Analysis / Finance and cash planning
Calculate cash runway under different scenarios
Use Proforma to calculate cash runway under different scenarios. Produce monthly runway scenarios and cash-floor sensitivity table from your business data.
Finance lead · Founder
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Your starting prompt.
Calculate our cash runway from [date] under base, slower-sales and reduced-spend scenarios. Use actual cash receipts and payments to establish a starting burn rate, then apply the supplied hiring and financing assumptions. Show monthly ending cash, the minimum cash point and the date each scenario reaches [cash floor]. Separate confirmed cash flows from assumptions and exclude restricted cash from available funds.
Copy this starting point, then replace the placeholders with your own inputs.
Method and review
Keep the assumptions visible.
Start with opening cash and dated receipts and payments. Separate recorded cash movements from forecasts, and show which assumptions change the result.
For this task, check
Runway depends on collection timing and excludes financing that has not been explicitly assumed.
Before you begin
- Uploaded exports or permitted Data covering the listed inputs
Work with permitted files or queryable data. Verify the result against the original records.
Synthetic illustrative example
See the method in practice.
Synthetic input. Illustrative output checked locally; this is not a live Proforma run or customer result. Starting unrestricted cash is $300,000, cash floor $0; constant monthly flows exclude hiring, financing and one-time changes.
These invented records explain the method. They are not a recorded Proforma run.
| Scenario | Cash receipts / month | Payments / month |
|---|---|---|
| Base | $50,000 | $80,000 |
| Slower collections | $40,000 | $80,000 |
| Reduced spending | $50,000 | $70,000 |
| Scenario | Net burn / month | Months to floor | Cash after 3 months |
|---|---|---|---|
| Base | $30,000 | 10 | $210,000 |
| Slower collections | $40,000 | 7.5 | $180,000 |
| Reduced spending | $20,000 | 15 | $240,000 |
Method
Net burn = payments − receipts. Constant-flow runway = (unrestricted cash − floor) / positive net burn. Monthly ending cash = opening cash − month × burn. Fractional months approximate continuous spending, not a dated bank forecast.
What the result tells you
Base burn is $30,000 per month. Slower collections shorten the estimate from 10 to 7.5 months; reduced spending extends it to 15. Replacing constant flows with dated commitments may change all three estimates.
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Make it your investigation.
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