What Is Pre-Money vs. Post-Money Valuation?
Pre-money valuation is what the company is worth before the new investment goes in. Post-money valuation is what the company is worth after the new investment goes in — equal to pre-money plus the investment amount.
The investor's ownership percentage is computed from the post-money number: investor ownership = investment / post-money valuation. So if an investor puts in €2M at a €10M post-money, they own 20%. If they put in €2M at a €10M pre-money, they own 16.67% (2 / 12).
Same investment amount, same headline "€10M" — and a difference of more than 3 percentage points of ownership. Over multiple rounds, this kind of inattention compounds into materially less founder ownership at exit.
How Pre-Money and Post-Money Math Works
The core formula: post-money = pre-money + investment.
The investor ownership: investor % = investment / post-money.
The founder dilution: existing shareholders are diluted by the same percentage the investor takes. If the investor takes 20%, every existing shareholder's percentage drops to 80% of what it was.
The price per share: price per share = pre-money valuation / total fully diluted shares outstanding BEFORE the round. The new investor's shares are computed by dividing their investment by this price.
The option pool wrinkle: if the term sheet says "10% option pool top-up included in the pre-money," the pool is created BEFORE the new money goes in, which dilutes the existing shareholders only. Your effective pre-money drops by the pool top-up amount. See [option pool shuffle](/captable/option-pool-shuffle) for the full mechanics.
Key Terms and Definitions
Pre-money valuation — what the company is worth before the new investment. The number that determines price-per-share and founder dilution.
Post-money valuation — what the company is worth after the new investment. Equal to pre-money + investment. The number that determines investor ownership percentage.
Price per share — pre-money valuation divided by fully diluted shares outstanding before the round. The number used to convert investment euros into share counts.
Effective pre-money — pre-money valuation minus any pool top-up applied pre-money. The number you actually capture as a founder, which is almost always lower than the headline pre-money.
Post-money SAFE — a SAFE where the cap refers to a post-money valuation. Materially more dilutive than the original pre-money SAFE because subsequent SAFEs do not dilute existing SAFE holders. See [convertible notes and SAFEs](/captable/convertible-notes-safes).
Fully diluted — the total share count used to compute price-per-share. Includes issued + reserved options + convertibles on as-converted basis. See [fully diluted capitalization](/captable/fully-diluted-capitalization).
Why Pre-Money vs. Post-Money Matters for Founders
The first reason is the language game investors play, often unconsciously. A VC says "we are thinking €10M valuation" and means post-money. The founder hears €10M and assumes pre-money. The gap is the entire investment amount — typically several percentage points of founder ownership.
Always anchor your conversations on post-money plus investment amount. "We are raising €2M; what post-money are you proposing?" eliminates the ambiguity. Never let a term sheet ship without "Pre-Money Valuation: €X" and "Post-Money Valuation: €Y" both written out as separate line items.
The second reason is the option pool shuffle. Almost every Series A term sheet will read "Pre-Money Valuation: €X, including a Y% option pool top-up." That phrasing means the pool is created BEFORE the investor's money goes in, diluting only the founders + existing shareholders. Your effective pre-money is meaningfully lower than the headline. The defence is a credible hiring plan that justifies a smaller pool. See [option pool shuffle](/captable/option-pool-shuffle).
The third reason is multi-instrument rounds. If you have outstanding SAFEs that convert at the same priced round as new investor money, the cap table math gets complicated. Use a tool that models all conversions simultaneously — back-of-envelope math on a stack of three SAFEs at different caps plus a new Series A almost always produces the wrong number.
Common Scenarios
Clean priced round, no SAFEs, no pool top-up: €2M at €8M pre / €10M post. Investor takes 20%, founders end at 80% of fully diluted. Easy math.
Same round with 10% pre-money pool top-up: founder ownership ends at ~64% instead of 80%. The 10% pool came entirely from founder dilution. Always negotiate pool size against a credible hiring plan.
Same round with €1M of outstanding SAFEs (€5M cap, 20% discount): SAFEs convert into ~200,000 shares at the cap price. New investor still pays the higher €1.60/share. Founders end below 50% combined, even before the next round. This is why SAFE stack management matters.
Bridge round at a flat pre-money: company raises €500K bridge at €8M post = €7.5M pre. Same valuation as last round, but founder dilution still happens (~6.25%). Bridges are dilutive even when they look like flat rounds. See [bridge rounds](/captable/bridge-rounds).
How CAPLINK Helps You Manage Valuation Math
CAPLINK's scenario engine takes your current cap table, your outstanding convertibles, your option pool, and a proposed round structure (investment amount, pre-money, pool top-up percentage, pool placement) and computes the full post-round cap table — including SAFE conversions at their individual caps, anti-dilution adjustments on prior preferred, and founder dilution per shareholder. So "what does this term sheet mean" is a 15-minute review, not a 3-day Excel rebuild.
The same engine lets you run multiple scenarios side-by-side: "Series A at €10M post with 10% pool pre-money" vs. "Series A at €12M post with 15% pool pre-money" — and shows you that the second offer might actually be worse for founder ownership despite the higher headline. This is exactly the analysis VCs run on their side; doing it on yours levels the negotiation.
See [option pool shuffle](/captable/option-pool-shuffle), [equity dilution](/captable/equity-dilution), [convertible notes and SAFEs](/captable/convertible-notes-safes), and [fully diluted capitalization](/captable/fully-diluted-capitalization) for the linked mechanics. Document the closing cap table and the term sheet in your [data room](/dataroom) for the next round's diligence.