Founders Agreement
What does a founders agreement cover?
A founders agreement governs the co-founder relationship: equity split, vesting schedules, IP ownership, roles and responsibilities, decision-making authority, and departure terms. Most institutional investors require a signed founders agreement with IP assignment clauses before Series A closes. The SBA recommends formalising founder agreements at incorporation, not as a post-fundraise afterthought.
What are the core clauses in a founders agreement?
| Clause | Why it matters |
|---|---|
| Equity split | Defines each founder's percentage based on contribution, not split equally by default |
| Vesting schedule | Protects against a co-founder leaving early with a large stake. Standard: 4-year, 1-year cliff. |
| IP assignment | All IP created for the company belongs to the company entity, not the individual founder |
| Decision-making | Specifies which decisions require unanimous consent vs majority founder vote |
| Departure terms | What happens to unvested and vested shares if a founder exits voluntarily, is removed, or dies |
| Non-compete / non-solicit | Restrictions on a departing founder competing or poaching employees for a defined period |
What happens when a startup has no founders agreement?
The three most common failure modes: a departing co-founder retaining unvested equity (cap table problem that investors will require resolution), an IP ownership dispute blocking Series A diligence (the company may not legally own its core product), and a founder deadlock on major decisions with no resolution mechanism (operating gridlock that paralyses growth decisions).
What provisions in a founders agreement protect against co-founder disputes?
The most protective provisions in a founders agreement are: (1) reverse vesting schedules that cause unvested shares to be repurchased if a co-founder departs, at the original issue price, (2) a drag along provision that allows the majority of founders to bind minority founders to an acquisition vote, (3) an explicit IP assignment clause ensuring all IP created by co-founders transfers to the company rather than remaining with the individual, and (4) a decision-making framework specifying which decisions require unanimous founder consent versus majority founder vote. Without these provisions, a co-founder who departs retains their full equity allocation, may argue that IP they developed belongs to them personally, and can block acquisitions that the remaining founders support.
What are the most common founders agreement disputes and how do they play out?
The most common disputes are: (1) vesting disputes when a co-founder is asked to leave and disagrees whether their departure was voluntary (voluntary departure forfeits unvested equity; involuntary termination without cause may partially accelerate it), (2) IP ownership disputes when a co-founder claims that code or inventions developed before the company was formally incorporated belong to them personally, and (3) equity split disputes when the founding equity was assigned informally without a written agreement and co-founders later disagree on what was agreed. All three of these disputes are almost entirely preventable by a well-drafted founders agreement signed at the time of incorporation. Investors conducting Series A diligence specifically check for founders agreements and will flag their absence as a material risk, because disputes between founders are one of the most common causes of early-stage company failure. The NVCA model documents do not include a founders agreement template, but most US startup law firms provide standard templates that cover all key provisions.
What do founders get wrong with founders agreements?
The most common mistake is not signing a founders agreement at incorporation. Many founding teams defer it because the conversation about equity splits, vesting, and decision-making authority is uncomfortable. By the time they are forced to address it (usually when an investor asks), the company is under time pressure and co-founders may have divergent views that are harder to resolve. The best time to sign a founders agreement is on the same day as incorporation, when all co-founders are aligned, motivated, and have no specific grievance to negotiate around.
A second error is not including an IP assignment and work-for-hire clause covering pre-incorporation work. If a co-founder wrote the core software before the company was incorporated, that IP belongs to the individual, not the company, unless an assignment agreement is signed. Most founding team IP assignment clauses only cover work done after incorporation. Founders should ensure the agreement explicitly covers IP created in the 12 months prior to incorporation as well.
Third: setting equity splits based on initial contributions rather than future commitments. A founding team that splits equity 60/40 based on the fact that one founder came up with the idea will often find this split feels unfair 18 months later when both co-founders have contributed equally for over a year. Equity splits should be based on expected future contribution (who will do what role, for how long, at what level) rather than who had the original idea, which has far less long-term value.
How it works in practice
Case example: Missing founders agreement surfaces in Series A diligence
A 3-person founding team built a fintech product over 18 months without a formal founders agreement. One founder contributed the original code but left 6 months before Series A. The remaining founders assumed the departed founder's equity had lapsed. It had not; there was no vesting schedule.
At Series A diligence, the investor's lawyer identified the departed founder as a 30% shareholder with no vesting, no IP assignment, and no non-compete. The company did not legally own all the code in its core product. Close was delayed 8 weeks while the departed founder was tracked down and negotiations were conducted to buy out 20% of their stake for $180K in cash.
The founders who signed a proper agreement at incorporation, with 4-year vesting, a cliff, and IP assignment, would have faced none of this. The departed founder would have had zero unvested equity and a clean IP assignment. Total cost of the founders agreement: $2,500 in legal fees at incorporation. Total cost of not having one: 8 weeks of delay and $180K.
Frequently asked questions
Is a founders agreement the same as a shareholders agreement?
No. A shareholders agreement governs all shareholders including investors and is signed after a priced round. A founders agreement covers only the founding team and is signed at incorporation or very early, before any outside investors join.
Can equity splits in a founders agreement be changed later?
Only with the consent of all parties and a formal cap table amendment. Getting the equity split right at founding is far easier than renegotiating after the company has traction and everyone has a stronger sense of the stakes involved.
Do founders need separate IP assignment agreements?
Yes. IP assignment is sometimes included in the founders agreement and sometimes in a separate IP assignment and invention disclosure agreement. Both should be signed at incorporation. Investors will check that all founders, early employees, and contractors have signed appropriate IP assignment documents.
What is reverse vesting for founders?
Reverse vesting means founders receive their full share allocation at incorporation but the company retains the right to buy back unvested shares at nominal value if the founder leaves before the vesting schedule completes. Economically it is equivalent to standard option vesting but is used for founders who receive shares rather than options.
When is it too late to sign a founders agreement?
It is never legally too late to sign a founders agreement, but it becomes practically very difficult once a disagreement has already surfaced. The optimal time is at incorporation before any work has been done, any equity has been issued, or any investor conversations have begun. The next best time is immediately after incorporation before the company gains material value. Once a company has raised external capital, amending equity arrangements requires investor consent and is significantly more complex.
Related glossary terms
- Option Pool, the equity reserve created from within the founders' collective ownership at each round
- Vesting Cliff, the founder vesting provision that should be included in every founders agreement
- Investor Rights Agreement, the investor-facing shareholder rights document that replaces or supplements the founders agreement at Series A
Explore related Fintera content
- Fractional CFO for Startups: The 2026 Playbook, how a fractional CFO identifies founders agreement gaps during Series A preparation
- When to Hire a CFO: 9 Signs It's Time, the fundraise signals that surface founders agreement gaps at the worst possible time
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