How to split equity with cofounders to maximise long-term motivation

Executive overview

Most founders treat equity splits as a negotiation. They shouldn't. The split's purpose is to maximise cofounder motivation over the years it takes to build something significant.

Four-year vesting with a one-year cliff is your safety net — it removes the risk of being generous. Use that hedge, then err toward generosity.

The equity split should make cofounders feel like true owners, not employees — that's what drives nights, weekends, and commitment when things are hard.

The right framing for equity splits

• Negotiate for motivation, not for leverage
• Cofounders often underestimate the time commitment required — account for that on their behalf
• A split that feels fair today must still feel fair three years in when the startup is hard
• Equal splits are a reasonable default when all else is equal, not a rule

How vesting protects you

• Four-year vesting means equity is earned over four years of work, not granted upfront
• One-year cliff means anyone who leaves or is fired in year one gets nothing
• Correcting a bad cofounder choice within the first year leaves no lasting harm to the cap table
• Vesting is the reason you can afford to be generous

What the equity should do

• Replace daily motivation management — the stake itself should drive behaviour
• Motivate late nights, weekends, recruiting, and long-term commitment
• Make cofounders feel like owners with real skin in the game
• If you don't think a cofounder deserves a generous grant, reconsider whether they should be a cofounder at all