody wants to make the relationship feel transactional. So the founders agree on a rough equity split, shake hands on roles, and assume the details can wait.

The problem is that details do not disappear. They wait.

They come back when one founder leaves a job later than expected, when the product direction changes, when one person wants to raise and the other wants to bootstrap, when a founder leaves early, or when nobody knows who actually gets the final call.

This checklist is for founders who already have a serious potential cofounder and are close to committing. Use it before you split equity, incorporate, announce the team, or sign anything that will be painful to unwind.

Why a cofounder agreement matters

A cofounder agreement defines the working relationship between founders: ownership, roles, responsibilities, decision rights, vesting, IP, departures, and dispute resolution.

It is different from a pitch deck, a cap table note, or a casual Notion page. It should make the partnership understandable before emotions, money, and company momentum make the conversation harder.

Penn Carey Law's founder agreement overview frames founders' agreements around core topics like ownership, confidentiality, decision-making, and dispute resolution. Yousign's founder agreement guide makes the same practical point: the agreement should cover equity, vesting, IP, decision-making, exits, and disputes before conflict appears.

That is the real value. Not legal ceremony. Clarity while the relationship is still calm.

When to create it

Create the agreement before the partnership becomes expensive to reverse.

Ideal moments:

• Before incorporation.
• Before splitting equity.
• Before applying to an accelerator as a team.
• Before quitting jobs or going full-time.
• Before assigning IP to the company.
• Before bringing in investors, employees, or public commitments.

If you already incorporated, do it as soon as possible. The agreement is easier to negotiate when both founders are still thinking about fairness, not defending their position after a conflict.

The cofounder agreement checklist

Use this checklist as a conversation map. If a topic feels uncomfortable, that is usually a sign it belongs in the agreement, not outside it.

1. Founder names and company basics

Start with the obvious details so there is no ambiguity.

Include:

• Legal names of each founder.
• Company name or working name.
• Company jurisdiction and entity type, if already decided.
• Effective date of the agreement.
• Whether the agreement applies before or after incorporation.

If the company does not legally exist yet, say what happens once it does. If the name, jurisdiction, or entity type is still changing, make sure the agreement can be updated cleanly.

2. Equity ownership

The agreement should state how much equity each founder is intended to receive.

Do not just write the percentages. Explain the assumptions behind them.

• Is the split equal or unequal?
• What contribution does the split reflect?
• Is anyone contributing cash, IP, customers, or prior work?
• Is anyone going full-time later?
• Is anyone taking salary earlier?
• Does the split assume a role that could change?

The goal is not to litigate every detail. The goal is to make sure the founders are not silently holding different stories about why the split is fair.

If you have not chosen the number yet, read our guide on how to split equity with a cofounder and use the cofounder equity calculator to make the assumptions visible.

3. Vesting schedule

Founder vesting is one of the most important parts of the agreement.

Without vesting, a founder who leaves early may keep a large ownership stake despite no longer contributing. That can hurt the remaining founder, future hires, and investor confidence.

Define:

• Vesting length.
• Cliff period.
• Start date.
• What happens before the cliff.
• What happens after partial vesting.
• Whether unvested shares can be repurchased.
• Whether any acceleration applies on acquisition or termination.

A common startup pattern is four-year vesting with a one-year cliff, but the right structure depends on jurisdiction, company type, timing, and founder history. The key principle is simple: equity should be earned through continued contribution.

4. Roles and responsibilities

Write down what each founder actually owns.

Titles are not enough. "CEO" and "CTO" can hide a lot of ambiguity.

Clarify ownership for:

• Product direction.
• Engineering and technical architecture.
• Sales and customer discovery.
• Fundraising and investor communication.
• Hiring and team management.
• Finance, legal coordination, and operations.
• Brand, marketing, and partnerships.

Also write down what each founder is not responsible for. Overlap is where many early conflicts begin. If both founders think they own product vision, that needs to be explicit. If nobody owns sales, that is a problem to solve now.

5. Decision rights

Decision rights are where cofounder agreements become operationally useful.

List which decisions require unanimous consent and which can be owned by a specific founder.

Decisions that often need special rules:

• Issuing new shares.
• Raising capital.
• Taking debt.
• Hiring or firing executives.
• Selling the company.
• Changing the product strategy.
• Entering major contracts.
• Spending above a defined threshold.
• Changing founder salaries.
• Removing a founder from an operating role.

Then define how deadlocks break.

If you split equity 50/50 and every major decision requires agreement, you need a deadlock process. That might be an advisor, board member, mediator, tie-breaker by domain, or staged escalation process. The exact mechanism matters less than having one before the deadlock happens.

6. Time commitment and availability

Many founder conflicts are really commitment conflicts.

Write down what each founder is committing in time, duration, and transition plan.

Cover:

• Full-time or part-time status.
• Expected weekly availability.
• Start date for full-time work.
• Outside employment or consulting.
• Side projects.
• Minimum commitment period.
• What happens if a founder cannot meet the commitment.

Be precise. "All in" is not a legal or operational term. One founder's "all in" might mean 80 hours and no salary. Another's might mean 45 focused hours while managing family obligations. Both can be valid. The mismatch is the problem.

7. Salary, expenses, and cash contributions

Money ambiguity gets ugly quickly.

Define:

• Whether founders take salary.
• When salary starts.
• Whether salaries are equal.
• Whether deferred salary accrues.
• How expenses are approved and reimbursed.
• Whether founder cash contributions are equity, loans, SAFEs, or something else.
• Who can approve spending.

Do not mix cash investment and founder labor without naming the difference. A founder putting in money is not the same as a founder earning equity through work. Both matter, but they should be documented separately.

8. Intellectual property assignment

The company needs to own the work that belongs to the company.

Define:

• What pre-existing IP each founder brings.
• What IP is assigned to the company.
• What remains personal or excluded.
• Who owns code, designs, content, research, customer lists, and inventions created after the agreement.
• Whether contributors, contractors, or advisors must sign IP assignment documents.

This matters because investors, acquirers, and future employees will want to know the company actually owns what it claims to own.

If one founder built a prototype before the agreement, document whether that prototype is being assigned to the company and under what terms.

9. Confidentiality and data handling

Founders see sensitive information early: customer data, investor conversations, product strategy, financials, hiring plans, and technical details.

The agreement should define:

• What counts as confidential information.
• How long confidentiality lasts.
• What can be shared with advisors, lawyers, investors, or contractors.
• How company data should be stored and accessed.
• What happens when a founder leaves.

This section should be practical. It is not only about secrecy. It is about preventing messy behavior when relationships change.

10. Founder departures

Every cofounder agreement should answer the uncomfortable question:

What happens if someone leaves?

Cover:

• Voluntary resignation.
• Termination for cause.
• Termination without cause.
• Long-term illness or inability to work.
• Reduction from full-time to part-time.
• Removal from an operating role.
• Death or incapacity.

Also define good leaver and bad leaver treatment if relevant in your jurisdiction. This is a legal topic, so do not improvise final language. But do not skip the business conversation either.

The goal is to avoid negotiating departure terms during the emotional peak of a departure.

11. Conflict and dispute resolution

You will disagree.

The question is whether the agreement gives you a way to resolve disagreement before it becomes personal.

Include:

• How founders should raise serious issues.
• Whether disputes go first to founder discussion, advisor, mediator, or board.
• How long each step can take.
• Which decisions can continue while a dispute is unresolved.
• Governing law and venue, to be validated by counsel.

This is where compatibility matters. A founder who wants immediate confrontation and a founder who needs time to process can both be reasonable. But if the agreement has no process, every conflict becomes a conflict about how to have conflict.

12. Non-compete, non-solicit, and outside activity

These clauses are highly jurisdiction-dependent and can be restricted or unenforceable in some places.

Still, founders should discuss the business intent:

• Can founders work on adjacent projects?
• Can they consult for customers, competitors, or investors?
• Can they recruit company employees after leaving?
• Can they use company relationships for another venture?
• What outside commitments need disclosure?

Do not copy generic language from a template. Get legal review here.

13. Amendment process

The first version of the agreement will not anticipate everything.

Define how changes are made:

• Who must approve amendments.
• Whether amendments must be written and signed.
• Whether investor documents override or modify parts of the founder agreement.
• When the agreement should be reviewed again.

A good review cadence is after major events: incorporation, funding, founder role changes, hiring executives, moving countries, or preparing for acquisition.

The compatibility section most agreements miss

Most founder agreement templates cover legal and operational terms.

That is necessary, but incomplete.

Before signing, founders should also document the relationship risks they already know about.

For example:

• One founder is more risk-seeking than the other.
• One founder wants faster decisions.
• One founder is more direct in conflict.
• One founder expects more work intensity.
• One founder wants venture scale while the other is unsure.

This does not need to become legal language. It can be a side letter, operating memo, or founder working agreement. The point is to avoid pretending the relationship has no known tension.

Take the CofounderFit assessment before you sign, then use the report to identify the 2-3 tension areas you should discuss before equity, roles, and decision rights become harder to change.

A simple pre-signing workflow

Before signing the cofounder agreement, run this sequence:

1. Complete the CofounderFit assessment separately.
2. Discuss the biggest compatibility risks.
3. Run a short cofounder trial project.
4. Decide the equity split using clear assumptions.
5. Define vesting, roles, decision rights, IP, and departure terms.
6. Start from the downloadable cofounder agreement template, or generate a more customized first draft with the cofounder agreement generator.
7. Review the draft with a qualified lawyer.
8. Sign only when both founders can explain the agreement in plain language.

If a founder refuses to discuss the agreement, that is not a legal issue first. It is a compatibility signal.

What not to do

Avoid these common mistakes:

• Splitting equity without vesting.
• Using a template without understanding it.
• Treating titles as role clarity.
• Ignoring decision rights because "we trust each other."
• Mixing cash contributions and sweat equity without documentation.
• Leaving IP ownership vague.
• Assuming a founder departure will be handled kindly later.
• Signing before discussing known compatibility concerns.

Trust is good. Structure protects trust.

Final checklist

Before you sign, confirm that your cofounder agreement covers:

• Founder names and company details.
• Equity ownership.
• Vesting schedule.
• Roles and responsibilities.
• Decision rights and deadlock process.
• Time commitment.
• Salary, expenses, and cash contributions.
• IP assignment.
• Confidentiality.
• Founder departures.
• Conflict resolution.
• Outside activities.
• Amendment process.
• Known compatibility risks.

If you cannot discuss one of these topics now, you are not making the topic disappear. You are moving it into the future, where it will be more expensive.

Use the agreement as a forcing function for clarity.

Download the cofounder agreement template, generate a tailored version with the cofounder agreement generator, then test your cofounder compatibility before you sign.

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Sources and further reading: Penn Carey Law founders' agreement overview, Y Combinator's questions to discuss with a potential cofounder, Founders Journey on founders' agreement terms, and Yousign's founder agreement guide.