SaaS Cash Flow Calculator

1. Enter opening cash
Use unrestricted cash available at the beginning of the month.

2. Record cash collected
Enter subscription collections and other cash receipts expected during the month.

3. Add operating payments
Include payroll, infrastructure, marketing, and remaining operating cash payments.

4. Enter capital or financing outflows
Include equipment, debt repayment, distributions, or other nonoperating cash uses.

5. Review net flow and runway
Check ending cash and the runway implied by the current monthly burn.

Total cash inflows = Subscription cash collected + Other cash inflowsTotal cash outflows = Payroll + Infrastructure + Marketing + Other operating payments + Capital and financing outflowsNet cash flow = Total cash inflows − Total cash outflowsEnding cash = Opening cash + Net cash flowRunway = Ending cash ÷ Absolute monthly net cash flow, when net cash flow is negative

Where:

• Opening cash — unrestricted beginning cash in dollars
• Cash inflows and outflows — actual or forecast cash movements for one month
• Runway — months of coverage at the entered burn rate

Assumptions: The monthly cash-flow pattern remains unchanged when runway is calculated, and restricted cash is excluded.

What the result means

Runway is highly sensitive to future growth, collections, and spending changes.

Liquidity planning estimate; not accounting or financing advice.

Given:

• Opening cash: $900,000
• Subscription collections: $230,000
• Other inflows: $15,000
• Payroll: $110,000
• Infrastructure: $28,000
• Marketing: $42,000
• Other operating payments: $30,000
• Capital and financing outflows: $20,000

Calculation:
Inflows = $230,000 + $15,000 = $245,000
Outflows = $110,000 + $28,000 + $42,000 + $30,000 + $20,000 = $230,000
Net cash flow = $245,000 − $230,000 = $15,000
Ending cash = $900,000 + $15,000 = $915,000

Result: $15,000 positive monthly net cash flow.

Because the month is cash-flow positive, a burn-based runway is not applicable under this scenario.