Most startup metrics measure one slice of the business. Burn Multiple measures the trade every founder makes but rarely names out loud: how much cash you spend to buy a single dollar of new recurring revenue.
It is one number. You burned a certain amount of cash last quarter. You added a certain amount of new ARR. Divide the first by the second and you can see whether that growth was cheap or expensive.
This guide walks through the formula, a worked example with real figures, what counts as a healthy number by stage, and the levers that actually move it. If you raise capital, borrow against your growth, or simply want to keep more of your own company, this is the metric to keep on your dashboard.
What is the Burn Multiple?
David Sacks of Craft Ventures put the Burn Multiple on the map, and the logic behind it is refreshingly blunt. Your net burn already contains every mistake you made this period: a sales team that grew too fast, retention that leaks, a pricing model that gives away margin. Your net new ARR shows what you actually got back for all that spending. Put the two in a ratio and inefficiency has nowhere to hide.
A low number means you grow on a tight cash diet. A high number means each new dollar of revenue cost you a small fortune to win. Same revenue chart on the wall, two very different companies underneath.
How do you calculate the Burn Multiple?
The formula is short:
Burn Multiple = Net Burn / Net New ARR
Two inputs, measured over the same window, usually a quarter or a year:
- Net burn is cash out minus cash in. Not gross spend, but the cash you truly consumed after revenue lands.
- Net new ARR is your ARR at the end of the period minus your ARR at the start. It is net, so churned and downgraded accounts are already subtracted.
That word net does the heavy lifting. A team can sign plenty of shiny new logos and still post weak net new ARR if old customers slip out the back door. The Burn Multiple catches that leak, where a plain new-bookings chart would quietly hide it.
A worked example
Say a Series A company burns 3 million dollars of net cash over a year and grows ARR from 4 million to 6 million. Net new ARR is 2 million. The Burn Multiple is 3 divided by 2, or 1.5x. For every dollar of new recurring revenue, the company spent a dollar fifty of cash. Solid for that stage.
Now take a second company with the same 3 million burn, but it only adds 1 million of net new ARR because half its expansion was eaten by churn. Its Burn Multiple is 3.0x. Same cash out the door, growth that costs twice as much. An investor reading both numbers knows which team built a working engine and which one is paying to fill a leaky bucket.
What is a good Burn Multiple?
Sacks proposed a simple scale that the market still quotes today:
| Burn Multiple | Rating |
|---|---|
| Under 1x | Amazing |
| 1x to 1.5x | Great |
| 1.5x to 2x | Good |
| 2x to 3x | Suspect |
| Over 3x | Bad |
Read it with your stage in mind. A seed company building its first product often runs hot, and a number above 2x can be fine while there is almost no revenue to divide by. Past Series A the expectation tightens. By the growth stage, anything north of 2x invites hard questions, and the strongest operators stay under 1.5x even while scaling fast.
The direction matters more than the snapshot. A 2x burn multiple drifting toward 3x is a warning light. A 2x falling toward 1x is a company that just found its footing.
Burn Multiple, Rule of 40 and CAC payback: how do they fit together?
These metrics answer different questions, so treat them as a set instead of picking one and ignoring the rest.
- Burn Multiple asks how much cash your growth costs right now.
- The Rule of 40 asks whether your growth rate and profit margin add up to a sustainable balance.
- Your CAC payback period asks how long each customer takes to repay what you spent to win them.
- The LTV:CAC ratio asks whether that customer is worth more than they cost over the whole relationship.
Burn Multiple sits one level up. It is the scoreboard; the others explain why the score reads the way it does. A 3x burn multiple almost always traces back to a slow CAC payback, soft retention, or thin gross margin. For how all of these connect, see our guide to SaaS unit economics.
How do you improve a bad Burn Multiple?
There are only two ways to move the ratio: grow net new ARR faster, or burn less cash to get it. Both are worth a hard look before your next raise.
Grow net new ARR
- Plug retention leaks first. Strong net revenue retention turns your existing base into a growth engine and lifts net new ARR with no new acquisition spend.
- Sell expansion. Upsells and added seats land far cheaper than brand new logos.
- Shorten the sales cycle so revenue you book actually shows up inside the period you are measuring.
Cut the burn
- Bring down acquisition cost. A faster CAC payback feeds straight into a lower burn multiple.
- Protect gross margin. Hosting, support and onboarding costs quietly push net burn up.
- Hold the line on headcount and tooling that never touches revenue.
One caution. Do not starve growth just to flatter the number. A company that guts its marketing to post a 1x burn multiple, then watches net new ARR fall off a cliff, has won nothing. The goal is efficient growth, not the absence of spending.
Why your Burn Multiple decides your financing options
Here is where the metric earns its keep for founders who would rather not sell more equity. Capital efficiency is the exact thing a lender or revenue-based financier underwrites. A company that turns one dollar of cash into one dollar of durable ARR can support non-dilutive financing, because the repayments come out of predictable, retained revenue.
A 3x burn multiple sends the opposite message. It says new revenue is expensive and may not stick, which tends to push you toward a dilutive round at the worst possible moment. Drive the number down and your menu widens: venture debt, revenue-based financing, and better terms on the day you do raise equity.
Frequently asked questions
What is a good Burn Multiple for an early-stage startup?
Early on the denominator is tiny, so the ratio swings hard from quarter to quarter. Plenty of healthy seed companies sit between 2x and 3x while they hunt for product-market fit. The trend beats the level here: a number that falls each quarter is the signal investors look for.
Can the Burn Multiple be negative?
Yes, in two very different ways. If you are growing and cash-flow positive, net burn drops below zero and the ratio turns negative in the best possible sense, sometimes called infinite efficiency. If net new ARR is negative because revenue shrank, the ratio also goes negative, and that one is a red flag rather than a trophy. Always read it next to the raw numbers.
How is Burn Multiple different from gross burn?
Gross burn is simply cash going out the door. It ignores both revenue and growth. Burn Multiple ties your spending to the result it produced, which is exactly why it is so much harder to game.
How often should I track it?
Quarterly suits most companies, with an annual view to smooth out lumpy quarters. Measure burn and net new ARR over the same window every time, or the trend stops meaning anything.
Burn Multiple will not run the company for you. What it does is tell you, in one honest number, whether the growth you are buying is worth its price. Watch it, push it down without choking growth, and you keep more of the business along with more of the choices about how to fund it.
