SaaS Burn Rate & Cash Runway Calculator for 2026
Calculate your gross burn, net burn, cash runway in months, and Burn Multiple to see exactly how long your startup's cash will last.
How Burn Rate & Cash Runway Are Calculated
Gross burn is your total monthly cash outflow. Net burn subtracts incoming revenue. Runway divides your cash balance by net burn to show how many months you have left at the current spending pace.
If Net Burn Rate is zero or negative, the company is cash-flow positive and runway is effectively infinite. Burn Multiple under 1x is considered excellent capital efficiency, 1x–2x is acceptable, and above 2x signals inefficient spending relative to growth.
How to Use the Burn Rate & Cash Runway Calculator
Enter Current Cash Balance
Your total cash and cash-equivalents on hand today, including any undrawn credit facilities you plan to count as usable cash.
Enter Monthly Revenue
Cash collected from customers each month — use actual collections, not booked/accrued revenue, for the most accurate burn picture.
Enter Monthly Operating Expenses
All monthly cash outflows: payroll, rent, software, marketing, and other operating costs.
Enter Net New ARR
New annual recurring revenue added over the trailing 12 months, used to calculate your Burn Multiple efficiency score.
Review your runway
See gross burn, net burn, months of runway remaining, and how efficiently your burn is converting into growth.
Real-World Scenario Example
"A seed-stage SaaS company has $500,000 in the bank, collects $25,000/month in revenue, spends $90,000/month, and added $300,000 in net new ARR over the past year."
Inputs
Result
Net Burn Rate = $65,000/month, Cash Runway = 7.7 months, Burn Multiple = 2.6x — spending is outpacing growth and a fundraise or cost cut is needed soon.
Important Disclaimer
This calculator provides estimates for planning purposes only. Actual runway can vary based on payment timing, seasonality, one-time expenses, and changes in revenue or spending not captured in a single monthly snapshot.
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