Prosperify ToolsFree

The Burn Rate Calculator.

Three numbers tell you how long your business can survive at its current pace — and the exact date the runway ends. Every founder should know theirs to the month.

Your cash picture

Bank balances plus anything you can access within days.

What actually lands in the bank each month — not invoiced sales.

Everything: payroll, rent, suppliers, loan payments, CRA remittances, your own draws.

Equipment, a tax bill, a deposit — anything lumpy on the horizon.

Runway

Enter your numbers and press the button.

Reading your number like a CFO

  • Under 3 months: emergency footing. Collections calls, cost cuts, and financing conversations all start this week.
  • 3–6 months: tight. One slow quarter or one big client paying late puts you in the red zone.
  • 6–12 months: workable — but this is when to fix the burn, not when it hits 3 months.
  • Cash-flow positive: no runway limit — your job shifts to building a reserve of 3–6 months of costs.
  • Net burn uses cash, not profit. A profitable business with 60-day receivables can still burn cash. Pair this with the 13-Week Cash Flow Forecast to see the week-by-week picture.