B/Billable Toolkit
Free calculators for freelancers & small businesses
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Cash Runway Calculator

Know how long your cash lasts at today's spending. Useful before a slow season, a big purchase or quitting a job.

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Runway

How it’s calculated

Burn is expenses minus revenue. Runway is cash divided by burn. If revenue covers expenses, the business is not burning cash at all.

burn = expenses − revenue runway = cash ÷ burn

Worked example

$18,000 in the bank with $4,200 of monthly revenue and $6,100 of monthly expenses burns $1,900 a month, which is about 9.5 months of runway.

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Questions

How much runway should a small business have?

Many advisers suggest at least 6 months of expenses in reserve, and 12 months before a risky change.

How can I extend my runway?

Cut the largest expenses first, bring payments forward with deposits, and chase overdue invoices.

Doing these numbers every month? Accounting software can automate invoices, reminders and tax reports.

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