Burn multiple

Burn multiple is net burn divided by net new ARR — the number of dollars you burn to add one dollar of recurring revenue. A multiple of 2 means growth is costing you two dollars per dollar of ARR; under 1 means you add more ARR than you burn. It is the efficiency ratio growth investors quote first.

The definition

Burn multiple is net burn divided by net new ARR, both measured over the same period. Net burn is spend minus revenue collected — the gross-versus-net distinction is covered in the burn rate guide. Net new ARR is new business plus expansions, minus contractions and churn: the actual movement of your ARR base. The metric was coined by investor David Sacks, and it stuck because it compresses a whole efficiency conversation into one division.

Compute it over a quarter, or a year — never a single month. Both inputs are lumpy at monthly resolution: a deferred invoice moves the numerator, one deal’s close date moves the denominator, and the monthly multiple whipsaws while nothing real changes. Over a quarter, the noise starts to cancel.

The worked example: a company with $930K of quarterly net burn that added $520K of net new ARR in the same quarter has a burn multiple of about 1.8 — it spent roughly $1.80 of cash for every new dollar of recurring revenue.

What counts as good?

The bands most people quote trace back to Sacks, for venture-scale SaaS:

Treat the bands as widely cited heuristics, not laws. They shift with market conditions — tighter when capital is scarce, looser when it is cheap — and they shift with stage. A seed-stage company’s multiple is mostly noise: the denominator is a handful of contracts, and one close date moves the number more than any operating decision does. A series-B company’s multiple is a headline: at that scale the inputs are stable enough that the ratio actually describes the machine. The example above, at 1.8, sits in “good” — a defensible place to be while growth is being bought deliberately.

Why it beats raw burn in efficiency conversations

Burn alone has no denominator. Tell an investor you burn $310K a month and you have told them your size, not your quality — $310K is aggressive or conservative only relative to what it buys. The same figure is discipline at one company and drift at another, and nothing inside the number distinguishes them.

The multiple supplies the missing denominator: it prices growth in units of burn. It converts “we spend a lot” into “a dollar of spend buys this much recurring revenue,” which is the sentence an efficiency conversation is actually about. It also gives you the honest defense of rising burn — if burn is up and the multiple is flat or falling, spend is scaling with what it buys, and the raw number stops being an accusation. Raw net burn still matters, but for a different question: with cash on hand, it sets your runway — the survival clock. One number for how long you can keep going; the other for whether the going is worth it.

Where the metric misleads

Four failure modes account for most bad readings:

• Tiny denominators. Early-stage net new ARR is small and lumpy. If a quarter that was set to add $240K of net new ARR loses one $120K contract to a slipped signature, the denominator halves and the multiple doubles — with nothing about how the company runs having changed.
• ARR definitions that quietly include services. One-time implementation fees, paid pilots, and professional services inflate the denominator and flatter the multiple. ARR means recurring; a diligence pass will strip the rest out and recompute, so do it first.
• Single-month measurement. One month of data turns both inputs into noise — a strong close flatters you, a slow invoice panics you. The metric only means something over a quarter or more.
• Churn timing games.A cancellation processed a week later lands in next quarter’s denominator instead of this one’s. Consistent recognition rules matter more than any single quarter’s multiple — an inconsistency, once spotted, costs more trust than a bad quarter would have.

Reporting it

Report burn multiple quarterly, alongside net burn — not instead of it. They answer different questions: net burn and cash set the survival clock; the multiple says what the burning bought. An update that swaps the raw number out for the ratio reads as if the raw number had something to hide.

Then keep reporting it. A single multiple is a snapshot; the trend is the story. A 2.4 falling toward 1.8 across three quarters reads better than a lone 1.5 with no history, because the direction shows the machine improving rather than one quarter getting lucky. Same definition, same cadence, every quarter — like every other number in the update.

State the formula the first time you report it — “burn multiple 1.8 (net burn ÷ net new ARR, quarterly)” — so nobody guesses at your definition; looser ones are in circulation. Where the metric sits in the post-A metrics block is covered in investor updates after your series A, and the format around the whole block is in how to write an investor update.

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