SaaS Magic Number Calculator
Free magic number calculator. Net new ARR ÷ prior S&M spend. Shows SaaS growth efficiency.
How SaaS Magic Number Calculator Works
The SaaS Magic Number measures how efficiently a company converts sales and marketing spend into new recurring revenue. Calculated as Net New ARR ÷ Prior Quarter's S&M Spend, it's the go-to metric for investors and CFOs evaluating growth efficiency. A score above 0.75 signals healthy growth efficiency — below 0.5 suggests you're spending too much to acquire each dollar of ARR. Benchmark from OpenView Partners' 2023 SaaS Benchmarks report. Enter your values above to calculate instantly, no sign-up required.
Benchmarks & Interpretation
| Label | Meaning |
|---|---|
| Above 0.75 | Efficient growth — scale spend |
| 0.5 – 0.75 | Moderate — optimise before scaling |
| Below 0.5 | Caution — high CAC relative to ARR generated |
| Above 1.5 | Exceptional — seen in best-in-class SaaS |
Frequently Asked Questions
What is the SaaS magic number?
The SaaS Magic Number is a key performance indicator that measures how efficiently a company converts sales and marketing (S&M) spend into new Annual Recurring Revenue (ARR). It's calculated by dividing Net New ARR by the prior quarter's S&M spend. Investors and CFOs use it to evaluate whether a SaaS company is spending money wisely on growth.
What is a good SaaS magic number?
Industry benchmarks suggest: above 0.75 is excellent (efficient growth), 0.5–0.75 is moderate (room for optimization), and below 0.5 signals caution. A magic number above 1.5 is exceptional and found in best-in-class SaaS companies. The benchmark varies by company stage, market, and business model.
How do I calculate the SaaS magic number?
Magic Number = Net New ARR ÷ Prior Quarter's S&M Spend. Example: If your company generated $500k in Net New ARR last quarter and spent $400k on S&M the quarter before, your magic number is 1.25 — a strong signal of efficient growth.
What's the difference between magic number and CAC payback period?
Magic Number measures S&M spend efficiency relative to ARR generated in a single quarter. CAC Payback Period measures how long it takes to recover the cost of acquiring a customer through sales and marketing. They're complementary metrics: magic number is broader (company-level), while CAC payback is customer-specific.
Is my data secure?
Yes. All calculations happen 100% in your browser. Nothing is transmitted, stored, or seen by our servers. Your financial data never leaves your device.
Can I use this on mobile?
Yes, this tool is fully responsive and works perfectly on phones, tablets, and desktop computers. All functionality is available on every device.
About This Tool
Built by the Calcyo team and last updated June 2026. All calculations follow industry-standard methodology. No data leaves your browser — calculations run entirely client-side using JavaScript. If you spot an error in the formula or benchmark data, email us at support@calcyo.xyz.