Fundraising
Pre-Money vs Post-Money Valuation
Pre-money valuation is what a company is worth before new investment. Post-money valuation is the pre-money value plus the new money raised.
Also known as: pre-money valuation, post-money valuation
Why it matters
The pre vs post distinction quietly decides how much of your company you give away. Investors often quote a number without saying which one they mean, and the difference is real ownership. The investor stake is their check divided by the post-money valuation, so getting this wrong in a negotiation can cost a founder several percentage points of the company.
Formula
Post-money valuation = pre-money valuation + new investment. Investor ownership percent = investment / post-money valuation.
Worked example
A $2M pre-money and a $500K investment gives a $2.5M post-money. The investor owns 500,000 / 2,500,000 = 20 percent.
Common mistakes
- Agreeing to a valuation without clarifying whether it is pre- or post-money.
- Forgetting that a larger option pool added pre-money dilutes founders, not investors.
- Focusing on the headline valuation while ignoring the resulting ownership math.
Frequently asked questions
What is the difference between pre-money and post-money valuation?
Pre-money is the company's value before new investment. Post-money is pre-money plus the money raised. The difference determines how much ownership the investor gets.
How do you calculate post-money valuation?
Add the new investment to the pre-money valuation. A $2M pre-money plus a $500K raise equals a $2.5M post-money. The investor then owns their check divided by the post-money.
How does pre versus post-money affect ownership?
Investor ownership equals investment divided by post-money valuation. On a $2.5M post-money, a $500K check is 20 percent. Quoting the same number as pre- versus post-money changes who owns what.
Why does the pre/post distinction matter in negotiation?
Because investors sometimes state a valuation without specifying which one, and the gap is real equity. Always clarify. Mixing them up can cost you several percentage points of the company.
Does the option pool affect valuation?
Yes. Investors often require an option pool created before the round, inside the pre-money, which dilutes founders rather than investors. It effectively lowers the true pre-money value you receive. Negotiate the size carefully.
Which is higher, pre-money or post-money?
Post-money is always higher, because it includes the new investment. Pre-money plus the raise equals post-money. Knowing which one is quoted is essential to understanding the deal.
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Last updated 2026-06-02 · Back to the glossary