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Rule of 40: Formula, Benchmarks, and Calculator

Q: What is a good Rule of 40 score?

A score of 40% or higher is considered good - your revenue growth rate and profit margin together clear the benchmark, placing you in the healthy tier, and 60%+ is exceptional, top-decile performance. For context, the median Rule of 40 score across tracked SaaS companies was just 12% in Q1 2025, so clearing 40% genuinely puts you ahead of most of the category. Public SaaS companies above 40% command a median EV/Revenue multiple of 12.4x.

Q: Should I use EBITDA or Free Cash Flow for the margin component?

For private SaaS companies, EBITDA margin is the standard. It's easier to calculate from management accounts and is less influenced by working capital timing. Public SaaS companies and their analysts typically prefer Free Cash Flow margin because it's harder to manipulate through accounting adjustments and reflects the actual cash the business generates. If you're raising from institutional investors or planning an IPO, it's worth showing both.

Q: Should I use monthly or annual growth rate?

Year-over-year (YoY) is the standard for Rule of 40 calculations. Month-over-month growth rates are much higher numerically (a 5% MoM rate equals roughly 80% YoY), which would inflate your score and make it incomparable to benchmarks. Always use YoY ARR growth for a meaningful Rule of 40 score.

Q: Is a score below 40 always a bad sign?

Not necessarily. Very early-stage SaaS companies (under $1M ARR) are often still finding product-market fit - the Rule of 40 isn't particularly meaningful at that stage. The rule becomes more relevant from roughly $3-5M ARR onwards when growth patterns are more predictable. A sub-40 score driven by very high growth (50%+ YoY) with heavy investment in acquisition is often viewed positively, as long as there's a clear path to efficiency improvement.

Q: What's the median Rule of 40 score right now?

As of Q1 2025, the median Rule of 40 score across tracked SaaS companies sits at approximately 12%, with a median growth rate of 10% and EBITDA margins around 6%. The overall trend has declined from 2023 to 2025 as revenue growth has slowed across the category. This means that if you're scoring 40%+, you're genuinely in the top tier of SaaS companies - not just meeting an arbitrary threshold.

Q: Does the Rule of 40 apply to pre-revenue or very early-stage SaaS?

No. Without meaningful recurring revenue, there's no growth rate to calculate and the margin figure is just a burn rate. The Rule of 40 is a scaling metric - useful from around $1-3M ARR onwards when you have enough data to identify a trend. At pre-revenue or MVP stage, focus on product-market fit signals, early retention, and unit economics instead.

Enter your revenue growth rate and profit margin to instantly calculate your Rule of 40 score - and see what it means for your SaaS.

The Rule of 40 is a SaaS benchmark stating that a company's revenue growth rate plus its profit margin should add up to at least 40%. It gives founders and investors a single number that balances growing fast against making money. Enter your figures below to calculate your score and see how you compare to current benchmarks.

Revenue Growth Rate YoY %

Year-over-year ARR or MRR growth rate.

Profit Margin EBITDA %

EBITDA margin (negative if pre-profitability).

Your Rule of 40 Score

Your Score

40%

Healthy - Passes the Rule of 40

You're hitting the benchmark. Public SaaS companies scoring above 40% command a median EV/Revenue multiple of 12.4x. Keep the balance.

25%growth +15%margin =40%

What is the Rule of 40?

The Rule of 40 is a widely used benchmark for evaluating the health of a SaaS business. It states that a healthy SaaS company's revenue growth rate and profit margin should add up to 40% or more.

Popularised by venture capitalist Brad Feld, the rule gives investors and founders a single number that balances two things that are often in tension: growing fast andmaking money. A company growing at 60% that loses 10% does not need to worry about profitability yet. A company growing at 15% that is not profitable has a problem.

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

For the growth rate, use your year-over-year ARR or MRR growth. For profit margin, EBITDA margin is standard for private SaaS companies - Free Cash Flow (FCF) margin is preferred by public company analysts because it is harder to manipulate.

12%

Median Rule of 40 score across tracked SaaS companies in Q1 2025.

Most companies fall well below the 40% benchmark - which makes clearing it a genuine competitive signal.

How to interpret your score

The 40% line is the benchmark, but context matters. Here is what different score ranges mean in practice.

Score	Rating	What it means
Below 20%	Struggling	Neither growing fast enough nor close to profitable. Investor appetite will be low and funding will come at a high cost of capital.
20% - 39%	Approaching	Getting closer. Common for early-stage SaaS prioritising growth. A clear path to 40%+ is what investors want to see.
40% - 59%	Healthy	Passes the Rule of 40. Public SaaS companies scoring above 40% command a median EV/Revenue multiple of 12.4x.
60%+	Exceptional	Top-decile SaaS performance. Top public companies like Snowflake and Datadog have historically posted scores of 60-80+.

One important nuance: the rule weights growth and profitability equally, butearly-stage companies are expected to sacrifice margin for growth. A score of 30% driven by 60% growth and -30% margin tells a very different story to a score of 30% driven by 5% growth and 25% margin.

How to improve your Rule of 40 score

There are only two levers - growth rate and margin. Here is where most SaaS founders focus:

Reduce churn before adding acquisition spend
Every churned customer kills growth rate without reducing costs. Improving net revenue retention is the highest-leverage move for most early-stage SaaS - it grows the numerator without touching the denominator.
Move upmarket to improve both levers at once
Larger contracts typically have higher ACVs, lower churn rates, and better gross margins. Moving from SMB to mid-market often improves growth rate and margin simultaneously.
Build expansion revenue into the product
Seat-based pricing, usage-based tiers, and add-on modules generate revenue from existing customers. Net Revenue Retention above 110% can keep your growth rate high even when new logo acquisition slows.
Audit your COGS and hosting costs
Gross margin is the foundation of EBITDA margin. If your hosting and infrastructure costs are consuming more than 20-25% of revenue, that is where the margin work starts - not in headcount.
Build the right product features - and cut the rest
Engineering spend that builds features nobody uses destroys margin without improving growth. Ruthless product prioritisation is often the fastest path to a better Rule of 40 score.

A worked Rule of 40 example

The Rule of 40 is deliberately simple: add your revenue growth rate to your profit margin and compare the total to 40.

Take a SaaS company growing ARR 25% year over year with a 10% EBITDA margin. Its score is 25 + 10 = 35, which sits below the 40 threshold. The business is growing at a reasonable clip but is not yet efficient enough to clear the bar, so the priority is improving margin without sacrificing growth.

Now take a company growing 50% with a -5% EBITDA margin, meaning it is still burning cash. Its score is 50 + (-5) = 45, which clears 40. The heavy growth more than compensates for the small loss, which is exactly the trade-off the rule is designed to reward at earlier stages.

A third company growing 10% at a 35% margin also scores 45 (10 + 35). Same score, very different business: one is a high-growth investment story, the other a profitable, slower compounder. This is why the score is always read alongside the mix of growth and margin that produced it, not in isolation.

Rule of 40 variations

There is no single official formula. The Rule of 40 is a family of closely related calculations, and which one you use depends on the data you have and the audience you are reporting to.

Revenue growth + EBITDA margin
The most common version for private SaaS companies, because EBITDA is straightforward to pull from management accounts and is less sensitive to working-capital timing.
Revenue growth + free cash flow margin
Preferred by public-company analysts because free cash flow (FCF) is harder to manipulate through accounting choices and reflects the cash the business actually generates.
Revenue growth + operating margin
Sometimes used when EBITDA overstates profitability, for example in businesses with heavy capitalised software costs or large stock-based compensation.

On the growth side, you can use either ARR growth or total revenue growth, as long as you are consistent from period to period. ARR growth is the norm for subscription businesses; reported revenue growth is more common in public filings. The key is to pair the growth and margin definitions consistently and to label which version you are quoting, because a company can clear 40 on one definition and miss it on another.

Limitations of the Rule of 40

The Rule of 40 is a useful shorthand, not a verdict. It compresses two very different forces into one number, and that compression hides things you need to look at directly.

It weights growth and margin equally
Investors value durable, efficient growth differently from one-off margin gains, so two companies with the same score can be priced very differently.
It can flatter one-off events
A single period with deferred hiring, a large annual prepayment, or a non-recurring cost cut can lift margin temporarily and push the score above 40 without any change in the underlying business. Always check whether the inputs are repeatable.
It can penalise healthy early-stage burn
A company deliberately investing ahead of revenue may score below 40 while building exactly the growth engine the rule is meant to reward later. Reading the score without the context of stage and strategy leads to the wrong conclusion.

Rule of 40 by company stage

The rule was popularised as a benchmark for SaaS companies at scale, where growth and profitability can reasonably be traded off against each other. It is a poor fit for very early-stage businesses. Pre-Series B and pre-profitability, most companies are investing everything into growth and product-market fit, so a sub-40 score is expected and not a cause for concern on its own. The metric becomes genuinely useful once revenue is large and predictable enough that the balance between growth and margin is a real management choice, typically from Series B onward.