Cash flow runway calculator.
Cash on hand, monthly costs, monthly revenue. See how many months of runway you have — and the date the lights go out if nothing changes.
Your numbers
Monthly figures. Defaults assume a small café in Vienna.
Months of runway
Runway is the number every shop owner should know cold.
Runway is months of cash before you can't pay rent. It's the single most important number when business is shaky — and the easiest to ignore when business is fine, which is exactly when you should be checking it.
The formula
Net burn = monthly costs − monthly revenueRunway months = cash on hand ÷ net burn
How to read your number
Under 3 months: emergency. Cut costs aggressively, raise prices, or arrange a credit line this week. 3 to 6 months: caution. Build a clear plan to either grow revenue or cut costs by month-end. 6 to 12 months: healthy. You have time to make thoughtful decisions. 12+ months: you can invest in growth without sweating.
Why "I'm profitable" doesn't mean "I have runway"
Profitable on the P&L and cash in the bank are different things. A profitable shop with a big tax bill, slow receivables, or a stockup loan repayment can run out of cash anyway. Always check runway on actual bank balance, not on what the P&L says you "should" have.