Score your SaaS or startup against the Rule of 40 — enter growth and margin to see your number, your bracket and the growth/margin mixes that still clear 40.
Tip: use a negative profit for a loss-making period. The Rule of 40 is additive, so a deeply negative margin simply subtracts from your growth score.
Mode B answers the trade-off question: given your growth rate, what minimum profit margin do you need for the sum to reach 40? Required margin = 40 − growth.
| Rule-of-40 Bracket | Score Range | What It Signals to Investors |
|---|---|---|
| Laggard | Under 20 | Growth and margin both weak — capital-intensive with no clear path. |
| Below average | 20 – 29 | Needs either a growth reacceleration or a cost reset to be fundable. |
| Approaching | 30 – 39 | Median territory for listed SaaS in 2024–2025 — close, not compliant. |
| Rule-of-40 compliant | 40 – 49 | Clears the standard screen; eligible for premium revenue multiples. |
| Efficient growth | 50 – 69 | Top-quartile profile — a high bar investors apply to strong retention. |
| Elite | 70 and above | Rare combination of fast growth and real profitability. |
Situation: Revenue this period is $12,000,000, last period $8,000,000. EBITDA for the period is −$2,400,000.
Calculation: Growth = ($12,000,000 − $8,000,000) ÷ $8,000,000 × 100 = 50.0%. Margin = −$2,400,000 ÷ $12,000,000 × 100 = −20.0%. Score = 30.0.
Result: Below average — but only because the loss is deep.
Situation: Revenue rises from $8,000,000 to $12,000,000 again (50% growth), but management cuts spend and EBITDA is −$1,200,000.
Calculation: Margin = −$1,200,000 ÷ $12,000,000 × 100 = −10.0%. Score = 50.0% + (−10.0%) = 40.0.
Result: Exactly on the line — the same 50% grower crosses to compliant on ten points of margin.
Situation: A mature subscription business grows 20%, from $20,000,000 to $24,000,000, and produces $4,800,000 of free cash flow.
Calculation: Growth = 20.0%. Margin = $4,800,000 ÷ $24,000,000 × 100 = 20.0%. Score = 40.0.
Result: The mirror image of Example 2 — a different risk profile that clears the identical threshold.
Situation: You forecast 45% growth and want the minimum margin that clears 40. Required margin = 40 − 45 = −5.0%.
Result: At your current −10% margin the score is 35, so margin must improve by five points.
Revenue Now = revenue in the current period (TTM is standard).
Revenue Last = revenue in the comparable prior period.
Profit = the same period's EBITDA, free cash flow or net income — never a blend.
Brackets = <20 Laggard · 20–29 Below average · 30–39 Approaching · 40–49 Rule-of-40 compliant · 50–69 Efficient growth · ≥70 Elite.
| Growth % | Margin % | Score | What That Company Looks Like |
|---|---|---|---|
| 60% | −20% | 40 | Aggressive land-grab; heavy burn funded by investors, needs the market to keep paying up. |
| 50% | −10% | 40 | High-growth, modest burn; the classic venture-backed SaaS profile. |
| 40% | 0% | 40 | Break-even grower; no external funding needed to sustain the pace. |
| 30% | +10% | 40 | Balanced compounder; self-funding with healthy operating discipline. |
| 20% | +20% | 40 | Mature, cash-generative subscription business; lower risk, lower ceiling. |
| 10% | +30% | 40 | Deeply profitable incumbent; growth is optional, cash flow is the product. |
| 25% | +5% | 30 | Non-compliant: mid growth with thin margin — the hardest position to defend. |
All six compliant rows score exactly 40 but carry very different risk. A 60% / −20% company bets on continued market access; a 20% / +20% company bets on retention and pricing power. The rule treats them as equals because it is a screening heuristic, not a quality ranking.
| Public SaaS Quartile | Typical Rule-of-40 Score | Investor Interpretation |
|---|---|---|
| Bottom quartile | Under 20 | Struggling on both axes; often trading at a discount to revenue. |
| Median | Low 30s | Roughly half the listed universe fails the 40 test in any given year. |
| Top quartile | 40+ | Clears the screen; the group premium revenue multiples accrue to. |
In 2024–2025 the median listed SaaS company scored in the low 30s while top-quartile performers cleared 40. From 2022 onward, rate-driven capital markets hardened the 40 line from a nice-to-have into a threshold for premium revenue multiples, and investors commonly apply a higher bar (over 50) to companies with strong retention.
Quarterly spikes flatter or wreck the score. TTM growth and TTM margin give the stable read VCs and boards compare across companies.
Use EBITDA with EBITDA, FCF with FCF, net income with net income. Blending metrics across periods produces a meaningless score.
The absolute number matters less than its trajectory. A score moving from 28 to 36 tells a better funding story than a static 41 with a deteriorating burn.
The Rule of 40 is a venture heuristic popularised around 2015 by investor Brad Feld and the team at Bessemer Venture Partners. The idea is deliberately blunt: take a company's revenue growth rate, add its profit margin, and the total should be at least 40. A business growing 35% with a 5% margin scores 40 and passes. A business growing 10% with a 15% margin scores 25 and fails, even though it is profitable.
It is not an accounting standard, and no regulator enforces it. It is a screening rule — a fast, memorable filter that lets an investor glance at two numbers and decide whether a company deserves a second meeting. Because it is cheap to compute and hard to game with one quarter of cost-cutting, it has spread well beyond venture capital. Growth-stage boards use it to balance a founder's growth ambitions against the finance team's burn warnings. Lenders and private-credit providers increasingly write Rule-of-40 covenants into debt agreements, requiring borrowers to keep a score above a stated threshold or trigger a default. Strategic acquirers use it to sanity-check whether a target's growth is worth the cash it consumes.
What makes the rule durable is its honesty about trade-offs: it says a company must justify itself on the combined axis and leaves the mix to management. Pre-revenue startups cannot use it at all, because with zero revenue the growth rate is undefined and the margin is meaningless.
The Rule of 40 is an additive metric, which is the single most important thing to understand about it: growth and margin are tradeable. Every point of margin you give up by spending harder on acquisition must be paid back in extra growth, and vice versa. That produces a frontier — a family of growth/margin pairs that all score exactly 40 — which is far more informative than any single pass/fail answer.
An aggressive land-grab. The company is buying market share with investor cash and depends on continued access to capital. Its 40 is entirely growth-funded and fragile if funding markets tighten.
The break-even grower. Growth is funded from operations rather than the balance sheet, so the score is resilient to a funding winter — the profile most boards push toward when capital gets expensive.
A mature, cash-generative subscription business. Lower risk and a lower ceiling, but the 20 points of margin are real money that can fund buybacks or acquisitions without an external raise.
Why do a 60% / −20% company and a 20% / +20% company both clear the same bar? Because the rule measures capital efficiency, not quality. The 60% grower consumes cash but compounds revenue quickly; the 20% grower compounds slowly but throws off cash today. Investors price those differently — a high-growth profile gets a higher revenue multiple, a profitable profile a lower but more certain one — yet both pass the screen, and the rule treats them as equals at the filter stage.
Be explicit about the failure mode: a cash-burning company with over 40% growth can still fail if the margin is deeply negative. Growing 45% while losing 30% of revenue scores just 15 — a Laggard. Growth alone does not save you; the loss must be small enough that the sum clears 40.
Most disagreement about the Rule of 40 comes down to one question: which margin? There are three common choices, and they can move a score by twenty points or more. Pick one, disclose which one, and never mix metrics between periods or companies.
Two practical rules follow. First, do not mix metrics: if you compute growth on a TTM basis, compute margin on a TTM basis too, and use the same metric every quarter so the trajectory is meaningful. Blending a cash-flow margin with a calendar-year revenue change produces a number nobody can interpret. Second, state your metric alongside your score — a 42 on FCF is a materially stronger claim than a 42 on EBITDA, and investors will ask which one you used.
ARR is the growth base most SaaS companies quote, but the Rule of 40 is usually applied to recognised revenue, not bookings. Quoting a score on ARR while reporting margin on GAAP revenue is an easily spotted inconsistency — pick one definition and stay with it.
⚠️ Disclaimer: The Rule of 40 is a screening heuristic, not a valuation or investment recommendation. It compresses a business into two numbers and ignores retention, gross margin, customer concentration, debt and the quality of earnings. The brackets and benchmarks shown are illustrative of commonly cited public SaaS ranges, not predictions, and real companies vary widely by metric choice and period. This calculator is for educational and estimation purposes only and is not financial, investment, accounting or legal advice. Consult a qualified professional before making funding decisions.