The Rule of 40 for SaaS companies states that a firm's combined year-over-year revenue growth rate and EBITDA margin (as a percentage of revenue) should exceed 40%. This benchmark balances rapid growth with profitability to ensure sustainable financial health, popularized by investor Brad Feld.
The Rule of 40 SaaS states that the sum of a healthy SaaS company's annual recurring revenue growth rate and its EBITDA margin should be equal to or exceed 40%. It is a measure of how well a SaaS balances growth with profitability.
Rule of 40 = Revenue Growth Rate (%) + Profit Margin (%)
Some other potential examples of the Rule of 40 include the following: Revenue Growth Rate of 20% + Profit Margin of 20% = 40% Revenue Growth Rate of 0% + Profit Margin of 40% = 40%
What is the rule of 50 EBITDA? The “rule of 50” combines a company's EBITDA margin and revenue growth rate. If the sum of these two metrics is 50 or more, the company is considered to be in a strong position.
It dictated that a company's revenue growth rate plus its EBITDA margin should be equal to or greater than 40% (20% revenue growth + 20% EBITDA margins = 40%). This Rule was a guiding star for many SaaS CEOs, illuminating the path to balancing growth and profitability.
But, the most successful entrepreneurs practice the 60/40 rule in every interaction. The rule is simple — in any conversation, as the person who is conceptualizing, developing, selling or optimizing an idea, you should listen at least 60% of the time; and talk no more than 40% of the time.
The Rule of 40 – popularized by Brad Feld – states that an SaaS company's revenue growth rate plus profit margin should be equal to or exceed 40%. The Rule of 40 equation is the sum of the recurring revenue growth rate (%) and EBITDA margin (%).
40% margin = 66.7% markup.
When to Use the Rule of 40. The Rule of 40 provides the most value for mature SaaS companies with established business models. Early-stage startups often prioritize aggressive growth over immediate profitability, making this metric less applicable since the company is only focusing on half of the equation.
This preference reflects his belief that understanding the core earnings power of a business is crucial for making informed investment decisions. In summary, Buffett's preference for EBIT over EBITDA is grounded in his commitment to value investing and understanding a company's true profitability.
On the other hand, a high Rule of 40 can be misleading when the metrics are out of balance. For example, a company growing 80% with -30% EBITDA margin. The Rule of 40 is equal to 50, but a heavy cash burn can be unsustainable.
A "good" EBITDA varies depending on the industry sector and the company's size, but generally, a higher EBITDA indicates strong operational efficiency and profitability. In many industries, an EBITDA margin between 10% and 20% is considered solid, with anything above 20% seen as exceptional.
Rule of 40: Revenue growth rate + EBITDA margin should exceed 40% Net Revenue Retention: Indicates expansion revenue and churn dynamics. CAC Payback Period: Reveals customer acquisition efficiency. Free Cash Flow Margin: Shows actual cash generation capability.
Generally speaking, a good EBITDA margin for manufacturing businesses falls between 5% and 10%.
EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) is a financial metric showing a company's operating profitability by adding back non-operating expenses (Interest, Taxes) and non-cash expenses (Depreciation, Amortization) to net income, offering a clearer view of cash flow and making it easier to compare companies with different capital structures or tax situations, but it's not a perfect measure as it ignores real costs like asset wear-and-tear. Think of it as a simplified "scorecard" of core business performance before financing, taxes, and accounting entries.
NVIDIA Corporation (NVDA) Rule of 40 (EBIT margin) annual & quarterly (2006–2025) Rule of 40 (EBIT margin) is a performance metric used to evaluate the balance between growth and profitability in software companies, combining EBIT margin and revenue growth rate.
Warren Buffett's 8+8+8 Rule — A Lesson for Every Professional This rule reminds us of the importance of balance in our daily lives: 8 hours for work, 8 hours for rest, and 8 hours for personal time. This principle highlights the value of employee well-being, productivity, and sustainable performance.