Runway Math Founders Consistently Miscalculate
The most common runway calculation in startups is also the most dangerous: cash divided by burn.
The formula feels precise, comforting even, because it reduces uncertainty to a single number. Yet startups are not static systems. Expenses shift, revenue fluctuates, payments bunch, and growth decisions alter the trajectory faster than any spreadsheet snapshot can capture. What appears to be twelve months of runway can quietly compress into nine — not because of reckless spending, but because reality rarely behaves like an average.