Founder Equity Split Calculator

This reflects a common (though not universal) view among startup advisors that sustained time commitment and financial risk tend to matter more to a venture's actual survival and growth than the value of the original idea alone, since ideas are relatively easy to have but hard to execute, while consistent effort and capital at risk over years are what actually build the company. Founders who feel their specific situation warrants weighting the idea or IP contribution more heavily should treat these percentages as a starting framework to adjust, not a fixed rule.

The calculator produces an exact 50/50 equity split, since each founder's share within every category is calculated relative to the two founders' combined total in that category, and identical inputs mean each founder accounts for exactly half of every combined total regardless of what the absolute numbers actually are. This confirms the calculator measures relative contribution between the two founders, not any absolute threshold either one has to clear.

No — company valuation only converts the calculated equity percentages into dollar figures for each founder; it has zero effect on the underlying percentage split itself, which is determined entirely by the relative contribution, hours, and investment scores entered for each founder. A founder curious how a higher future valuation might look can freely adjust that single number without disturbing the equity percentages already calculated.

No — this produces a reasonable, objective starting point for a conversation between founders based on one particular weighting framework, not a legal standard or formula any court, investor, or industry body requires. A real equity split should be documented in a formal founders' agreement drafted or reviewed by an attorney, and should account for factors this simplified model doesn't capture, like vesting schedules, what happens if a founder leaves early, and future dilution from investors.