Tool · Framework + software + handbook

Slicing Pie: Dynamic Equity Split Model & Calculator

Mike Moyer · slicingpie.com Freemium Advanced

The canonical dynamic-equity framework for fairly splitting ownership based on real contributions before funding, when nobody yet knows who'll do what. A strong mental model even if you convert to fixed equity later.

  • Allocate equity by actual contributions (time, money, ideas, relationships), not day-one guesses
  • Prevents the classic trap of permanent decisions made on temporary information
  • Best used pre-funding, then converted to fixed equity plus vesting at incorporation
Open on slicingpie.com ↗

It answers 5 questions

  1. How should co-founders split equity fairly?
  2. What is vesting and why do I need a vesting schedule?
  3. Should I use a dynamic equity split like Slicing Pie instead of fixed percentages?
  4. What equity should I offer a technical co-founder vs. an early engineer?
  5. What happens to equity if a co-founder leaves early?

Read with it

  1. A practical India-specific walkthrough of equity split, vesting, and IP clauses in a co-founder agreement, from a mainstream... vakilsearch.com Article · Long read Co-Founder Agreement India 2026: Equity, Vesting & IP Guide Vakilsearch
  2. The definitive, data-driven book on early founding-team decisions, drawing on quantitative research covering nearly 10,000... Princeton University Press Book · ~480 pages The Founder's Dilemmas Noam Wasserman
  3. A detailed, clause-by-clause drafting guide with Indian legal context, including enforceability and state-wise stamp duty, that... lawsikho.com Article · Long read Co-Founder Agreements in India 2026: A Comprehensive Drafting Guide LawSikho
  4. Altman's condensed operating manual for founders, including sharp guidance on focus, spending your time on what only you can... playbook.samaltman.com Article · long Startup Playbook Sam Altman
  5. This is the essay to read first, from a YC partner who co-founded Justin.tv/Twitch and has done equal splits across his own... Y Combinator Essay · ~8 minute read How to Split Equity Among Co-Founders Michael Seibel
  6. A free, no-signup calculator that forces you and your co-founder to actually weigh the inputs (idea, roles, who is full time,... Foundrs Tool · ~10 minutes to work through Foundrs Co-Founder Equity Calculator Foundrs
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