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Startup runway & founder finances

How much time does my cash really buy?

Runway is a description of a cash scenario. It changes when customers pay late, expenses arrive early, or the founder needs money from the business. A company bank balance and a household bank balance answer different questions.

Keep the two forecasts separate and connect them through an explicit founder payment. Use the calculator for a first estimate, then check actual cash timing in a forecast. These resources focus on the decisions a cash number should inform: what to test next, which commitments remain affordable, and when to reopen the plan.

Questions worth answering

  • Which cash is available, and which is already committed?
  • How does the forecast change if the next payment arrives late?
  • What decision needs to happen before cash runs out?

Start here

How to calculate startup runway without hiding the assumptions

Calculate cash runway, distinguish gross from net burn, and stress-test customer payments and founder expenses.

Read the guide and use the worksheet →

Use your own numbers

From the field

Personal accounts behind the questions. Each essay reflects when it was written.