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Business Cash Runway Calculator

See how long current cash can support a business at its present net burn rate.

Business Cash Runway Calculator estimate

Enter values, then calculate.

How the estimate works

Monthly burn equals operating expenses minus recurring revenue. Runway divides usable cash by positive monthly burn.

Worked example

Example: $45,000 of usable cash and a $6,000 monthly net burn provides approximately 7.5 months of runway.

Important limitation

Collections timing, seasonality, taxes, debt service, inventory purchases, and unexpected spending can change actual runway. Results are estimates only and are not financial, lending, legal, tax, or investment advice.

Assumptions and review

Formula review: July 29, 2026. This tool uses only the editable values shown above and does not pull live rates, prices, balances, or account data.

Compare all Fair Calcs tools.

Frequently asked questions

How does the business cash runway calculator work?

Monthly burn equals operating expenses minus recurring revenue. Runway divides usable cash by positive monthly burn.

Is this business cash runway calculator exact?

No. It is a planning estimate based on the values you enter. Actual rates, fees, timing, taxes, and provider rules can change the result.

Can I change the assumptions?

Yes. Every displayed input is editable so you can compare scenarios instead of relying on a hidden default.