Cash Runway Calculator
Find your monthly net burn, how many months of cash you have left, and roughly when the balance hits zero if nothing changes.
Formula and method
Net burn = monthly expenses − monthly revenue.
Runway = (cash in the bank − committed one-off costs) ÷ net burn, in months.
If revenue is greater than or equal to expenses the business is cash-flow positive and there is no finite runway; the projection then shows the cash balance growing.
Worked example
€100,000 in the bank, €20,000 of monthly revenue and €30,000 of monthly expenses.
Net burn = €30,000 − €20,000 = €10,000 a month.
Runway = €100,000 ÷ €10,000 = 10 months.
FAQ
Frequently asked questions
What does cash runway actually mean?
How many months your business can keep operating at its current burn rate before the bank balance hits zero, assuming nothing changes.
What is net burn?
Monthly expenses minus monthly revenue. If revenue is higher than expenses, you're cash-flow positive and there's no finite runway to calculate.
Should committed one-off costs go in?
Yes. Put them in the one-off field and they come straight off your starting cash rather than being spread across every month.
How much runway should I have?
No fixed rule, but many early-stage companies aim for twelve to eighteen months so they're not forced into a rushed fundraise.
Does this factor in growth?
No, it assumes flat revenue and expenses. Growing revenue stretches your runway, rising costs shrink it - rerun the numbers whenever your plan changes.
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