What is Cash Runway?

Cash runway is the number of months of operation remaining at the current burn rate and is the single most important survival metric for an unprofitable company. It dictates how much time there is to reach profitability or raise more capital. Assuming burn stays flat as the company scales is a frequent mistake that shortens real runway. For context, 18+ months is comfortable immediately after a raise; below 6 months is a clear signal to begin fundraising or cut costs. Treat an external benchmark as a reference point rather than a universal target: company stage, sector, customer mix, pricing model and measurement definitions can materially change what “good” looks like. Read Cash Runway alongside Burn Rate and Free Cash Flow; together these measures provide a more balanced view and reduce the risk of optimizing one number at the expense of the wider outcome.

Make sure the numerator and denominator cover compatible populations and periods, and avoid dividing by a partial or unusually small base. Reconcile the inputs to the relevant ledger or approved reporting schedule and apply the same accounting policy and period cut-off. Keep the accounting policy, reporting period and treatment of exceptional items consistent, then compare the result with prior periods, the operating plan and genuinely comparable peers. A dashboard should show the current value, prior-period comparison and a trend rather than presenting one isolated reading.

Management can improve the result by tracing it to operational drivers—price, volume, mix, direct cost, overhead, working capital or capital structure—and assigning actions to the driver rather than the headline ratio. Common pitfalls: assuming burn stays flat as you scale. Record the definition beside the dashboard, review it when systems or processes change, and annotate unusual events so future readers can distinguish a genuine performance shift from a data or timing effect.