What is Runway?

Runway is the number of months your business can keep operating before the money runs out, at your current burn rate. If you have $50,000 and spend $10,000 a month, you have five months of runway.

It's the single most important number for any business burning more than it earns. When runway gets short, you have three moves: make more money, spend less, or raise more — fast.

Founders track runway like a fuel gauge on a long drive with no gas stations. Watching it hit zero by surprise is how good companies die.