Pre-Money vs Post-Money Valuation Explained

One of the most important concepts in startup fundraising is the difference between pre-money and post-money valuation. Confusing these terms can lead to massive misunderstandings about ownership and dilution.

Pre-Money Valuation

Pre-money valuation is what your company is worth before the investment. It's the value of your company excluding the new capital being injected.

Post-Money Valuation

Post-money valuation is what your company is worth after the investment. It's calculated as: Pre-money valuation + Investment amount = Post-money valuation.

Why This Matters

Let's look at an example:

• You agree to a $5M investment
• You think you're agreeing to $10M pre-money (33% dilution)
• But the investor means $10M post-money (50% dilution)

That single misunderstanding just cost you 17% of your company—potentially millions of dollars at exit.

The Math

Investor ownership % = Investment Amount ÷ Post-Money Valuation

Example with $10M pre-money:

• $10M pre-money + $5M investment = $15M post-money
• Investor owns: $5M ÷ $15M = 33.3%

Example with $10M post-money:

• $10M post-money = $5M pre-money + $5M investment
• Investor owns: $5M ÷ $10M = 50%

Best Practices

• Always clarify: Explicitly state whether you're discussing pre or post
• Write it down: Get the valuation basis in writing immediately
• Model both: Use CapTableFree to see the impact of both scenarios
• Be precise: Use exact numbers, not round figures