SaaS Magic Number
A metric that measures sales and marketing efficiency by comparing current quarter revenue growth to previous quarter sales and marketing spend.
FORMULA
Magic Number = ((Current Qtr GAAP Rev - Previous Qtr GAAP Rev) × 4) / Previous Qtr S&M SpendWhy it matters
The Magic Number helps boards quickly assess whether a company should accelerate or brake its sales and marketing spend. Because it uses GAAP revenue and fully loaded S&M expense, it relies entirely on audited financials, making it harder to manipulate than internal CAC calculations. A Magic Number above 1.0 indicates highly efficient growth; the company should step on the gas and hire more reps. A number between 0.7 and 1.0 suggests acceptable efficiency, while a number below 0.7 means the go-to-market engine is broken and needs fixing before adding more fuel.
2025 BENCHMARK
SaaS Capital's 2025 review places the median SaaS Magic Number at 0.85 for private companies.
COMMON MISTAKES
- Using ARR instead of GAAP revenue, which distorts the calculation.
- Failing to annualize the revenue delta by multiplying by 4.
- Comparing current quarter revenue to current quarter S&M spend, ignoring the sales cycle lag.