Rule of 40計算機

Q: What is a good Rule of 40 score?

40+ is the threshold. 50+ is excellent. Companies scoring 40+ are considered healthy and can balance growth and profitability. Below 40 means one of the two dimensions needs attention.

Q: Can a company with negative margins have a good Rule of 40?

Yes. A company growing 60% with -20% margin scores 40 (60 - 20). High growth compensates for negative profitability. The rule allows trade-offs between growth and profit.

Q: How does the Rule of 40 vary by company stage?

Early-stage companies typically have high growth (50-100%) and negative margins (-20 to -50%), still hitting 40+. Mature companies have lower growth (15-25%) but positive margins (15-25%).

Q: What profit margin should I use?

Use operating margin (EBITDA margin or operating income / revenue). Free cash flow margin is also acceptable. Use consistent definitions when comparing across periods.

Q: How often should I calculate Rule of 40?

Quarterly is standard. Annual is common for board reporting. Track the trend - improving scores indicate better balance between growth and efficiency.

Q: What if my Rule of 40 is below 40?

Focus on improving either growth (through product investment, GTM expansion) or profitability (cost reduction, pricing optimization). Address the weaker dimension first.

Q: Does the Rule of 40 apply to non-SaaS businesses?

It was designed for SaaS but applies to any recurring-revenue business. Professional services and hardware businesses typically don't use this metric.

Q: How do investors use the Rule of 40?

Public market investors use it to value SaaS companies. Companies with higher Rule of 40 scores command higher revenue multiples. It's a standard slide in board meetings and earnings calls.

収益成長率に利益率を加えたRule of 40スコアを計算してSaaS企業の健全性を測定します。

The Rule of 40 is the most widely used health metric for SaaS companies. It states that a company's revenue growth rate plus profit margin should equal or exceed 40%. A company growing at 30% with a 10% profit margin scores 40 - the threshold for a healthy SaaS business. The rule recognizes that high-growth companies may sacrifice profitability (negative margins) as long as growth is strong enough to compensate. This metric is used by investors, board members, and management teams to evaluate whether a company is striking the right balance between growth and profitability.

この計算機の使い方

Enter your year-over-year revenue growth rate (as a percentage) and your current profit margin (as a percentage).
Profit margin can be negative for high-growth companies.
The calculator will compute your Rule of 40 score and tell you whether you meet the threshold..

計算式と具体例

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

Example: Growth = 30%, Margin = 10%.

Score = 30 + 10 = 40.

The company meets the threshold.

A company growing at 50% with -15% margin scores 35 = 50 - 15 = 35.

Below 40 but close..

業界ベンチマーク

According to KeyBanc Capital Markets 2025 SaaS Survey, median public SaaS Rule of 40 score is 35. Top-quartile companies score 50+. Companies above 40 are considered healthy and well-balanced. Companies below 20 are typically struggling with either growth or profitability. High-growth companies (50%+ growth) can have negative margins, while mature companies (10-20% growth) should be profitable.

指標	値	出典
Excellent	50+	KeyBanc 2025 SaaS Survey
Good (Meets Threshold)	40+	Industry Standard
Median Public SaaS	35	KeyBanc 2025 SaaS Survey
Needs Improvement	20 - 40	Industry Standard
Concerning	< 20	Industry Standard

よくある質問

What is a good Rule of 40 score?expand_more

40+ is the threshold. 50+ is excellent. Companies scoring 40+ are considered healthy and can balance growth and profitability. Below 40 means one of the two dimensions needs attention.

Can a company with negative margins have a good Rule of 40?expand_more

Yes. A company growing 60% with -20% margin scores 40 (60 - 20). High growth compensates for negative profitability. The rule allows trade-offs between growth and profit.

How does the Rule of 40 vary by company stage?expand_more

Early-stage companies typically have high growth (50-100%) and negative margins (-20 to -50%), still hitting 40+. Mature companies have lower growth (15-25%) but positive margins (15-25%).

What profit margin should I use?expand_more

Use operating margin (EBITDA margin or operating income / revenue). Free cash flow margin is also acceptable. Use consistent definitions when comparing across periods.

How often should I calculate Rule of 40?expand_more

Quarterly is standard. Annual is common for board reporting. Track the trend - improving scores indicate better balance between growth and efficiency.

What if my Rule of 40 is below 40?expand_more

Focus on improving either growth (through product investment, GTM expansion) or profitability (cost reduction, pricing optimization). Address the weaker dimension first.

Does the Rule of 40 apply to non-SaaS businesses?expand_more

It was designed for SaaS but applies to any recurring-revenue business. Professional services and hardware businesses typically don't use this metric.

How do investors use the Rule of 40?expand_more

Public market investors use it to value SaaS companies. Companies with higher Rule of 40 scores command higher revenue multiples. It's a standard slide in board meetings and earnings calls.

Rule of 40計算機

収益成長率に利益率を加えたRule of 40スコアを計算してSaaS企業の健全性を測定します。

業界ベンチマーク

指標	値	出典
Excellent	50+	KeyBanc 2025 SaaS Survey
Good (Meets Threshold)	40+	Industry Standard
Median Public SaaS	35	KeyBanc 2025 SaaS Survey
Needs Improvement	20 - 40	Industry Standard
Concerning	< 20	Industry Standard

よくある質問

What is a good Rule of 40 score?expand_more

40+ is the threshold. 50+ is excellent. Companies scoring 40+ are considered healthy and can balance growth and profitability. Below 40 means one of the two dimensions needs attention.

Can a company with negative margins have a good Rule of 40?expand_more

Yes. A company growing 60% with -20% margin scores 40 (60 - 20). High growth compensates for negative profitability. The rule allows trade-offs between growth and profit.

How does the Rule of 40 vary by company stage?expand_more

Early-stage companies typically have high growth (50-100%) and negative margins (-20 to -50%), still hitting 40+. Mature companies have lower growth (15-25%) but positive margins (15-25%).

What profit margin should I use?expand_more

Use operating margin (EBITDA margin or operating income / revenue). Free cash flow margin is also acceptable. Use consistent definitions when comparing across periods.

How often should I calculate Rule of 40?expand_more

Quarterly is standard. Annual is common for board reporting. Track the trend - improving scores indicate better balance between growth and efficiency.

What if my Rule of 40 is below 40?expand_more

Focus on improving either growth (through product investment, GTM expansion) or profitability (cost reduction, pricing optimization). Address the weaker dimension first.

Does the Rule of 40 apply to non-SaaS businesses?expand_more

It was designed for SaaS but applies to any recurring-revenue business. Professional services and hardware businesses typically don't use this metric.

How do investors use the Rule of 40?expand_more

Public market investors use it to value SaaS companies. Companies with higher Rule of 40 scores command higher revenue multiples. It's a standard slide in board meetings and earnings calls.