Agency & B2B
SaaS Business Runway & Burn Rate Calculator
Enter starting cash, MRR, and monthly overhead. Get monthly net burn and the calendar month your runway hits zero if revenue stays flat.
Inputs
Results
Cash runway
—
If MRR and expenses stay flat
Monthly net burn—
Cash-zero date—
Monthly surplus / deficit—
Status—
How this calculator works
- Enter cash in bank and current MRR.
- Add total monthly operating expenses.
- See net burn and months of runway.
- Read the projected cash-zero month and year.
Why this matters
Enter starting cash, MRR, and monthly overhead. Get monthly net burn and the calendar month your runway hits zero if revenue stays flat.
Frequently asked questions
How is SaaS runway calculated?
Runway months ≈ cash ÷ monthly net burn, where net burn is expenses minus revenue.
What if MRR covers expenses?
If net burn is zero or negative, you are default-alive on a cash-flow basis and runway is effectively unlimited at current levels.
Should I include growth spend?
Yes. Use fully loaded monthly expenses including salaries, servers, ads, and tools for a realistic date.
How often should startups recalculate runway?
Monthly—or after any major hire, fundraising, or churn shock.