Founder Equity and Vesting

When co-founders start out, splitting equity feels like a friendly formality. Months later, if someone leaves, it can become the single most contentious issue in the company. Two ideas do most of the work in preventing that: a thoughtful split, and vesting that ties ownership to staying and contributing.

Splitting the pie

There's no formula, but a few principles keep splits fair and durable:

• Base it on future contribution and commitment, not just who had the idea
• An even-ish split can work — but only if it reflects real, comparable input
• Write it down properly; a handshake split is a future dispute waiting to happen
• Leave room for a team option pool if you plan to hire and grant equity

Why vesting protects everyone

Vesting means you earn your shares over time rather than owning them all instantly:

• A schedule — equity vests gradually, often over several years
• A cliff — an initial period before any shares vest at all
• Leaver terms — what happens to unvested shares if a founder departs early
• Fairness both ways — it protects those who stay and rewards real commitment

Put it in writing early

The best time to agree on equity and vesting is before there's anything to fight over, while everyone is optimistic and aligned. Because the tax and legal mechanics vary by structure and jurisdiction, this is an area where getting the documents right early saves a great deal of pain later.