Efficiency Score

What is Efficiency Score?

Efficiency score measures how much new ARR you generate for each dollar spent on sales and marketing. An efficiency of 0.8 means every $1 of S&M spend produces $0.80 of new ARR. Above 1.0 means you're generating more ARR than you're spending.

This metric is closely related to Magic Number but uses annual instead of quarterly figures.

Why Efficiency Score Matters

In growth-at-all-costs mode, efficiency takes a backseat. In capital-efficient or profitability-focused environments, efficiency determines whether growth is sustainable.

High efficiency means you can grow faster on less capital, extending runway and reducing dilution from fundraising.

How to Calculate Efficiency Score Step by Step

Step 1: Calculate your Net New ARR for the trailing 12 months. Current ARR minus ARR 12 months ago.

• Current ARR: $4,800,000
• ARR 12 months ago: $2,900,000
• Net New ARR = $1,900,000

Step 2: Total your S&M spend for the same 12-month period. Include salaries, commissions, ad spend, tools, events, content, every dollar spent to acquire and retain customers.

• Trailing 12-month S&M spend: $2,800,000

Step 3: Divide.

• Efficiency Score = $1,900,000 ÷ $2,800,000 = 0.68

For every $1 spent on sales and marketing, you generated $0.68 in new ARR. That's in the "good but not great" range.

Step 4: Compare to the Magic Number. Efficiency Score and Magic Number are similar but use different time windows. Magic Number uses quarterly data with a one-quarter lag. Efficiency Score typically uses annual data. Both measure S&M efficiency.

Step 5: Understand what drives your score.

• Score improving + ARR growth accelerating → You've found a scalable channel. Double down
• Score declining + ARR growth flat → You're spending more for the same result. Optimize
• Score high (>1.0) + ARR growth slow → You're underinvesting. Spend more

Common mistakes founders make:

• Using gross new ARR instead of net new ARR (ignores churn impact on efficiency)
• Not including all S&M costs (underweighting headcount costs)
• Comparing across companies at different scales (a $1M ARR company's efficiency score isn't comparable to a $50M ARR company's)
• Confusing efficiency score with burn multiple (burn multiple uses total burn, not just S&M)

Improving Efficiency

Improve conversion rates at each funnel stage. Increase deal sizes without proportionally increasing sales costs. Build organic acquisition through product virality and content. Reduce CAC through product-led growth motions.