Entrepreneurship

Runway and Default Alive

The two numbers that should be on every founder's dashboard are months of cash and Paul Graham's sharper question: on your current curve, do you reach profitability before zero?

  • Intermediate
  • 17 min total
  • 12 chapters

What decision this helps you make: Whether your company is default alive or default dead, and what today's decision calendar looks like in each state.

What this topic is

Runway is cash divided by net burn: months until empty at current course. Default alive asks the dynamic version: with revenue growing at its current rate and costs on their current path, does the company reach profitability before the cash runs out?

Why it matters

Graham's observation from watching hundreds of startups: founders systematically don't know which state they're in, discover default-dead too late, and then face the fatal combination: needing money, visibly desperate, out of time. The check takes five minutes; the ignorance costs companies.

Who should learn it

Every founder with monthly costs, bootstrapped or funded, and anyone advising them.

What you will understand

  • Static runway vs the default-alive simulation
  • The decision calendar each state imposes
  • Growth rate as the whole game: small percentage changes, huge outcomes
  • The fatal pattern: discovering default-dead at month four

Prerequisites

Common misconception

"We have 14 months of runway, so we're fine." Runway at FLAT revenue is a countdown, not a status. The question is the race: does growing revenue catch costs before the countdown ends? A company with 14 months and 1% growth is default dead and doesn't know it; one with 8 months and 12% growth may be safely default alive. The static number comforts; the simulation informs.