Startup valuation methods — pre/post-money, VC method, comparables.
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Startup valuation methods — pre/post-money, VC method, comparables.
The fundamental equation of venture financing:
Post-Money Valuation = Pre-Money Valuation + Investment Amount
Investor Ownership % = Investment Amount / Post-Money Valuation
Developed by William Sahlman at HBS. Works backward from the expected exit to determine the required ownership today.
Steps:
Example:
Investment: $5M
Expected exit value: $200M (5 years, revenue multiple)
Target return: 10x (so need $50M at exit)
Required exit ownership: $50M / $200M = 25%
Expected dilution: Two more rounds, 20% each → retention = (1-0.20)^2 = 64%
Required ownership today: 25% / 64% = 39.1%
Post-money: $5M / 39.1% = $12.8M
Pre-money: $12.8M - $5M = $7.8M
Adapting public market comparables for private startups:
For SaaS and recurring-revenue businesses:
Pre-revenue valuation framework assigning up to $500K for each of five risk-reducing factors:
Factor Value (up to)
Sound idea (basic value) $500K
Prototype (technology risk reduced) $500K
Quality management team $500K
Strategic relationships $500K
Product rollout / early sales $500K
Maximum pre-money: $2.5M
Best suited for very early stage (pre-seed, seed). Provides a structured framework for what is inherently a qualitative judgment.
Adjusts a base valuation by scoring twelve risk factors:
Each factor scored: -- (-$500K), - (-$250K), 0 (neutral), + (+$250K), ++ (+$500K)
Start with the average pre-money valuation for similar stage/sector companies in the region, then adjust.
Valuation increases are tied to the achievement of specific milestones:
Each milestone reduces execution risk and justifies a step-up in valuation. Tranched investment structures tie funding releases to milestone achievement.
Company: [Name] Stage: Series A Date: [Date]
Exit Assumptions:
Exit year: Year 5
Projected revenue at exit: $80M
Exit multiple (EV/Revenue): 6.0x (median of comparable exits)
Terminal value: $480M
Investment & Return:
Investment amount: $8M
Target return multiple: 8x
Required proceeds: $64M
Required exit ownership: $64M / $480M = 13.3%
Dilution Adjustment:
Expected future rounds: Series B ($20M at $100M post), Series C ($40M at $350M post)
Cumulative dilution: ~30%
Retention ratio: 70%
Required ownership today: 13.3% / 70% = 19.0%
Implied Valuation:
Post-money: $8M / 19.0% = $42.1M
Pre-money: $42.1M - $8M = $34.1M
Sensitivity:
Exit Multiple 5.0x 6.0x 8.0x 10.0x
Pre-money ($M) 23.3 34.1 55.7 77.3
Company | Stage | Date | Round Size | Pre-Money | Rev Run-Rate | EV/Rev | Growth
--------------|---------|---------|-----------|-----------|-------------|--------|-------
Comp A | Series A| Q2 2025 | $10M | $35M | $4M | 8.8x | 120%
Comp B | Series A| Q1 2025 | $12M | $48M | $8M | 6.0x | 80%
Comp C | Series A| Q4 2024 | $7M | $25M | $3M | 8.3x | 150%
Comp D | Series A| Q3 2024 | $15M | $55M | $10M | 5.5x | 60%
Median EV/Revenue: 7.2x
Subject Revenue: $5M (ARR), Growth: 100%
Indicated valuation: $5M * 7.2x = $36M (pre-money)
Growth adjustment: Subject above median growth → justified premium of ~10-15%
Adjusted range: $36M - $41M pre-money
Method | Pre-Money ($M) | Weight | Weighted ($M)
------------------------|----------------|--------|---------------
VC Method | $34.1 | 40% | $13.6
Comparable Transactions | $38.0 | 35% | $13.3
Revenue Multiple | $36.0 | 25% | $9.0
| | |
Blended Pre-Money: | | | $35.9M
Recommended range: $33M - $38M pre-money
Central estimate: $36M