The Rule of 40 – what is it, and why does it matter? (2024)

Hypergrowth remains the primary goal of most SaaS businesses. However, what defines growth? Even more importantly, what is a realistic growth rate to target? In recent years, the Rule of 40 has been a standard benchmark used to define a healthy SaaS company. This rule states that the sum of a company’s percent ARR (Annual Recurring Revenue) growth and its margins (free cash flow) should be greater than or equal to 40 percentage points. Several factors can contribute to each growth variable:

  1. ARR growth: There are multiple ways to achieve ARR growth – whether it be through organic growth (customer acquisition, customer retention, cross-selling, up-selling, etc.), new product development, or pricing.
  2. Margins: Factors here are not mutually exclusive of those contributing to ARR growth but can include other cost improvements across non-essential activities such as travel costs or essential activities like service quality and R&D investments.

However, most companies have historically struggled to achieve the Rule of 40. In fact, data from KeyBanc Capital Markets’ (KBCM) 2021 SaaS Survey indicated that only 29% of companies exceeding $5MM ARR managed to meet this target.

So, is the Rule of 40 still a relevant metric, especially given recent economic headwinds? According to 50% of SaaS executives participating in Simon-Kucher’s 2023 Global Software Study, the answer is no. However, this is not the whole story. The study also tells us that that not all growth metrics should be weighed equally, and that the Rule of 40 should be evaluated in each situation. For example, it appears that revenue size likely plays a role when evaluating this age-old rule.

The Rule of 40 – what is it, and why does it matter? (1)

While only around one-third of overall respondents believe the Rule of 40 is too high a standard in the current economic environment, over half of small SaaS companies (those with less than $10M in revenue) consider the target unattainable. On the other hand, larger firms (those with over $1B in revenue) are likely to view the Rule of 40 as too conservative.

Smaller or newer companies will likely have a more difficult time achieving the Rule of 40 due to several factors: needing to build teams and retain staff, time spent gaining new customers, and developing and setting up the ways they go to market. These factors are likely to require high investment costs in relation to their size and squeeze margins. Newer companies may not have the experience or resources to properly navigate the current economic climate.

In this context, indexing towards a 40% growth metric does not set them up for success: it is not only an unrealistic goal, but may distract them from other initiatives (such as hiring the right staff, focusing on customer acquisition and on sales strategies) that would allow them to scale later on. In contrast, larger companies who can achieve greater operational efficiency and have a stronger grasp on the market are more likely to sustain the Rule of 40.

What is a reasonable goal if the Rule of 40 is not realistic for your company?

Based on responses during our study, executives at small firms report that in the current economic climate, a 10-30% growth and profit margin target is a much more sustainable goal.

The Rule of 40 – what is it, and why does it matter? (2)

Starting smaller and encouraging a right-sized approach to growth until a company can achieve critical mass in revenue is likely to be more sustainable in the long run. This allows growing companies to focus on initiatives that are critical to their future growth and profitability, until they can strike a balance between the two.

All in all, the Rule of 40 is not dead, but it should not be your only plan of action. If we want to fairly assess SaaS companies, then their economic environment, their company size, and their growth stage should be taken into consideration before any conclusions are made.

In this article we discussed the relevance of the Rule of 40, but your business likely has even more areas where it can improve. Reach out to our growth experts at Simon-Kucher if you are ready to accelerate your return to growth.

The Global Software Study survey was conducted from May to July 2023 by Simon-Kucher, with fielding through panel data provided by RepData, an independent market research agency. The study surveyed 500+ software executives across 20 countries, including the United States.

The Rule of 40 – what is it, and why does it matter? (2024)

FAQs

The Rule of 40 – what is it, and why does it matter? ›

In recent years, the Rule of 40 has been a standard benchmark used to define a healthy SaaS company. This rule states that the sum of a company's percent ARR (Annual Recurring Revenue) growth and its margins (free cash flow) should be greater than or equal to 40 percentage points.

Why does the rule of 40 matter? ›

The Rule of 40 is a mere rule of thumb to analyze the health of an SaaS business, with regard to its growth rate in recurring revenue and profit margin. To accurately interpret the SaaS KPI metric, 40% is the baseline figure at which the company is considered healthy and in good shape.

What is the rule of 40 for dummies? ›

The Rule of 40 is a principle that states a software company's combined revenue growth rate and profit margin should equal or exceed 40%. SaaS companies above 40% are generating profit at a rate that's sustainable, whereas companies below 40% may face cash flow or liquidity issues.

What is the 40 rule for sustainable growth? ›

It states that a company's combined growth rate and profit margin should equal or exceed 40%. In simpler terms, if you're running a SaaS startup or in charge of the marketing engine, this rule is your litmus test for balancing rapid growth with sustainable profitability.

What is the rule of 40 formula? ›

The rule of 40 formula requires just two inputs, growth and profit margin. To calculate this metric, you simply add your growth in percentage terms plus your profit margin. For example, if your revenue growth is 15% and your profit margin is 20%, your rule of 40 number is 35% (15 + 20) which is below the 40% target.

What is the rule of 40 example? ›

According to Techstars Co-founder Brad Feld in 2015, the Rule of 40 says that a healthy SaaS company has a combined growth rate and profit margin of 40% or more. For example, you could grow 40% quarter-over-quarter with a profit margin of 0%.

Does the rule of 40 still apply? ›

It should be noted that the Rule of 40 only applies to SaaS businesses. This is because software companies that leverage their services to other businesses are known to manage higher margins between 70% and 90%. However, this rule of thumb can still be applied as a useful benchmark for other subscription companies.

Can rule of 40 be negative? ›

However, as long as you are burning money to drive growth, the Rule of Negative 40 is a much better metric. Here's why: For every dollar of additional revenue, you are adding, at a minimum, 6x that in additional company enterprise value, given the low end of SaaS valuations.

What companies are rule of 40? ›

Index Constituents
TickerCompanyRule of 40 Score
AYXAlteryx41
CRWDCrowdStrike40
CWANClearwater Analytics40
CRMSalesforce40
43 more rows

Is the 40 rule true? ›

In brief, the 40% Rule[1] says that when you have gone as far as you can humanly go, when you cannot take another step, you have only tapped 40% of your resources and you have another 60% left. It is said to apply to all kinds of endeavors, not just physical ones. I have no doubt that it is true.

What is rule of 40 profitability? ›

The Rule of 40 states that, at scale, a company's revenue growth rate plus profitability margin should be equal to or greater than 40%.

What is the rule of 40 investing? ›

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

Here's a simple example: If a company has a revenue growth rate of 20% and an EBITDA margin of 30%, the Rule of 40 is met (20% + 30% = 50%), indicating a robust financial position.

Who invented the rule of 40? ›

The term “Rule of 40” was originally coined in 2015 by venture capitalists Brad Feld and Fred Wilson, referring to their view that venture-backed companies should strive to achieve 40% or greater when combining growth rate plus profitability margin.

What is the rule of 40 block? ›

JPMorgan analyst Tien-Tsin Huang said Block could set its Rule of 40 targets to come in earlier than expected. The rule of 40 references sustainable profits with revenue growth and profit margins over the 40% level when combined. The analyst has an Overweight rating and $90 price target.

How do you add 40%? ›

If you want to increase a number by a certain percentage, follow these steps:
  1. Divide the number you wish to increase by 100 to find 1% of it.
  2. Multiply 1% by your chosen percentage.
  3. Add this number to your original number.
  4. There you go. You have just added a percentage increase to a number!
Jan 18, 2024

How does rule of 40 affect valuation? ›

Falling below the 40% threshold may signal that the company is not effectively managing its growth and profitability, leading to reduced investor interest. **2. Valuation Discount: Companies with a Rule of 40 score below 40% might receive a valuation discount compared to companies that meet or exceed the benchmark.

Is a profit margin of 40 good? ›

Obviously, yes 40% profit margin in a business is a very big deal as it depends upon the industry in which you are working but the average net profit margin is considered to be at 10% and 20% margin is considered a good margin of profit, 5% is low.

What is the modified rule of 40? ›

The Rule of 40 is a financial benchmark used to assess the health and performance of SaaS companies. It stipulates that the sum of a company's annual revenue growth rate and profit margin should be at least 40%​​. This metric balances revenue growth against profit, providing a quick health check for SaaS companies​​.

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