Burn Multiple

Burn multiple compares net cash burned over a period to the net new ARR generated in that same period, showing how efficiently a company converts spending into growth. A burn multiple of 1.0x means the company spent exactly $1 to generate $1 of new ARR; lower is more capital-efficient.

David Sacks introduced the term in an April 2020 post, noting that investors scrutinize burn and margins more closely in downturns. He framed it as a flip of Bessemer's Efficiency Score (net new ARR divided by net burn), so that the focus lands squarely on burn: how much the startup burns to generate each incremental dollar of ARR.

The metric gained wider use after the 2022 capital markets correction as investors shifted focus from growth-at-any-cost to capital efficiency, since a company burning heavily to generate modest new revenue is far more exposed in a tighter fundraising environment than one growing efficiently.

Sacks' own rule of thumb is stage-based: a seed company might run around 3x because it has just started selling, dropping to around 2x after the Series A, with expectations tightening further as the sales team scales. He also argued that if growth requires 3x burn or more, product-market fit may not be what it appears to be — the startup is pushing product onto the market rather than the market pulling it.

It works as a catch-all because most serious problems show up in it eventually: a gross margin problem raises burn as the company scales, a sales efficiency problem raises burn relative to new ARR, and churn nets against the denominator. Always pair it with growth rate, though — cutting all spending drives the multiple toward zero while the company stagnates.