What is Burn Multiple?
Burn Multiple measures how much cash you burn to generate each dollar of new ARR. It's calculated by dividing net burn by net new ARR. A burn multiple of 2x means you spend $2 to create $1 of new annual recurring revenue.
David Sacks popularized this metric as a way to assess capital efficiency in growth-stage startups. It cuts through the complexity of multiple metrics to ask one simple question: how efficiently are you converting cash into growth?
Why Burn Multiple Matters
In capital-constrained environments, burn multiple separates efficient operators from cash incinerators. Two companies with identical growth rates can have vastly different burn multiples, revealing which one is building a sustainable business.
Investors increasingly focus on burn multiple alongside growth rate. The best companies achieve high growth with low burn multiple.
How to Calculate Burn Multiple Step by Step
Step 1: Calculate your Net Burn for the period. Use a trailing 12-month or quarterly window. Net Burn = total cash spent minus total revenue collected. Pull this from your bank statements, not your P&L (you want cash-basis numbers).
- Total cash out (last 12 months): $1,800,000
- Total revenue collected: $600,000
- Net Burn = $1,200,000
Step 2: Calculate your Net New ARR for the same period. Net New ARR = (Current ARR) minus (ARR 12 months ago). Make sure to use the same time window as your burn calculation.
- Current ARR: $900,000
- ARR 12 months ago: $350,000
- Net New ARR = $550,000
Step 3: Divide Net Burn by Net New ARR.
- Burn Multiple = $1,200,000 ÷ $550,000 = 2.2x
You're spending $2.20 to generate each dollar of new ARR. That's in the "mediocre" range, and there's room to improve efficiency.
Step 4: Track the trend. A single snapshot is less useful than the trajectory. Calculate burn multiple quarterly and chart it over time. A declining burn multiple (3x → 2x → 1.5x) signals improving efficiency even if the absolute number isn't great yet.
Step 5: Benchmark by stage. Early-stage companies naturally have higher burn multiples because of upfront investment. What matters is the trend toward efficiency as you scale.
Common mistakes founders make:
- Using gross burn instead of net burn (overstates the ratio)
- Comparing quarterly burn against annual Net New ARR (mismatched time windows)
- Ignoring one-time costs that inflate burn temporarily (office buildout, conference sponsorships)
- Not separating S&M burn from R&D burn. Investors want to know where the cash is going
Skip the spreadsheet. Futureproof tracks burn multiple automatically by connecting your bank data to your subscription metrics, so you always have a real-time view of capital efficiency.
Burn Multiple Benchmarks
Below 1x: Amazing. You're generating more ARR than you're burning. 1-1.5x: Great. Efficient growth. 1.5-2x: Good. Acceptable efficiency. 2-3x: Mediocre. Room for improvement. Above 3x: Concerning. Inefficient growth.
Formula
Burn Multiple = Net Burn ÷ Net New ARR
Lower is better. Shows how efficiently you convert cash into growth.
Example
Annual metrics:
- Net burn: $2,000,000
- Net new ARR: $1,500,000
Burn Multiple = $2M ÷ $1.5M = 1.3x
You're spending $1.30 to generate $1 of new ARR. That's efficient growth. Below 1x would be exceptional.
If burn multiple was 3x, you'd be spending $3 for every $1 of ARR, which is concerning.