What dilution actually costs a founder

If a company raises two million dollars at an eight million pre-money valuation, the post-money valuation is ten million and the new investor owns twenty percent. A founder who held one hundred percent now holds eighty. Raise again at higher numbers and the same reduction applies to what is left, not to the original figure — this is why ownership falls quickly at first and then more slowly.

A typical path through seed, Series A, Series B, and Series C leaves a founding team holding somewhere between ten and twenty-five percent at IPO. Those percentages sound brutal until you multiply them against the valuation they bought.

Term sheets routinely require an employee option pool to be created or topped up before the round closes. When the pool is created pre-money, existing shareholders absorb all of it, and the effective valuation is lower than the headline number suggests.

A ten million pre-money with a fifteen percent pool carved out beforehand is not a ten million valuation. It is closer to eight and a half. This single clause moves more founder equity than most of the terms that get argued about loudly, and it is often accepted without comment because it is framed as a formality.

Early money frequently arrives as a convertible note or a SAFE rather than priced equity. These instruments postpone the valuation argument to the next round, but they carry a cap — a maximum valuation at which the money converts. If the next round prices far above the cap, the early investor converts at the cap and takes a larger share than the headline suggests.

The practical consequence is that a founder can raise several uncapped-feeling instruments, close a strong priced round, and only then discover how much of the company was already committed. Modelling conversion before signing is unglamorous work that changes outcomes.

Never raising means never diluting. A founder who reaches a hundred million dollar valuation owning the whole company has done better than one who reaches four hundred million owning fifteen percent. The trade is speed: without outside capital you can only spend what you have earned, which usually means growing slower in a market where a funded competitor is buying customers faster than you can win them.

Garage to IPO supports both paths deliberately. You can reach a public listing without ever taking a term sheet, and the endgame score rewards retained ownership rather than raw valuation — so the bootstrapped run is frequently the higher-scoring one, when it survives.