What is Runway?

Runway is a fundamental survival metric for startups, representing the amount of time, usually expressed in months, that a company has before it completely exhausts its cash reserves, assuming its current revenue and expense levels remain constant. It is calculated by dividing the company's total current cash balance by its monthly net burn rate. For example, if a startup has ₹2 Crores in the bank and a net burn rate of ₹10 Lakhs per month, its runway is 20 months. For a founder, runway is the "timer" that is always ticking in the background. Understanding and managing runway is essential for strategic planning, especially regarding the timing of future fundraising rounds. Most venture-backed startups aim to maintain a runway of at least 12-18 months, providing enough time to achieve key milestones and initiate their next funding round well before the cash runs out. A short runway (e.g., less than 6 months) indicates an immediate crisis, requiring either drastic cost-cutting or an emergency capital injection. Managing runway involves a constant balancing act between investing aggressively in growth and preserving capital to ensure the company's survival through inevitable challenges and market downturns. It is a key topic in every board meeting.