SaaS Magic Number & Go-To-Market Sales Efficiency Calculator
### Venture Capital Metrics: The Bessemer SaaS Magic Number Developed by **Bessemer Venture Partners**, the **SaaS Magic Number** is the gold-standard metric for deciding whether a subscription.
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📐 Formula
💡 Practical Example
For example, evaluating a SaaS company that grew quarterly revenue from $1,000,000 in Q1 to $1,250,000 in Q2 on $280,000 of Q1 S&M spend with an 80% gross margin: \. The Gross Margin-Adjusted Magic Number is \, delivering a 3.4-Month implied CAC payback.
📖 About SaaS Magic Number & Go-To-Market Sales Efficiency Calculator
Venture Capital Metrics: The Bessemer SaaS Magic Number
Developed by Bessemer Venture Partners, the SaaS Magic Number is the gold-standard metric for deciding whether a subscription business should accelerate marketing spend:
- Magic Number > 1.0x (Pour on the gas): The business generates over 1.00 of high-margin recurring ARR for every 1.00 invested in sales; aggressive expansion is warranted.
- 0.75x to 1.0x (Good efficiency): Healthy unit economics; continue steady scaling.
- < 0.50x (Red flag): Sales cycles are too long or customer churn is eroding growth; do not increase sales headcount until the funnel is repaired.
How to Use This Calculator
Enter your Current Quarter GAAP Recurring Revenue (Q_t in ) (e.g. 1250000), Prior Quarter GAAP Recurring Revenue (Q_t-1 in ) (e.g. 1000000), Prior Quarter Sales & Marketing Expense (S&M_t-1 in ) (e.g. 280000 (Fully-loaded S&M from prior quarter)), and Product Gross Profit Margin (%) (e.g. 80.0). Results update instantly as you type — adjust any value to compare scenarios.
The Formula
Bessemer Venture Partners SaaS Magic Number & Sales Efficiency equations: New Annualized Revenue = (Q_t - Q_t-1) × 4 Magic Number = (Q_t - Q_t-1) × 4Sales \& Marketing Expense_t-1 Margin-Adjusted Magic Number = SaaS Magic Number × Gross Margin (\%) CAC Payback Period (Months) = (12) / (Gross Margin-Adjusted Magic Number) = S\&M_t-1 × 12(Q_t - Q_t-1) × 4 × Margin
Worked Example
For example, evaluating a SaaS company that grew quarterly revenue from 1,000,000 in Q1 to 1,250,000 in Q2 on 280,000 of Q1 S&M spend with an 80% gross margin: . The Gross Margin-Adjusted Magic Number is delivering a 3.4-Month implied CAC payback.
Understanding Your Result
Benchmark monthly churn rates for SaaS: Best-in-class below 0.5%, good 0.5–1%, average 1–2%, above 2% requires urgent attention. Annual churn above 24% (2% monthly) means the business replaces its entire customer base every 4–5 years — growth becomes a treadmill. Net Revenue Retention (NRR) above 100% means existing customers expand faster than they churn — the most powerful growth lever available. Top-quartile SaaS companies have NRR above 120%. Monthly churn of 1% compounding annually equals 11.4% annual customer loss.
💡 Methodological Standards & Calculation Accuracy
- All calculations are performed client-side in your browser using verified, standards-compliant mathematical algorithms.
- Results are provided for educational and informational analysis; verify critical applications with certified domain specialists.
- Ensure input values are entered in consistent units matching the selector options to guarantee accurate outputs.
- Periodic recalibration is recommended whenever baseline assumptions, operating parameters, or external conditions change.
Results are for informational and educational purposes only. Always verify critical decisions with a qualified professional.