The Rule of 40 remains the single most popular shorthand for evaluating a SaaS company.
It captures, in one number, the trade-off every SaaS operator and investor obsesses over: how fast can you grow, and how much money do you actually keep? A business that combines its revenue growth rate with its profit margin to clear 40% is generally considered to be balancing growth and profitability efficiently. Anything below that threshold suggests a company is either growing too slowly for its level of investment or burning too much cash to justify its growth.
This article walks through how the Rule of 40 is calculated, where today’s listed SaaS universe actually sits, which companies sit at the top and bottom of the table, and how the metric translates into EV/Revenue valuation multiples.
All numbers below are based on a sample of 55 publicly listed SaaS companies as of 5 May 2026.
What is the Rule of 40 and how is it calculated?
The formula is deceptively simple:
Rule of 40 = Revenue Growth Rate (%) + Profit Margin (%)
The disagreement starts with what to put into the second term. In practice, two definitions dominate:
- EBITDA-based Rule of 40: uses the EBITDA margin. This is the version most often quoted in earnings calls and broker research because EBITDA is reported and easy to compare.
- Free-cash-flow-based Rule of 40: uses the FCF margin (operating cash flow minus capex, divided by revenue). FCF is harder to manipulate, but it adds back stock-based compensation, so is generally higher for younger companies.
A typical example: a SaaS business growing revenue 25% with a 20% FCF margin scores 45 on the FCF basis and clears the bar. The same company might only show a 5% EBITDA margin (because GAAP EBITDA is dragged down by stock-based comp), giving an EBITDA-based Rule of 40 of 30: well below the threshold. Both numbers are “right”.
Methodology: the 2026 SaaS universe we analysed
The dataset covers 55 publicly listed SaaS companies with last-twelve-month financials as of 5 May 2026. Inclusion criteria were a pure or near-pure SaaS business model, listing on a major U.S. or Canadian exchange, and an enterprise value above $350m (the smallest constituent, Sprout Social, sits at $362m EV). The largest, Salesforce, has an enterprise value of $161bn. Median enterprise value across the sample is $5.8bn, so this is a universe of mid- and large-cap names rather than micro-caps.
Geographically, 48 of the 55 companies are U.S.-listed, with three Canadian (Shopify, Descartes, Lightspeed), three Israeli (NICE, Wix, monday.com) and one Australian (Atlassian) name in the mix. Average gross margin across the sample is 73%, confirming that this is a true software cohort rather than a mixed software/services universe.
Across the full sample, the headline numbers are:
- Mean revenue growth: 15.1%
- Mean EBITDA margin: 7.3%
- Mean FCF margin: 23.0%
- Mean Rule of 40 (EBITDA basis): 22.4% (median 22.6%)
- Mean Rule of 40 (FCF basis): 38.0% (median 39.1%)
- Mean EV/Revenue multiple: 4.7x (median 3.6x)
Currently, only 8 of 55 companies (15%) clear the Rule of 40 on an EBITDA basis.
The bar is much easier on the FCF basis, where 25 of 55 (46%) get over 40. The gap between the two definitions, roughly 16 percentage points at the median, is explained almost entirely by stock-based compensation, which depresses EBITDA but rarely shows up in cash flow.
Whether stock-based compensation is a true business cost is a topic of many discussions. I tend to lean to the opinion that it is. FCF doesn’t capture the share buybacks that many companies perform to keep number of shares and dilution under control.
Rule of 40 of the top 5 SaaS firms by market cap
The five largest listed SaaS businesses by enterprise value account for over $670bn of combined market value, roughly 60% of the entire sample. Their Rule of 40 numbers tell a varied story:
| Company | EV ($bn) | Rev. Growth | EBITDA Margin | FCF Margin | R40 (EBITDA) | R40 (FCF) |
|---|---|---|---|---|---|---|
| Salesforce | 161.1 | 9.6% | 30.2% | 39.4% | 39.8% | 49.0% |
| Palo Alto Networks | 145.1 | 15.4% | 15.5% | 28.9% | 31.0% | 44.3% |
| Shopify | 134.1 | 31.8% | 17.4% | 10.0% | 49.2% | 41.9% |
| CrowdStrike | 116.9 | 21.7% | -1.0% | 33.3% | 20.7% | 55.1% |
| Intuit | 114.1 | 17.2% | 30.4% | 26.3% | 47.6% | 43.6% |
Four of the five mega-caps clear the Rule of 40 on at least one definition; only Palo Alto Networks falls short on the stricter EBITDA basis. CrowdStrike is the most dramatic example of the EBITDA-vs-FCF gap: its GAAP EBITDA margin is essentially zero, but its FCF margin of 33% drags its FCF-based Rule of 40 to 55%, among the highest in the entire sample.
These and similar businesses are also the businesses that effectively defined the benchmark in the first place: Salesforce, Adobe, Intuit, ServiceNow and their peers were the prototype SaaS franchises whose financial profiles inspired Brad Feld’s original 2015 framing of the Rule of 40, and they remain the reference set every public and private SaaS company is implicitly measured against today.
Top 10 SaaS companies by Rule of 40 (EBITDA basis)
| # | Company | Rev. Growth | EBITDA Margin | R40 (EBITDA) | EV/Revenue |
|---|---|---|---|---|---|
| 1 | Clearwater Analytics | 61.9%* | 11.8% | 73.7% | 10.8x |
| 2 | Descartes Systems | 12.0% | 42.2% | 54.2% | 8.1x |
| 3 | Adobe | 11.0% | 38.9% | 49.9% | 4.2x |
| 4 | Shopify | 31.8% | 17.4% | 49.2% | 10.8x |
| 5 | Intuit | 17.2% | 30.4% | 47.6% | 5.7x |
| 6 | Autodesk | 17.5% | 26.5% | 44.0% | 7.3x |
| 7 | ServiceNow | 21.7% | 20.7% | 42.4% | 6.4x |
| 8 | The Trade Desk | 18.5% | 23.8% | 42.3% | 3.7x |
| 9 | Paycom Software | 8.9% | 30.9% | 39.9% | 2.9x |
| 10 | Salesforce | 9.6% | 30.2% | 39.8% | 3.9x |
The leaderboard is dominated by mature names that have shifted from “growth at all costs” to disciplined profitability. Most of the companies clear the hurdle by strong profitability rather than strong growth, natural for the leading companies.
Clearwater Analytics is the outlier, combining 62% revenue growth (mostly due to acquisitions) with double-digit EBITDA margins. The median EV/Revenue multiple of this top-10 group is 6.1x, almost 1.7x the median of the full sample.
Top 10 SaaS companies by Rule of 40 (FCF basis)
| # | Company | Rev. Growth | FCF Margin | R40 (FCF) | EV/Revenue |
|---|---|---|---|---|---|
| 1 | Clearwater Analytics | 61.9% | 23.9% | 85.8% | 10.8x |
| 2 | ServiceNow | 21.7% | 36.6% | 58.3% | 6.4x |
| 3 | Zscaler | 23.9% | 34.0% | 57.9% | 7.0x |
| 4 | Autodesk | 17.5% | 38.7% | 56.2% | 7.3x |
| 5 | CrowdStrike | 21.7% | 33.3% | 55.1% | 24.3x |
| 6 | Datadog | 27.7% | 25.7% | 53.3% | 14.2x |
| 7 | SentinelOne | 21.9% | 28.4% | 50.2% | 4.8x |
| 8 | Adobe | 11.0% | 38.1% | 49.1% | 4.2x |
| 9 | Salesforce | 9.6% | 39.4% | 49.0% | 3.9x |
| 10 | Braze | 24.4% | 24.2% | 48.6% | 3.3x |
The FCF-based leaderboard is more diversified: security platforms (CrowdStrike, Zscaler, SentinelOne), observability (Datadog) and customer engagement (Braze) all appear, alongside the mature horizontal SaaS giants. The median EV/Revenue multiple here is 7.2x, almost double the universe median.
Bottom 10 SaaS companies by Rule of 40
The bottom of the table reveals a different pattern: companies still struggling to translate growth into either accounting profit or cash. The two lists below show the worst performers on each definition.
| # | Company (EBITDA basis) | R40 | EV/Rev | Company (FCF basis) | R40 | EV/Rev |
|---|---|---|---|---|---|---|
| 1 | C3.ai | -163.6% | 2.6x | C3.ai | -12.5% | 2.6x |
| 2 | Asana | -9.7% | 2.0x | EverCommerce | 16.4% | 4.0x |
| 3 | SentinelOne | -4.9% | 4.8x | Blackbaud | 17.4% | 2.5x |
| 4 | Sprout Social | 6.2% | 0.8x | Lightspeed | 18.1% | 0.7x |
| 5 | Braze | 7.6% | 3.3x | Rapid7 | 18.4% | 0.9x |
| 6 | Rapid7 | 7.8% | 0.9x | BILL Holdings | 19.7% | 2.2x |
| 7 | Lightspeed | 10.6% | 0.7x | Paycom | 21.7% | 2.9x |
| 8 | Intapp | 11.3% | 3.2x | Sprinklr | 24.3% | 1.0x |
| 9 | BILL Holdings | 11.7% | 2.2x | NICE | 24.9% | 2.3x |
| 10 | ServiceTitan | 14.6% | 5.9x | BlackLine | 25.9% | 3.0x |
The same names, C3.ai, Lightspeed, Rapid7, Sprinklr, Sprout Social, recur across both lists and trade at the lowest EV/Revenue multiples in the sample (0.7x to 1.0x). The market is unambiguous: failing the Rule of 40 on cash flow effectively caps the multiple a SaaS business can earn.
Rule of 40 vs EV/Revenue multiples: the correlation
Across the 55-company sample, the relationship between the Rule of 40 and EV/Revenue is statistically meaningful. Using the full universe, the correlation is 0.49 on the FCF basis and 0.23 on the EBITDA basis.
After dropping seven outliers, most of them companies trading on growth narratives well outside the linear band (Shopify, Palo Alto Networks, CrowdStrike, Datadog, Clearwater Analytics, Asana and C3.ai), the relationships tighten meaningfully:
- FCF-based Rule of 40 vs EV/Revenue (n=49): Each additional 10 percentage points of Rule of 40 (FCF) is associated with roughly +1.0x on the EV/Revenue multiple.
- EBITDA-based Rule of 40 vs EV/Revenue (n=48): Each additional 10 percentage points of Rule of 40 (EBITDA) maps to roughly +0.7x on the multiple.
The split between Rule of 40 “passers” and “failers” is starker than the regressions suggest. SaaS companies that clear the Rule of 40 on an FCF basis trade at a median 4.8x EV/Revenue, versus 2.7x for those that fail, a 74% premium.
What this means for SaaS founders, operators and investors
Three takeaways stand out from the 2026 numbers.
First, the Rule of 40 still works as a filter: passing it correlates strongly with higher revenue multiples even after stripping out the most extreme growth outliers.
Second, the FCF version is the better predictor for the current market, although it is easier to clear than EBITDA. It is just more aligned with how investors evaluate the businesses.
Third, the bar for true SaaS premium valuations is higher than 40: the names trading above 7x EV/Revenue are concentrated among companies clocking 50%+ Rule of 40 on FCF, not just clearing the threshold.
For management teams, the practical implication is clear. Rather than optimising for either pure growth or pure margin, the most valuable SaaS businesses in 2026 are those that combine 20%+ revenue growth with 25%+ FCF margins — and the data shows the market is willing to pay a meaningful premium for that combination.
Data sources: company filings, S&P Capital IQ, Aventis Advisors analysis. As of 5 May 2026.
