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Free founder agreement tool

Split equity based on contribution, commitment and future responsibility.

Score each founder across time, capital, execution, expertise, network and risk. Compare the weighted recommendation with an equal split before documenting ownership.

Weighted contribution model Equal-split comparison Vesting guidance
This is a discussion model, not a legal allocation. Founder equity should be documented with clear roles, vesting, IP assignment, transfer restrictions and exit provisions.
Founder equity split calculator

Model co-founder ownership fairly

Live ownership model
FounderTimeCashExecutionExpertiseNetworkRisk
Recommended founder ownership After reserving the ESOP pool
Protection: Founder shares should usually vest and be subject to IP and exit obligations. All calculations run locally

A fair founder split should reflect future work, not only who suggested the idea first.

Founder ownership influences control, motivation, fundraising and long-term alignment. A useful discussion considers expected time commitment, capital at risk, execution responsibility, specialist expertise, commercial access and personal opportunity cost. Vesting protects the company when a founder leaves before earning the full allocation.

Commitment

Time and execution

Give meaningful weight to who will build, sell and operate the company over time.

Capital

Cash and personal risk

Recognise money invested, salary sacrificed, guarantees and other founder-level risk.

Capability

Expertise and access

Consider domain knowledge, technology, customer access, reputation and strategic relationships.

Protection

Founder vesting

Connect equity to continued contribution through vesting, cliffs and leaver provisions.

Frequently asked questions

Equal ownership can work when contributions, risk, responsibility and commitment are genuinely similar. Otherwise, a documented weighted split may be more durable.

Under a one-year cliff, a founder normally earns no vested shares until completing the first twelve months. The first tranche then vests, followed by periodic vesting.

It is useful to reserve a realistic employee pool early so founders understand their expected ownership on a fully diluted basis.

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