Business Finance
Business Burn Rate & Cash Runway Calculator
Compare business cash runway from available cash, monthly receipts and expenses. See net burn and constant-flow assumptions, with local scenario exports.
- 1Set your baseline
- 2Change one assumption
- 3Compare and save
Scenario assumptions
Estimate a business cash buffer using constant recurring income and expenses. This is a steady-state illustration, not a dated cash forecast.
Values are not converted between currencies.
Enter assumptions, then compare both scenarios.
Your scenario results
Calculate both scenarios to see the comparison and a visual explanation.
See the effect of your assumptions
Enter both scenarios and select Compare scenarios. Validated results and visuals appear together.
Cash of 120,000, monthly expenses of 30,000 and monthly revenue of 10,000 imply net burn of 20,000 and six months of runway.
Save and resume locally
Scenario JSON saves names, inputs, currency and conventions for this tool. Import it to resume. Results JSON records the calculation and is not an import format. No automatic saving occurs.
Worked example and interpretation
Cash of 120,000, monthly expenses of 30,000 and monthly revenue of 10,000 imply net burn of 20,000 and six months of runway. Reset restores this example in both scenarios. Other calculation modes use the retained example assumptions.
These deterministic illustrations do not establish credit eligibility, investment performance, statutory compliance or final lender terms. Inspect the formulas and timing conventions before using a result in a decision.
Calculations and scenario files stay in your browser. Financial inputs are not added to navigation links, automatically stored or transmitted by this tool. Downloaded files contain your entered information.
How long does the current cash buffer last at the entered monthly net burn?
- Enter available cash, monthly cash expenses and monthly cash receipts. Use cash received rather than accrued revenue.
- Create a proposed scenario to test an expense reduction, changed receipts or a different cash buffer.
- Compare net burn and runway, then review whether one-off payments or the timing of receipts need a separate dated forecast.
A worked example
Available cash of 120,000, monthly expenses of 30,000 and monthly cash receipts of 10,000 give net burn of 20,000 and six months of constant-flow runway.
Common questions
What is net burn?
Net burn is monthly cash expenses minus monthly cash receipts. When that number is positive, constant-flow runway is available cash divided by net burn.
What happens when receipts cover expenses?
The result says there is no depletion under the constant-flow assumptions. This does not guarantee unlimited liquidity: receipt timing, one-off payments and future changes are outside this illustration.
Is this a cash-flow forecast?
No. It assumes unchanged recurring monthly flows. It excludes dated payment timing, working-capital movements and one-off flows. A business with uneven receipts needs a dated cash forecast as well.
Compare the underlying operating assumptions
If changing prices or variable costs is part of the runway plan, test the contribution and sales volume required to cover fixed costs.
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