Startup runway & burn rate calculator
Enter your cash, income and expenses to find your net monthly burn and exactly how long your runway lasts.
How long your cash lasts
If net burn is zero or negative you're cash-flow positive. Otherwise this is how long until you must raise more money or cut costs.
Indicative estimate based on your current inputs. Real runway shifts with revenue, one-off costs and timing — revisit it monthly.
How the runway & burn rate calculator works
Your net burn is simply monthly expenses minus monthly income. If that number is positive, it's how much cash you spend beyond what you earn each month. Divide the cash in your bank by that net burn and you get your runway — the number of months before you run out of money.
The calculator also shows runway in weeks so you can plan around near-term deadlines, and flags when you're cash-flow positive. If income covers expenses, your net burn is zero or negative and your runway is effectively infinite: you're no longer racing a clock.
Founders use runway to time fundraising, hiring and cost cuts. A common rule of thumb is to start raising when you have six to nine months of runway left, since closing a round takes time. Watch the trend month over month, not just the single number.
Most early-stage startups aim for 12 to 18 months of runway after a raise. Below six months you're in the danger zone and should be actively raising or cutting costs. The right target depends on how predictable your revenue is and how long fundraising takes in your market.
Extend your runway with smarter systems
Rising burn is often just manual work in disguise. Book a consultation and we'll map where automation, AI and a leaner web stack can cut your monthly costs — and buy you more months of runway.