Part of our SAFE & Early-Stage Financing Guide — Open the guide →
Post-money valuation is the value of a company immediately after a new round of financing closes — that is, after the new investment has been added to the cap table. It equals the pre-money valuation plus the total new investment in that round.
The formula structurally determines investor ownership: new investor ownership = new investment ÷ post-money valuation. A $5M investment at $25M post-money yields 20% ownership; the same $5M at $20M post-money yields 25%. This makes post-money the more transparent benchmark for what an investor actually owns coming out of the round, and it is the figure most commonly cited in financial reporting and benchmarking databases (PitchBook, Crunchbase).
Post-money is also the basis for option-pool calculations under “post-money option pool” structures, anti-dilution adjustments in subsequent rounds, and waterfall modeling at exit. A common founder negotiation point is whether option-pool expansion (typically required by incoming investors) is calculated on a pre-money or post-money basis — pre-money expansion dilutes existing holders before the round, post-money dilutes the new investor proportionally.
Vircon Legal advises founders, investors, and growth-stage companies on post-money valuation modeling, option-pool true-up mechanics, and the multi-round dilution implications of valuation negotiations across SAFE, convertible, and priced-round structures.
Post-money, pre-money and the percentage they decide
The post-money valuation is simply the pre-money valuation plus the new money invested. It matters because the investor’s ownership percentage is calculated against it: invest 2 on a post-money of 10 and you own 20%. The single most common confusion in early negotiations is conflating pre- and post-money, which can quietly shift several percentage points of ownership. The post-money figure also becomes the implicit starting point for the next round’s pricing conversation and for measuring whether a later round is “up” or “down.” Founders should always confirm which basis a term sheet uses, and model the resulting cap table before agreeing a number that sounds attractive in isolation.
Frequently Asked Questions
What is post-money valuation?
Post-money valuation is a company’s value immediately after a new investment — pre-money valuation plus the new capital raised.
What is the post-money formula?
Post-money = pre-money + new investment. Investor ownership = investment ÷ post-money.
Why is post-money important?
It sets each shareholder’s ownership percentage after the round and is the base for the next round’s dilution math.