Post-money valuation equals the pre-money valuation plus the total new investment. It represents the company's implied total worth the moment the funding round closes and is the number used to calculate each shareholder's ownership percentage.
The formula
- Post-money valuation = Pre-money valuation + New investment
- Investor ownership = Investment amount ÷ Post-money valuation
If a startup raises $3 million on a $12 million pre-money valuation, the post-money valuation is $15 million, and the new investors own 20% of the company.
Why post-money matters more than you think
Many founders focus on pre-money, but post-money is what determines real ownership stakes. When a SAFE note specifies a post-money valuation cap — as most Y Combinator SAFEs do — the dilution math changes significantly compared to a pre-money cap:
- With a $10M post-money cap and a $1M SAFE, the investor is guaranteed at least 10% ownership at conversion, regardless of how many other SAFEs are issued
- With a pre-money cap, additional SAFEs dilute existing investors and founders proportionally, making ownership less predictable
2026 benchmarks
Median post-money valuations currently observed across US venture rounds:
- Pre-seed: $6–9M
- Seed: $12–20M
- Series A: $40–80M
- Series B: $100–250M
Practical implications
Post-money valuation sets the bar for your next round. If you raise at a $20M post-money seed, you generally need to demonstrate enough progress to justify at least a $40–60M pre-money at Series A — roughly a 2–3x step-up. Failing to reach that threshold forces a flat or down round, triggering anti-dilution protections and signaling distress to the market.