A handful of metrics dominate SaaS board conversations and diligence calls. Most founders can define them roughly. Very few can defend the exact number they reported last quarter when an associate pulls the spreadsheet apart. The gap between "I know what this means" and "I can reconcile this to the general ledger" is where fundraises stall.
This guide covers the three metrics that matter most -- burn multiple, Rule of 40, and net new ARR -- with formulas, benchmarks by stage, and the definitional traps that most commonly create reconciliation problems.
Why These Three
Pre-2022, growth was the dominant metric. ARR growth rate alone could justify a valuation. Post-2022, capital efficiency came back into focus. The three metrics below became the triangulation every investor uses:
- Net new ARR measures the top-line growth engine.
- Burn multiple measures how much cash you are burning per dollar of that growth.
- Rule of 40 combines growth and profitability into a single number for direct comparison.
Together they answer the questions every board and investor wants answered: how fast are you growing, how efficiently are you growing, and are you on a path to profitability?
Net New ARR
Definition
Net new ARR is the change in annual recurring revenue over a period, typically a quarter.
Formula:
Net New ARR = New ARR + Expansion ARR - Churned ARR - Contracted ARR
Where:
- New ARR: new logos signed in the period
- Expansion ARR: increases from existing customers (upsell, cross-sell, usage overages that convert to committed)
- Churned ARR: existing customers who stopped subscribing
- Contracted ARR: existing customers who downgraded
The Definitional Traps
The formula looks simple. In practice, every component requires a precise definition.
What counts as "new"? A customer who signed in Q4 but does not activate until Q1 -- when is their ARR counted? The defensible answer: when the subscription start date begins, not when the contract is signed. Using contract signing inflates bookings into revenue periods.
What is "committed" ARR? Usage-based contracts with no minimum are not ARR in the strict sense. They are variable revenue. Including them inflates ARR and creates reconciliation problems when usage shifts.
How do you handle multi-year contracts? A 3-year contract at $100K per year is $100K of ARR, not $300K. The ARR number reflects the annualized recurring revenue, not the total contract value.
What about annual contracts paid monthly? A $60K annual contract billed monthly is $60K of ARR from the start date. ARR does not wait for billings to catch up.
Benchmarks
Quarterly net new ARR growth rates by stage, for SaaS companies tracking toward top-quartile outcomes. To model where your net new ARR is heading over the next 24 months, use our free SaaS revenue forecast tool.
| Stage | Typical Net New ARR Growth |
|---|---|
| Pre-seed / seed | 10-30% quarter-over-quarter |
| Series A | 15-25% quarter-over-quarter |
| Series B | 10-20% quarter-over-quarter |
| Series C | 7-15% quarter-over-quarter |
These are top-quartile numbers. Median is meaningfully lower at each stage. Investors expect top quartile to justify venture-scale outcomes.
The Common Mistake
Presenting ARR without disaggregating the components. "We added $1M of net new ARR this quarter" is much less useful than "We added $1.4M of new logo ARR, $200K of expansion, with $400K of churn and $200K of contraction."
The disaggregated version lets you diagnose: is growth coming from new customers or expansion? Is churn manageable or elevated? Investors will ask for the disaggregation. Bring it first.
Burn Multiple
Definition
Burn multiple was popularized by David Sacks in 2020 as a measure of capital efficiency. It answers: "How much cash are you burning for each dollar of new ARR?"
Formula:
Burn Multiple = Net Burn / Net New ARR
Where:
- Net burn: operating cash burn in the period (negative operating cash flow, or equivalently: cash in minus cash out, excluding financing activities)
- Net new ARR: as defined above
Both numerator and denominator are measured over the same period, typically a quarter or year.
What the Number Means
A burn multiple of 2.0 means you are burning $2 in cash for every $1 of new ARR you add. A burn multiple of 0.5 means you are burning $0.50 per dollar of new ARR -- highly efficient growth. To see how your current burn translates to months of cash remaining, plug your numbers into our free runway calculator.
Benchmarks
David Sacks' original framework, still widely referenced in 2026:
| Burn Multiple | Quality |
|---|---|
| Under 1.0 | Amazing |
| 1.0 to 1.5 | Great |
| 1.5 to 2.0 | Good |
| 2.0 to 3.0 | Suspect |
| Over 3.0 | Bad |
Stage matters. A pre-revenue company cannot have a meaningful burn multiple. Very early seed companies may have high burn multiples that are acceptable because absolute numbers are small. The framework becomes meaningful from Series A forward.
The Definitional Traps
What counts as "burn"? Operating cash burn, not cash consumption including financing activities. If you raised $10M in a quarter and spent $2M, your net burn is $2M, not negative $8M.
Quarterly or annual? Both are used. Quarterly is more sensitive to seasonality. Annual is more stable but slower to detect changes. Report both.
What about non-recurring expenses? One-time costs (moving offices, a single large legal bill, restructuring) can distort a single quarter. Normalize by reporting both reported and normalized burn multiple.
Revenue vs. ARR. Some practitioners use revenue growth instead of ARR in the denominator. The original formulation uses ARR. Using revenue produces a different number, especially for usage-based businesses.
When Burn Multiple Is Misleading
In the first 6-12 months after launch. ARR is too small for the ratio to be stable.
During a transition between pricing models. A move from monthly to annual contracts temporarily inflates ARR while cash stays flat, artificially improving the multiple.
For non-SaaS business models. The metric was designed for subscription SaaS. Marketplaces, transactional businesses, and services companies need different frameworks.
Rule of 40
Definition
The Rule of 40 states that a healthy SaaS business should have growth rate plus profit margin totaling at least 40 percent.
Formula:
Rule of 40 = Revenue Growth Rate (%) + Profit Margin (%)
What the Rule Says
A company growing 60 percent year-over-year with a -20 percent margin passes (60 + (-20) = 40). A company growing 20 percent with a 25 percent margin passes (20 + 25 = 45). A company growing 100 percent with a -80 percent margin fails (100 + (-80) = 20).
The intuition: investors accept unprofitable growth as long as growth is meaningful. They accept modest growth as long as profitability is meaningful. The combination that fails is slow growth at low or negative margins.
Which Profit Margin?
Three common variants, each with implications:
EBITDA margin. The original formulation. Easy to compare across companies but excludes stock-based compensation, which is large in tech.
Free cash flow margin. Increasingly used by public-market investors. More conservative than EBITDA.
Operating margin. Less common but sometimes used to avoid cash/accrual timing issues.
For most private companies, EBITDA margin is the standard. Report the variant explicitly when you cite your Rule of 40 number.
Benchmarks
| Rule of 40 Score | Quality |
|---|---|
| Over 60 | Elite |
| 40 to 60 | Strong |
| 20 to 40 | Acceptable at early stage |
| Under 20 | Concerning |
Top public SaaS companies typically score 50 to 80. Private Series A and B companies often score lower due to heavier burn during growth investment.
The Definitional Traps
Which growth rate? Year-over-year revenue growth is standard. Using ARR growth instead of revenue growth produces slightly different numbers, especially during pricing-model transitions.
Which margin? As above. Be explicit.
Quarterly or annualized? Rule of 40 is typically annualized to smooth quarterly noise.
How the Three Connect
The three metrics tell a complete growth story:
- Net new ARR tells you the engine is working (or not).
- Burn multiple tells you the engine is efficient (or not).
- Rule of 40 tells you the engine is sustainable (or not).
A company with strong net new ARR but a terrible burn multiple is growing but unsustainably. A company with a good Rule of 40 but declining net new ARR is profitable but stalling. Only all three together paint a complete picture. If you also want to check the other side of the equation -- how efficiently you acquire each customer -- work through CAC, LTV, and payback in our free unit economics calculator.
What to Track in Your Board Pack
A well-constructed SaaS board pack includes all three metrics, updated monthly or quarterly:
- Net new ARR disaggregated into new, expansion, churn, and contraction.
- Burn multiple for the current quarter and trailing twelve months.
- Rule of 40 calculated using the explicit definitions you are using.
Alongside each, the numerator and denominator should be visible. Investors do not want to trust your summary -- they want to verify the math.
Common Mistakes
Citing the metric without defining the components. "Our burn multiple is 1.8" is not useful if the next question -- "over what period, using what definition of burn?" -- produces an uncertain answer.
Switching definitions between periods. If Q1 used EBITDA for Rule of 40 and Q2 used free cash flow, the trend is meaningless. Pick definitions and stick to them.
Ignoring stage-appropriate context. A Rule of 40 score of 15 at a pre-seed company is fine. At Series B, it is a red flag. Context matters more than the raw number.
Cherry-picking quarters. A single quarter's burn multiple can be misleading. Investors look at trailing twelve months for a reason. Report the trailing figure alongside the quarterly one.
How We Handle These Metrics for Clients
ClariFi tracks all three metrics automatically for every SaaS client, with the underlying ARR waterfall, burn calculation, and Rule of 40 breakdown visible in the board pack with one click. The definitions are fixed per company and documented in the methodology notes attached to every board pack -- so there is never a question about what "net new ARR" means at your company.
If you cannot currently answer "what is your burn multiple, using what definition" without opening three spreadsheets, that is a signal. Book a free consultation and we will show you what the automated version looks like for your books.
