Rule of 40 Calculator

Enter revenue growth rate percentage and profit margin percentage, typically EBITDA margin or free cash flow margin for SaaS. Rule of 40 states healthy SaaS companies combine growth plus margin at forty percent or higher. Public SaaS medians near Rule of forty separate durable growers from burn heavy stories during risk off markets. Public SaaS multiples compress when Rule of forty score falls below thirty five during risk off periods even if growth remains positive. Public market SaaS investors use Rule of forty as quick filter during earnings season comparing reported growth rate plus margin to forty threshold for premium versus discount valuation multiples. Public SaaS investors apply Rule of forty filter during earnings season comparing reported growth plus margin to forty percent threshold quickly.

Review Rule of 40 score, growth component, margin component, and pass fail flag against forty threshold. Score of forty five with twenty percent growth and twenty five percent margin beats score of forty with forty percent growth and zero margin on quality of earnings basis. High growth low margin acceptable early if path to margin expansion documented. Improving FCF margin through S and M efficiency raises Rule of forty score without sacrificing growth rate component. Private companies approaching profitability can improve Rule of forty score by expanding margin while maintaining growth rather than only chasing growth at deepening losses. Improving margin through S and M efficiency raises score without sacrificing growth component in Rule of forty framework. Margin expansion through S and M efficiency improves Rule of forty score without requiring growth rate sacrifice in operating plan design. Private companies approaching profitability improve Rule of forty by expanding margin while maintaining growth rate in operating plan design phase. Public SaaS multiples correlate with rule of forty score when growth decelerates and margin expansion becomes primary valuation driver in mature segment peers. Stock based compensation excluded from GAAP margin flatters rule of forty unless adjusted for dilution impact on per share economics in investor presentations. Services revenue mixed into subscription business lowers growth rate and margin simultaneously masking pure software metrics in consolidated rule of forty headline. Temporary cost cuts from layoffs boost margin year without structural efficiency gain creating unsustainable rule of forty spike next period.

Without requiring growth rate sacrifice in operating plan design. Private companies approaching profitability improve Rule of forty by expanding margin while maintaining growth rate in operating plan design phase. Public SaaS multiples correlate with rule of forty score when growth decelerates and margin expansion becomes primary valuation driver in mature segment peers. Stock based compensation excluded from GAAP margin flatters rule of forty unless adjusted for dilution impact on per share economics in investor presentations. Services revenue mixed into subscription business lowers growth rate and margin simultaneously masking pure software metrics in consolidated rule of forty headline. Temporary cost cuts from layoffs boost margin year without structural efficiency gain creating unsustainable rule of forty spike next period.

Use Rule of 40 Calculator whenever inputs change: after market moves, new contributions, or revised personal assumptions. Bookmark the page for quick reruns without installing software.

Enter revenue growth rate percentage and profit margin percentage, typically EBITDA margin or free cash flow margin for SaaS. Enter the sample inputs described in How it works to reproduce the scenario step by step.

Adjust one input at a time to see sensitivity. Rule of 40 Calculator updates instantly so you can stress test optimistic and conservative assumptions before acting.

Reach for Rule of 40 Calculator when measure growth rate plus profit margin to evaluate saas investment attractiveness. It suits quick what if analysis before trades, allocation changes, or plan updates.

Pair with related tools when the decision spans taxes, liquidity, or multi year projections beyond what one formula captures.

Copying outputs without checking input units or stale market prices is a frequent error with Rule of 40 Calculator. Confirm tickers, percentages, and dates before acting.

Running a single baseline scenario ignores tail risks. Stress test with conservative inputs and compare against related tools listed below when the decision is material.

Score equals growth rate plus margin percentage. Both inputs should use same period basis. Same period basis required for growth and margin inputs. Same fiscal period for both inputs. Non SaaS firms use different benchmark frameworks. Public SaaS earnings calls often reference Rule of forty score when explaining premium or discount valuation versus peers. Rule of forty score equals revenue growth rate percent plus free cash flow margin percent or EBITDA margin percent depending on company stage convention disclosed consistently year over year in shareholder letter narrative accompanying earnings release. Educational estimates only not personalized advice consult qualified professional before major financial decisions. Educational estimates only not personalized advice consult qualified professional before major financial decisions. Rule of 40 Calculator does not replace personalized advice. Fees, slippage, account specific rules, and behavioral constraints may change real world outcomes.

Protect revenue base with SaaS Churn Damage and acquisition efficiency with LTV CAC Ratio on portfolios. Use those calculators when rule of 40 calculator alone does not capture the full decision.

Internal links on portfolios.tools help you chain calculators: run Rule of 40 Calculator first, then validate edge cases with a specialized tool from the related section below.