Runway

Runway is the number of months a startup can continue operating before it runs out of cash, given its current net burn rate. It is calculated by dividing the company's current cash balance by its monthly net burn. For example, a company with $900,000 in the bank and a net burn of $75,000/month has 12 months of runway.

Runway is critical context for any fundraising conversation. Investors want to know how much time the current raise buys, and what milestone the company will reach before needing to raise again. The ideal raise extends runway to a clear, defensible milestone — typically 18–24 months of post-raise runway — that justifies the next round at a meaningfully higher valuation. The standard framing for an investor is: "We're raising $X to get to milestone Y in Z months, which positions us to raise the next round at $A valuation." If any of those numbers don't connect, the raise narrative falls apart.

Founders should start raising a new round when they have 6–9 months of runway remaining. Raising too late — with less than 4 months of runway — puts founders in a weak negotiating position, signals poor financial planning to investors, and triggers concerns about the company's ability to weather diligence delays or term sheet renegotiations. Founders who wait until they have 2 months of runway often accept worse terms because they have no walk-away alternative.

Runway should be calculated against current burn, not projected burn. A common pitch deck mistake is showing runway calculated against an optimistic future burn rate that assumes revenue growth will offset expense growth. Investors back out these calculations and ask for the runway against today's burn. Honest founders show both — current runway and projected runway under stated revenue assumptions — and identify the cash-out date under each scenario.

Three categories of milestones extend runway value: product milestones (working MVP, key integrations shipped, a specific feature unlock that opens a new market), commercial milestones (named customers, ARR thresholds, repeatable sales motion proven), and traction milestones (active user counts, retention curves flattening, NPS thresholds met). The strongest fundraising narratives connect runway directly to one or two specific milestones — not a vague "extend the team and grow revenue" plan. Investors fund clarity; they discount vague runway plans.

In a pitch deck, runway projections should be honest and grounded in realistic assumptions about hiring pace, customer acquisition costs, and revenue growth. Pad assumptions by 20–30% on burn and discount revenue projections by a similar amount — investors will do this anyway, and showing you've already accounted for variance signals operational maturity.