Fifty50 · free split calculator

How should you split equity with your co-founder?

Enter what each partner puts in — cash and time. Fifty50 runs it through the same scoring model your split is certified with by default — so the split you preview is the split you can prove. Then make it real: Fifty50 tracks your living split and cryptographically signs it. No sign-up, nothing saved.

Partners

Contributions

Your provisional split

Make it real

Turn this into a certificate you can prove.

A number in a calculator convinces no one. Fifty50 signs your split with a tamper-evident, registry-anchored certificate your co-founder, lawyer, or investor can verify — no account needed to check it. Tracking is free to start.

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How the math works

First each partner's contribution is valued in market dollars — cash at face value plus time at a fair mid-market rate for the role. Fifty50's scoring model then turns the inputs into the split, so a partner's % can differ from their dollar share and depends on how contributions are logged. This is the model your split is certified with by default, so the preview matches your signed certificate. Inside the product your certificate reflects your partnership's own agreed, living split. This calculator takes hours and cash only; ideas, intros and assets are logged in the full product. Unverified time and cash entries count up to $250,000 per partner in total until a co-founder confirms or co-signs them.

Engineering / code$120/hr
Fundraising$130/hr
CEO / key decisions$140/hr
Product$110/hr
Research$110/hr
Design$100/hr
Sales / bizdev$95/hr
Marketing$90/hr
Operations$85/hr
Cash only (no hours)face value
FREDERICK & SONS · Fifty50 — split equity fairly, prove it.  This calculator is software for decision support, not legal, tax, or securities advice.