Fifty50 · free split calculator

How should you split equity with your co-founder?

Enter what each partner puts in — cash and time. You'll get a fair, contribution-based split in seconds: cash at face value, time at fair market rates. 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

Each partner's share is proportional to the market-dollar value they put in: cash at face value plus time at a fair mid-market rate for the role. It's one of the contribution models Fifty50 supports — a clear, defensible starting point; inside the product your signed certificate reflects your partnership's own agreed, living split. Subjective contributions — ideas, intros, assets — enter the split only once another partner vouches for them, so no one can inflate their own slice; that co-sign step lives in the full product. A single unverified item above $250,000 counts up to that line until it's co-signed.

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.