How long will your cash last?
Your runway in months, the month the cash runs out, and whether you'd break even first.
Your runway
Lasting
Your cash lasts beyond five years at these growth rates, and money in overtakes money out in month 17.
How it works.
Each month, cash changes by money in minus money out. Both grow by the rates you set. Runway is the month the cash would go below zero, worked out to part of a month. Break-even is the first month money in covers money out.
What it leaves out.
One-off costs and payments, tax bills, seasonal months, and customers leaving. Real revenue rarely grows at a steady rate. Use it for a first answer, then test it against your own numbers.
How do I calculate my runway?
Divide your cash in the bank by your monthly net burn (money going out minus money coming in). £30,000 of cash with £2,500 more going out than coming in each month is 12 months of runway. If revenue is growing, step through month by month instead, as this calculator does.
What is a good runway for a startup?
Many founders aim for 12 to 18 months, so there's time to reach profit or raise money without rushing. Under 6 months is usually the point to act: cut costs, raise prices or start fundraising.
What does default alive mean?
A business is default alive if, at its current growth and costs, it reaches profit before the cash runs out. If money in overtakes money out before your runway ends, you're default alive.
Track your real runway, every day.
Scenario works out your runway from your own numbers, keeps it up to date, and lets you test a hire or a price rise before you make it.
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