Burn Multiple: The One Number That Tells You If Growth Is Worth What It Costs
Growth is not an achievement. Growth per dollar burned is an achievement.
Two companies both grew recurring revenue by a million this year. The first burned 800,000 doing it. The second burned 4 million. On a growth chart they are identical, and in every meeting they will describe themselves the same way. One of them is a business and the other is a subsidy with a logo.
Burn multiple separates them in one line: net burn divided by net new annual recurring revenue. How many dollars did you consume to add one dollar of recurring revenue. The first company scores 0.8. The second scores 4.
Anyone can buy growth. The number that matters is the price you paid for it.
David Sacks popularised the metric and published the bands that most operators now use: under 1 is amazing, 1 to 1.5 great, 1.5 to 2 good, 2 to 3 suspect, and above 3 bad. What makes it powerful is that it is nearly impossible to flatter. It uses net new revenue, so churn is already subtracted. It uses net burn, so every cost is included. Weak pricing, poor retention, an oversized team and inefficient acquisition all land in the same figure, and you cannot fix it with a narrative slide.
Calculate it honestly
Net burn is cash out minus cash in over the period. Include everything: salaries, contractors, tools, marketing, rent, the founder's salary. Net new ARR is the recurring revenue you ended the period with, minus what you started with, so upgrades add and churn subtracts.
Use a quarter, not a month, because a single large payment distorts a month. Then track four quarters in a row, because the trend carries more information than any single reading.
Under 1. You add more recurring revenue than you consume. Spend into this deliberately, because efficiency this good usually means you are underinvesting. 1 to 1.5. Great. Keep the motion, add capacity to the channel that is working, and do not redesign anything. 1.5 to 2. Good. Normal for a company scaling a proven motion. Watch churn, since it is quietly subtracted before you see this number. 2 to 3. Suspect. Something is not paying for itself: a channel, a team, or a segment that churns. Find it by quarter, not by feeling. Above 3. The model is not working at this spend level. Cut what is not attached to revenue this year, and fix retention before adding capacity.
Burn multiple is net burn divided by net new ARR, where net new ARR is new revenue won minus revenue churned. At 450,000 of burn against 400,000 won and 150,000 lost, the multiple is 1.8 on 250,000 of net new ARR. Drag churn to zero and the same burn produces a 1.13 multiple, which is the fastest available improvement in most companies.
Do exactly that experiment with the churn slider. In most businesses, eliminating churn improves the burn multiple more than any plausible cost reduction, because churn is subtracted from the denominator before the division happens. Retention is a growth efficiency lever wearing a customer success uniform.
The Rule of 40, and when it starts applying
The Rule of 40 says growth rate plus profit margin should reach 40. Growing 60 percent at a negative 20 percent margin scores 40. Growing 15 percent at a 25 percent margin also scores 40. It formalises the trade every operator makes intuitively: you may buy growth with margin, but only at a fair exchange rate.
Two honest caveats. It is a benchmark for companies at scale, and applying it to a company with 300,000 of revenue produces nonsense, because a single hire swings the margin twenty points. And it is a summary, not a diagnosis: two companies can both score 40 while one is compounding and the other is quietly stalling. Use it to sanity-check a plan, use burn multiple to run the business.
Sacks' published bands, with the action each one implies. The instruction changes at every level, which is what makes the metric operationally useful rather than merely descriptive. A company at 0.9 that keeps cutting costs is making a mistake as real as one at 3.5 that keeps hiring.
When the number is bad, find out where
A poor burn multiple is a symptom with four common causes, and they need different responses.
Churn is eating the denominator
You are winning plenty and losing nearly as much. Everything you spend on acquisition partly refills a hole. Check net new against gross new: if net is under 60 percent of gross, retention is your efficiency problem, and Day 13 is the work.
One channel is subsidising the others
Blended acquisition cost hides that one channel returns four times its spend while two return nothing. Break spend and revenue down by channel for a single quarter. This is usually an afternoon of work and it usually finds money.
Headcount ahead of the motion
You hired six salespeople before proving one could hit quota, or built a support team for a product still finding its shape. The cost is immediate, the revenue is not, and the multiple registers the gap for several quarters. Hire the seventh person only after the sixth is paying for themselves.
Price is too low
The quietest cause. Every point of price flows straight to net new ARR with no additional cost, which makes it the fastest available improvement to the multiple. If you have not tested price in a year, you have an untested assumption sitting in the denominator.
Open a spreadsheet. Four columns, the last four quarters. Five rows: net burn, gross new ARR, churned ARR, net new ARR, burn multiple. Fill it in this afternoon, from the bank statement and the billing system, not from the forecast. Then look only at the trend in the bottom row. Improving means your decisions are compounding and you should do more of what you did. Flat means you are buying growth at a constant price and should ask whether that price is one you can afford for another year. Worsening means the last two quarters of hiring and spending did not pay for themselves, and the correction gets more expensive every month you postpone it. Put this table in front of your team monthly. It ends more bad arguments than any strategy document.
Efficiency is not austerity
The failure mode on the other side is real. Founders read about capital efficiency, cut everything, and produce a company with a beautiful burn multiple and no growth, which is a slow way to arrive at the same ending.
A burn multiple below 1 with modest growth often means you are underinvesting. If you add a dollar of recurring revenue for 80 cents, you should be looking hard for ways to spend more, because that trade is better than anything available in the financial markets. The right response to excellent efficiency is to press it until it degrades to merely good.
The judgement sits in the interaction between the multiple and your runway. Twenty months of cash and a 1.2 multiple is an invitation to spend. Seven months of cash and a 2.8 multiple is a different conversation entirely, and it needs to happen this week rather than after the next board meeting.
Both companies score 40 and both pass the benchmark, but they are running entirely different businesses. The first needs continued funding and a market that rewards land grabs. The second funds itself and can survive a year with no outside capital. The rule tells you the exchange rate was fair. It does not tell you which trade you should have made.
That distinction decides how you should read your own score. If you pass the rule through growth while burning, your survival depends on the next round existing on acceptable terms, which is a market condition you do not control. If you pass through margin, your survival depends on you. Both are legitimate strategies. Only one of them is a strategy you can execute alone, and founders should know which one they have chosen rather than discovering it during a funding winter.
What to do with the number in a fundraise
Investors ask about efficiency now in a way they did not during cheaper years, and burn multiple is the shortest credible answer to the question they are really asking: does more money produce more company, or just more spending.
Show four quarters, not one. Show the trend and name what caused each move. "We went from 2.9 to 1.6 by killing two channels and raising price 18 percent" is a story about operators. A single flattering quarter with no explanation reads as luck, and experienced investors discount it accordingly.
The same discipline works internally. Attach the multiple to decisions rather than to reporting: before a hire or a campaign, write down what it should do to the number and by when. Most spending inside startups is never evaluated after the fact, and this is the cheapest way to change that.
The takeaway
- Burn multiple is net burn divided by net new ARR. Under 1 is exceptional, above 3 means the model is not working at that spend level.
- It cannot be flattered: churn, pricing, team size and channel efficiency all land in one number.
- Cutting churn usually improves it faster than cutting costs, because churn is subtracted before the division.
- Read it as a four-quarter trend, and pair it with runway before deciding whether to spend or cut.
- A very low multiple with slow growth means you are underinvesting. Efficiency is a means, not the goal.
Frequently asked questions
What is burn multiple?
Net burn divided by net new annual recurring revenue for the same period: how many dollars you consumed to add one dollar of recurring revenue. David Sacks' bands treat under 1 as amazing, 1 to 1.5 great, 1.5 to 2 good, 2 to 3 suspect, above 3 bad. Because it uses net new revenue, churn and pricing are already inside it.
What is the Rule of 40?
Growth rate plus profit margin should total at least 40. Growing 60 percent at minus 20 percent margin passes; so does 15 percent growth at a 25 percent margin. It is a benchmark for companies at scale and produces noise when applied to very small revenue bases.
What is a good burn multiple for an early-stage startup?
Early companies run higher because fixed costs dominate a small base. The trend across three or four quarters matters more than any single reading. Falling from 4 to 2.5 to 1.8 is a strong story. Rising from 1.5 to 3 says recent spending has not paid for itself.
How do I improve my burn multiple?
Cut costs not attached to revenue this year, then work the denominator: reduce churn first, then raise price, then improve conversion. Retention usually moves the number fastest because it is subtracted before you see it.
The growth was real. The price of it was not survivable.
Kill My Startup examines the companies that grew impressively into insolvency, and the metrics that said so early.
Buy on Amazon →Sources
- David Sacks, Craft Ventures, "The Burn Multiple," including the published performance bands.
- Brad Feld and the widely used Rule of 40 benchmark for software companies.
- Standard definitions of net burn, gross and net new ARR, and runway.
- Startup Genome Report Extra on premature scaling.