What is Equity Dilution?

Equity dilution is what happens to your slice of ownership when a company creates and hands out new shares. Your number of shares stays the same, but because the total pie grew, the percentage you own shrinks. Raise money and you'll almost always be diluted.

Dilution isn't necessarily bad. Owning a smaller slice of a much larger company can be worth far more than owning all of a tiny one. The key is whether the money you raised grows the company's value by more than the ownership you gave up.

How dilution happens

Each funding round issues new shares to investors, diluting existing owners. Setting aside shares for an employee option pool dilutes everyone too. Over several rounds, founders' ownership steadily declines even as the company's value rises.

• Selling 20% in a round means everyone existing now owns 20% less of the whole.
• Option pools for employees are another common source of dilution.
• A smaller percentage of a bigger company can be worth much more in dollars.
• Track ownership across rounds on your cap table.

Why dilution matters for validation

Understanding dilution helps you decide how much money to raise and when. Raising too early — before you've validated the idea and increased the company's value — means giving away more ownership for the same dollars. Validating cheaply first, often by bootstrapping, lets you raise later at a higher valuation and keep more of what you build.