The most confused pair of words in fundraising, and the arithmetic that decides what you own afterwards.
12 min read · Level 3
Founders optimise hard for the highest valuation and then discover it is a bar they must clear rather than a prize they won. A price you cannot grow into makes the next round harder, and if you miss it you face a down round with anti-dilution provisions that hurt far more than a lower number would have. A slightly cheaper round with a great investor and clean terms is the better deal almost every time.
Pre-money is the agreed value of the company before the new money arrives.
Post-money = pre-money + the amount raised.
Ownership is always calculated on post-money:
Investor % = Amount invested ÷ Post-money valuation
That one line resolves most first-round confusion.
Because '$5M valuation' means two different deals depending on which one is meant, and the difference is real money.
Raising $1M at $5M pre → post is $6M → investor owns 16.7%. Raising $1M at $5M post → investor owns 20%.
Same headline number, 3.3% of your company different. Always ask which.
You own 100%. You raise $1,000,000 at a $4,000,000 pre-money.
Your 80% of a $5M company is notionally worth $4M — the same as your 100% was worth before. You did not lose value; you exchanged 20% for $1M of cash and, hopefully, the growth it buys.
Now add an option pool. The investor asks for a 10% pool created pre-money. That pool comes out of the existing shareholders — you. So you end at roughly 70%, not 80%, and the investor still has 20%.
That is the 'option pool shuffle', it is standard, and it is negotiable. Knowing it exists is most of the battle.
First-time founders often optimise hard for the highest possible valuation. A valuation you cannot grow into makes the next round much harder — you must roughly triple the business to justify a higher price, and if you cannot, you face a down round, which is painful and can trigger anti-dilution provisions that hurt you badly.
A slightly lower valuation with a great investor and clean terms beats a high number with bad terms almost every time.
The second mistake: not asking whether the option pool is pre- or post-money. It is worth several percent of your company.
'Is that pre or post?' It is a normal, professional question and the answer changes your ownership.
Amount ÷ post-money. Do the arithmetic yourself before the meeting, not afterwards.
A pre-money pool dilutes only the existing shareholders. Ask, and negotiate — it is one of the most commonly conceded terms.
Today's decision compounds. Founders are routinely surprised at Series B by arithmetic that was fully visible at seed.
Liquidation preference, board composition and anti-dilution can matter more than valuation. Price is the number you brag about; terms are the number you live with.
The moment a number is mentioned, and before signing anything.
Do not agonise over valuation on a small SAFE from an angel who is helping you. The relationship and speed are worth more than a point of dilution at that size.
Investors typically require the new option pool to be created pre-money, which means it dilutes the existing shareholders and not the incoming investor. It is standard, it is rarely explained, and it is worth several percent of the company — and it is negotiable if raised before terms are agreed.
Ask where the pool sits before agreeing the valuation. The two numbers are one decision and are usually presented as separate.
"A five million valuation" describes two materially different deals. Raising one million at five pre means the investor takes 16.7%; at five post it is 20%. Founders nod through the ambiguity in the meeting and do the arithmetic afterwards.
Confirm pre or post out loud, in the room. It is a normal clarifying question and it is worth several percent.
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