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Rule of 40 Calculator for SaaS & Software Stocks
Calculate the Rule of 40 score for any SaaS or software company — revenue growth rate plus profit margin. Instant results from live financial data. Free.
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SaaS Rule of 40 Comparison
| # | Ticker | Company | Growth % | FCF Margin % | Score | Verdict |
|---|---|---|---|---|---|---|
| 1 | CRWD | CrowdStrike | 33.0% | 30.0% | 63.0 | Elite |
| 2 | ZS | Zscaler | 34.0% | 22.0% | 56.0 | Strong |
| 3 | PANW | Palo Alto Networks | 14.0% | 38.0% | 52.0 | Strong |
| 4 | VEEV | Veeva Systems | 15.0% | 35.0% | 50.0 | Strong |
| 5 | DDOG | Datadog | 26.0% | 23.0% | 49.0 | Strong |
| 6 | MNDY | monday.com | 32.0% | 13.0% | 45.0 | Strong |
| 7 | DT | Dynatrace | 20.0% | 25.0% | 45.0 | Strong |
| 8 | CRM | Salesforce | 11.0% | 33.0% | 44.0 | Strong |
| 9 | TEAM | Atlassian | 20.0% | 24.0% | 44.0 | Strong |
| 10 | TTD | The Trade Desk | 26.0% | 18.0% | 44.0 | Strong |
| 11 | WDAY | Workday | 17.0% | 25.0% | 42.0 | Strong |
| 12 | HUBS | HubSpot | 21.0% | 17.0% | 38.0 | Borderline |
| 13 | SNOW | Snowflake | 32.0% | 5.0% | 37.0 | Borderline |
| 14 | NET | Cloudflare | 29.0% | 7.0% | 36.0 | Borderline |
| 15 | OKTA | Okta | 22.0% | 14.0% | 36.0 | Borderline |
| 16 | MDB | MongoDB | 22.0% | 11.0% | 33.0 | Borderline |
| 17 | S | SentinelOne | 36.0% | -6.0% | 30.0 | Borderline |
| 18 | DOCN | DigitalOcean | 12.0% | 16.0% | 28.0 | Failing |
| 19 | CFLT | Confluent | 25.0% | 3.0% | 28.0 | Failing |
| 20 | BILL | BILL Holdings | 18.0% | 8.0% | 26.0 | Failing |
How to use the Rule of 40 calculator
Enter the ticker
Type any US-listed software or SaaS ticker. The calculator pulls trailing revenue, prior-year revenue, and margin data from live Yahoo Finance financials.
Choose margin type
FCF margin is most rigorous. EBITDA margin is most cited in VC discussions. Operating margin falls in between. The tool shows all three — pick the one most relevant to your analysis.
Read the Rule of 40 score
Revenue Growth Rate + Profit Margin. Above 40 = healthy. Above 60 = elite. Below 20 = concern. Context matters — a high-growth company burning cash can still be healthy if trajectory is right.
Assess the tradeoff
40 from 50% growth / -10% margin is a growth story that needs to land. 40 from 15% growth / 25% margin is a compounder. Very different risk profiles despite identical scores.
The growth vs profitability tradeoff in software
Why software companies face a unique tradeoff
Software businesses have high gross margins (70–85% is typical) and near-zero marginal distribution costs. This creates a seductive choice: plow every dollar of gross profit into sales and marketing to accelerate customer acquisition (maximize growth, sacrifice profitability), or harvest current customers for cash flow (maximize profit, accept slower growth). The Rule of 40 is a framework for judging whether the tradeoff a company is making is sustainable.
Where the 40 threshold comes from
The Rule of 40 originated in VC circles in the early 2010s as a quick heuristic: if a SaaS company's revenue growth rate plus profit margin adds up to 40% or more, the business is on a healthy trajectory regardless of where on the growth/profit spectrum it sits. Bain & Company research later confirmed that public software companies consistently above 40 significantly outperformed those below — both in absolute returns and in EV/Revenue multiples.
The Rule of 40 vs traditional metrics
Traditional profitability metrics (P/E, net margin) penalize fast-growing software companies for investing aggressively in growth. The Rule of 40 recognizes that a company growing at 60% YoY is creating enormous value even at -10% free cash flow margin — because future cash flows are large and getting larger. It rewards the combination, not just the profitability or just the growth alone.
Limitations to know
The Rule of 40 is useful but imperfect. It doesn't account for customer retention (net revenue retention matters as much as new sales growth), gross margin (a 60% gross margin business scoring 40 is very different from an 80% gross margin business), or one-time revenue items. Use it as a screen, then dig deeper with margin analysis and customer cohort data.
At what point should growth slow?
The best SaaS businesses transition from high-growth / low-profit to moderate-growth / high-profit as they mature — maintaining Rule of 40 throughout. Companies like Veeva Systems, Tyler Technologies, and Paycom made this transition successfully. Warning signs of a bad transition: growth slows but margins don't improve (growth was buying customers that don't renew), or margins improve only through cost cuts that impair the product.
Rule of 40 and valuation multiples
Research consistently shows that Rule of 40 score is one of the strongest predictors of EV/Revenue multiples for public software companies. Companies above 60 typically trade at 10–20× revenue; those in the 40–60 range at 6–12×; those below 40 at 3–8×. The premium is real and persistent because the market correctly prices in that high-Rule-of-40 companies are likely to generate more cash over their lifetime.
Frequently asked questions
What is the Rule of 40?
The Rule of 40 is a benchmark for SaaS and software company health: Revenue Growth Rate + Profit Margin should equal or exceed 40%. It captures the tradeoff between growth and profitability — a company growing at 60% can be burning cash, while a mature company at 5% growth should be highly profitable. Balancing these forces is the fundamental challenge of running a software business.
Which profit margin should I use for the Rule of 40?
The industry uses different definitions — FCF margin, operating margin, or EBITDA margin. FCF margin (free cash flow ÷ revenue) is the most rigorous because it's hardest to engineer. EBITDA margin is the most commonly cited in VC and growth equity discussions. Operating margin falls in between. This calculator shows all three; FCF-based Rule of 40 is generally the most conservative and reliable.
What is a good Rule of 40 score?
Above 40 is the baseline for a healthy SaaS company. Above 60 is exceptional — companies in this range include Salesforce at its peak growth phase, Veeva Systems, and Datadog. Below 40 isn't necessarily bad if the company is reinvesting heavily for growth, but sustained scores below 20 suggest the business model may not support both growth and eventual profitability.
How do you use the Rule of 40 for valuation?
Research by Bain and McKinsey found that software companies with Rule of 40 scores above 40 trade at significantly higher EV/Revenue multiples and generate better shareholder returns over time. Investors use it as a screen — companies consistently above 40 tend to receive premium valuations; those below often trade at discounts to peers. Combine Rule of 40 with net revenue retention and gross margin for a fuller SaaS quality picture.
FINISHED THE NUMBERS?
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Assumptions, scenarios, and what breaks them — on any public company.
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