What is SaaS Magic Number?
The SaaS Magic Number measures sales efficiency — how much new ARR is generated for every dollar spent on sales and marketing.
The SaaS Magic Number measures sales efficiency — how much new ARR is generated for every dollar spent on sales and marketing. It answers the question: "Is our sales investment paying off?"
Magic Number = (Current Quarter ARR - Previous Quarter ARR) ÷ Previous Quarter S&M Spend
Interpretation: below 0.5 means sales spend is inefficient (tighten spend). 0.5-0.75 is acceptable but room for improvement. 0.75-1.0 is good. Above 1.0 is excellent (invest more aggressively).
The Magic Number is a lagging indicator — it reflects the efficiency of sales spend from the previous period. It works best for B2B SaaS with sales-led motions and should be combined with CAC payback period for a complete picture.
Why It Matters
The Magic Number tells you whether to invest more in sales (>1.0) or pull back (<0.5). It's one of the clearest signals board members and investors use to evaluate go-to-market efficiency.
Frequently Asked Questions
What is the SaaS Magic Number?
Net new ARR divided by previous quarter sales and marketing spend. It measures how efficiently sales spending converts to new revenue.
What is a good Magic Number?
Below 0.5 = pull back on spend. 0.5-0.75 = optimize. 0.75-1.0 = good. Above 1.0 = invest more aggressively.
Related Terms
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