SaaS Rule of 40 Calculator

Calculate Rule of 40 from revenue growth rate and profit margin to assess SaaS growth efficiency.

Last reviewed May 27, 2026 by CalcMastery Editorial Team; Reviewed by CalcMastery Finance Review Team

Rule of 40 Calculator

Evaluate SaaS growth efficiency by combining revenue growth rate and profit margin. Clean UX with helpful tooltips, scenarios, and What It Means insights.

%

Year-over-year revenue growth rate. If using quarterly data, annualize the QoQ growth appropriately.

%

Enter your profit margin (e.g., operating or EBITDA). Use negative values for losses.

Try scenarios
Examples: Balanced Meets 40, High-growth Unprofitable, Profitable but Slower Growth, and Early-stage Negative.
Balanced (Meets 40)High Growth, UnprofitableProfitable, Slower GrowthEarly-stage Negative

Results

  • Rule of 40— %
  • Category—

Enter your inputs above to calculate the results.

Use this SaaS Rule of 40 calculator to combine revenue growth and profitability into one efficiency score. Enter annual revenue growth rate and a profit margin such as EBITDA margin, operating margin, or free cash flow margin. The result shows whether growth and margin together clear the Rule of 40 benchmark used by SaaS operators and investors.

What is the SaaS Rule of 40?

The SaaS Rule of 40 is a composite performance metric that adds a company’s revenue growth rate to its profit margin to assess whether growth and profitability are in a healthy balance.

A score at or above 40% signals attractive value creation, strong unit economics, and usually better valuation multiples, while a score below 40% can indicate inefficient growth, weak cash generation, or a need to revisit CAC payback, LTV:CAC ratio, and operating leverage.

Formula

Rule of 40 (%) = Revenue Growth Rate (%) + Profit Margin (%)

In practice, the profit margin term is often EBITDA margin, operating margin, or free cash flow margin for more mature SaaS and recurring revenue companies, as long as the definition stays consistent over time.

Example

Imagine a SaaS business with 30% year-over-year revenue growth (based on ARR or MRR) and a 15% operating margin.

Using the formula:

Rule of 40 = 30% + 15% = 45%

A 45% score sits above the 40% threshold, suggesting the company is balancing expansion and profitability well, likely supporting healthy enterprise-value-to-revenue multiples.

If the same company were growing 25% with a –5% EBITDA margin, the Rule of 40 would be math]25% + (-5\%) = 20%,[/math] a warning sign that growth may be too expensive and that management should tighten costs, improve retention and [net revenue retention (NRR), and optimize CAC payback before pushing for more top-line growth.

Related calculators and references

How to Use the SaaS Rule of 40 Calculator

This calculator lets you plug in your SaaS revenue growth and profit margin to instantly see your Rule of 40 score and whether you meet the 40% benchmark investors expect.

Define your analysis period

  • Decide which 12-month window you want to analyze (e.g., last fiscal year or trailing 12 months) and pull your recurring revenue and profit data for that period.

Enter your Revenue Growth Rate (%)

  • In the “Revenue Growth Rate” field, type your year-over-year recurring revenue growth as a percentage (for example, 30 for 30% growth).

Enter your Profit Margin (%)

    • In the “Profit Margin” field, enter your profit margin for the same period (EBITDA, operating, or free cash flow margin, expressed as a percentage). The calculator then applies the standard formula:
Rule of 40 = Revenue Growth Rate (%) + Profit Margin (%)

Review the results and interpretation

  • Check the “Results” card to see your Rule of 40 score and the Category label (for example, “Meets Rule of 40”), then read the “What It Means” section to understand whether you’re balanced, under-investing, or overspending for your growth level.

Test scenarios and reset if needed

  • Use the “Try scenarios” dropdown or manually adjust the two inputs to see how different combinations of growth and margin affect your score; click “Reset” to clear everything and start a fresh analysis, and expand “Show charts (optional)” if you want a visual view of the trade-offs.

Frequently Asked Questions

These FAQs explain Rule of 40 inputs, margin choices, growth tradeoffs, and how to interpret the score.

What numbers should I enter for Revenue Growth Rate and Profit Margin in this SaaS Rule of 40 calculator?

Use your year-over-year growth in recurring revenue (MRR or ARR) for Revenue Growth Rate and a consistent profit metric (typically EBITDA, operating, or free cash flow margin) for Profit Margin, all for the same 12-month period.

How do I know if my Rule of 40 score from the calculator is good or bad?

As a rule of thumb, a score below 20% signals weak performance, 20–40% is borderline, and 40% or higher generally indicates a healthy balance of growth and profitability that investors look for.

Can my SaaS still “pass” the Rule of 40 if my profit margin is negative in the calculator?

Yes—if your revenue growth is high enough to offset the losses; for example, 60% growth and –15% margin still give a Rule of 40 score of 45%, which clears the 40% bar.

Should I base the calculator inputs on a single month or on annual figures?

For meaningful results, use year-over-year growth and margins based on ARR or MRR over the last 12 months, rather than one noisy month or quarter.

Sources & Methodology