Burn rate and runway, explained
Net burn is monthly expenses minus monthly revenue. Simple runway is cash divided by net burn. This calculator also models revenue growth month by month, which shows the more useful answer: whether you reach break-even before the cash runs out.
Rules of thumb
- Under 6 months of runway: act now — cut costs, collect receivables faster, or arrange financing while your numbers still look healthy.
- 6–12 months: plan funding or cost changes this quarter.
- Over 12 months: you have room to invest in growth deliberately.
Lenders are most willing to lend when you don't urgently need the money. Open a line of credit while revenue is steady, then leave it unused as insurance.
Build a weekly routine with our cash flow management guide.