Metrics & Performance
Magic Number
Last updated
Quick Answer
A SaaS efficiency metric measuring how much ARR growth is generated per dollar of sales and marketing spend — above 0.75 is generally considered efficient.
SaaS Magic Number
Magic Number = Net New ARR (Q) / S&M Spend (Q-1)
Where
- Net New ARR
- = New ARR added this quarter
- S&M Spend
- = Sales & marketing spend from the prior quarter
The Magic Number formula: (Current Quarter ARR - Prior Quarter ARR) x 4 / Prior Quarter S&M Spend.
A score above 1.0 means the company generates more than $1 of annualized revenue for every $1 spent on sales and marketing — very efficient. Between 0.75-1.0 is good. Below 0.5 suggests the go-to-market motion is struggling or the market isn't responding well.
In Practice
If a SaaS company spent $1M on S&M in Q1 and ARR grew from $10M to $12.5M, the Magic Number is (($12.5M - $10M) x 4) / $1M = ($10M / $1M) = 10 — phenomenal. If ARR only grew $200K, the Magic Number is 0.8 — solid but not exceptional.
Why It Matters
The Magic Number is one of the clearest signals of go-to-market efficiency. Investors use it to evaluate whether increased S&M spend will drive proportional growth or whether the model is fundamentally broken.
Related Concepts
Further Reading
CAC: What Customer Acquisition Cost Means in Venture Capital
CAC (Customer Acquisition Cost) is the metric VCs use to assess go-to-market efficiency. Here's what it means, how to calculate it correctly, what good benchmarks look like, and how it interacts with LTV to determine business viability.
How to Run a Competitive Fundraising Process as a First-Time Founder
First-time founders who run structured, parallel fundraising processes close rounds faster and on better terms. Here's how to engineer competitive dynamics and create real investor urgency.
What Is Venture Capital and How Does It Work
A comprehensive guide to venture capital — how it works, who the players are, and why it matters for startups seeking growth capital in today's market.
Comparisons
Tools & Resources
Frequently Asked Questions
What is Magic Number in venture capital?
The Magic Number formula: (Current Quarter ARR - Prior Quarter ARR) x 4 / Prior Quarter S&M Spend. A score above 1.0 means the company generates more than $1 of annualized revenue for every $1 spent on sales and marketing — very efficient. Between 0.75-1.0 is good. Below 0.
Why is Magic Number important for startups?
Understanding Magic Number is critical for founders navigating the fundraising process. It directly impacts deal terms, valuation, and the relationship between founders and investors.
What category does Magic Number fall under in VC?
Magic Number falls under the metrics category in venture capital. This area covers concepts related to the quantitative measures used to evaluate fund and company performance.
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