What is considered a good Rule of 40 score?

A score at or above 40% is considered healthy, but the bar is tough to clear in practice — surveys of private SaaS companies show the median company scores only around 12% (roughly 10% growth plus 6% EBITDA margin). Standout performers clearing 40%+ are the exception rather than the norm, and they have historically commanded premium revenue multiples.

Should I use EBITDA margin or free cash flow margin?

Most private and mid-market SaaS companies default to EBITDA margin since it's easy to calculate from standard financials and strips out non-cash items like depreciation. Later-stage and public companies often prefer free cash flow margin because it reflects actual cash generation — whichever you pick, stay consistent across periods so trends are comparable.

Can an early-stage, unprofitable SaaS startup still pass the Rule of 40?

Yes — the rule rewards growth and profitability equally, so a startup growing revenue 60% year-over-year with a -20% EBITDA margin still scores exactly 40 and is considered healthy. This is why it's most meaningful when comparing companies of similar age and stage, since a mature 10%-growth company needs a 30% margin to hit the same score.

How does the Rule of 40 affect SaaS valuations?

Public SaaS companies that consistently clear 40 have historically traded at meaningfully higher revenue multiples than companies well below the threshold, which is why many VC and growth-equity investors use it as a quick screening tool in diligence. It correlates strongly with — but doesn't guarantee — premium valuations.

What are the limitations of the Rule of 40 as a single metric?

It treats a point of growth as equal in value to a point of margin, even though investors in high-growth SaaS often pay a premium for growth specifically — which is why some analysts use the 'Rule of X,' weighting growth roughly 2x over profitability. It's also a backward-looking snapshot that says nothing about the quality or durability of growth and margins, so it should be paired with metrics like net revenue retention and CAC payback rather than used alone.

SaaS Rule of 40 Calculator: Growth + Profitability Score for 2026

Calculate your Rule of 40 score by combining revenue growth rate and profit margin to see if your SaaS company hits the healthy 40% benchmark.

Current Period Revenue ($)

Prior Period Revenue ($)

Profitability Metric

EBITDA Margin Amount ($, can be negative)

SaaS Rule of 40 Calculator

Enter your current and prior revenue plus a profitability metric to calculate your Rule of 40 score.

Mathematical Audit

How the Rule of 40 Score Is Calculated

The Rule of 40 adds your year-over-year revenue growth rate to your profit margin. A combined score of 40% or higher is considered a healthy balance between growth and profitability for a SaaS company.

Growth Rate (%) = (Current Period Revenue − Prior Period Revenue) ÷ Prior Period Revenue × 100

Profit Margin (%) = Profitability Metric (EBITDA, FCF, or Net Income) ÷ Current Period Revenue × 100

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

A fast-growing, unprofitable company (60% growth, -20% margin) can score exactly 40, the same as a mature, profitable one (10% growth, 30% margin) — the metric is most useful comparing companies of similar stage. Pick either EBITDA margin or free cash flow margin and stay consistent across periods so trends remain comparable.

Operational Guide

How to Use the Rule of 40 Calculator

Enter Current Period Revenue

Your ARR or revenue for the most recently completed period (quarter or year).

Enter Prior Period Revenue

Revenue from the same length period immediately before, used to calculate your growth rate.

Choose your profitability metric

Select EBITDA margin, free cash flow margin, or net income margin — whichever you track consistently.

Enter the profitability amount

Your EBITDA, free cash flow, or net income for the current period. This can be negative if you're operating at a loss.

Review your score

See your growth rate, profit margin, and combined Rule of 40 score, plus whether you clear the 40% healthy threshold.

Real-World Scenario Example

"A SaaS company grew revenue from $3.5M to $5M this year and posted $250,000 in EBITDA on that $5M revenue."

Inputs

currentRevenue:5000000

priorRevenue:3500000

profitabilityMetricType:ebitda-margin

profitMetricAmount:250000

Result

Growth Rate = 42.9%, EBITDA Margin = 5%, Rule of 40 Score = 47.9 — comfortably above the 40% healthy benchmark.

Important Disclaimer

This calculator provides a directional benchmark only. Rule of 40 scoring is most meaningful when compared against similarly staged companies and tracked consistently over multiple periods using the same profitability metric.

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Sources & References

SaaS Capital — Growth, Profitability, and the 'Rule of 40' for Private SaaS Companies

https://www.saas-capital.com/blog-posts/growth-profitability-and-the-rule-of-40-for-private-saas-companies/

CloudZero — The Rule Of 40: How To Calculate And Use It For SaaS

https://www.cloudzero.com/blog/rule-of-40/

Calculator Inputs

Calculation Results

SaaS Rule of 40 Calculator

How the Rule of 40 Score Is Calculated

How to Use the Rule of 40 Calculator

Enter Current Period Revenue

Enter Prior Period Revenue

Choose your profitability metric

Enter the profitability amount

Review your score

Real-World Scenario Example

Important Disclaimer

What is considered a good Rule of 40 score?

Should I use EBITDA margin or free cash flow margin?

Can an early-stage, unprofitable SaaS startup still pass the Rule of 40?

How does the Rule of 40 affect SaaS valuations?

What are the limitations of the Rule of 40 as a single metric?

Related Calculators

SaaS Burn Rate & Cash Runway Calculator

SaaS Magic Number Calculator

SaaS Net Revenue Retention (NRR) Calculator

Sources & References

Calculator Inputs

Calculation Results

SaaS Rule of 40 Calculator