Should cofounders split equity equally?

Updated Oct 1, 2026

Short answer: Often, yes — if founders start together with the same commitment, an equal split avoids resentment and is a sound default. Split unequally when contributions clearly differ, such as one founder being part-time or having already built much of the company.

The case for equal

Most of a startup's value is created after day one, so small differences in who had the idea rarely matter years later. An equal split also signals that founders see each other as true partners, which investors notice.

The case for unequal

Weighted splits make sense when one founder brings substantially more: full-time versus part-time, significant capital, an existing product or customers, or a role the company can't succeed without. Agree the reasons explicitly so the split feels considered.

Avoid deadlock

With an even two-way split, agree in writing how disagreements are resolved — for example, who has the final say in each area — in your cofounder agreement.

Equity split calculator →Guide: How to split equity with a cofounder →

General information, not legal, tax or investment advice.