SaaS Magic Number Calculator: Sales & Marketing Efficiency for 2026
Calculate your SaaS Magic Number to see how efficiently your sales and marketing spend is converting into new annualized revenue.
How the SaaS Magic Number Is Calculated
The Magic Number annualizes your quarter-over-quarter revenue growth and divides it by the prior quarter's sales and marketing spend, showing how much new revenue each S&M dollar produced.
The formula uses the PRIOR quarter's S&M spend (not the current quarter's) to account for the typical lag between spending on sales/marketing and seeing revenue land. A Magic Number of 0.75+ is the threshold most investors look for; 1.0+ means that quarter's S&M spend pays for itself in new revenue within about a year.
How to Use the SaaS Magic Number Calculator
Enter Current Quarter Revenue
Total GAAP revenue or ARR for the most recently completed quarter.
Enter Prior Quarter Revenue
Total revenue or ARR for the quarter immediately before the current one.
Enter Prior Quarter S&M Spend
All sales and marketing costs from the PRIOR quarter — the spend that is presumed to have driven this quarter's growth.
Review your efficiency score
See your Magic Number and where it falls on the investor efficiency scale, from inefficient to excellent.
Real-World Scenario Example
"A B2B SaaS company grew quarterly revenue from $1,000,000 to $1,250,000 after spending $750,000 on sales and marketing the prior quarter."
Inputs
Result
Annualized Revenue Change = $1,000,000, Magic Number = 1.33 — strong sales efficiency, comfortably above the 1.0 threshold.
Important Disclaimer
This calculator provides a directional efficiency estimate only. The Magic Number can be distorted by large one-time deals, seasonality, or delayed sales-cycle effects, and should be tracked as a multi-quarter trend rather than a single-period snapshot.
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