What Is Burn Rate?
Burn rate measures how quickly a company consumes its cash reserves. The term is most associated with venture-backed startups, which typically operate at a loss for years while they invest in product development and customer acquisition. Because these companies live on finite pools of raised capital, the speed at which that capital burns is a first-order question for management and investors alike.
Analysts distinguish two versions of the metric. Gross burn is total monthly cash spending on payroll, rent, cloud infrastructure, marketing, and everything else. Net burn is gross burn minus cash collected from customers, and it is the figure that actually depletes the bank account. A company with $500,000 of monthly expenses and $200,000 of monthly collections has a gross burn of $500,000 and a net burn of $300,000.
How to Calculate and Benchmark Burn Rate
Net burn equals monthly cash outflows minus monthly cash inflows, measured on a cash basis rather than an accrual basis. That distinction matters because a SaaS company that invoices annual contracts upfront can show accounting losses while burning little cash, whereas a hardware company can post accounting profits while cash sits trapped in inventory. Most teams track a trailing three-month average to smooth out lumpy payments.
Efficiency benchmarks put burn in context. The burn multiple, defined as net burn divided by net new annual recurring revenue, is a popular gauge for software startups: a multiple below roughly 1.5x is considered efficient, while anything above 2.5x to 3x suggests the company is buying growth at an unsustainable price. Acceptable absolute burn scales with stage, from tens of thousands per month at seed to millions at late stage.
Why Burn Rate Matters
Burn rate feeds directly into runway, since cash on hand divided by net burn tells a company how many months it has left. It also shapes strategy. When capital is cheap, boards tolerate high burn to win markets quickly; when funding tightens, as it did after 2021, the same boards demand burn cuts, and startups that reduced spending early avoided the layoffs and down rounds that hit slower movers.
In venture capital and growth equity interviews, burn analysis is a standard diligence exercise. A strong candidate can decompose a company's burn into headcount and non-headcount drivers, judge whether spending is producing efficient growth using measures like the burn multiple, and articulate how a proposed financing changes the company's trajectory. Understanding burn shows you can read a startup the way an investor does.
