Burn Multiple

Quick Definition

A capital efficiency metric showing how much cash is burned to generate each dollar of new annual recurring revenue.

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 — 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

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.