GreenLine Yards, a landscaping crew, holds $31,500 in cash against a monthly burn of $5,700, with everything in it: rent, gear, software and the owner draw. That's 5.5 months of runway at the current burn. It's above the four-month line, so the owner can plan in seasons instead of weeks.
Runway = cash on hand ÷ monthly burn, using your heaviest recent burn month rather than your cheapest. The main runway guide has the full reasoning and what to do at each level, and the calculator runs it on your numbers in your browser.
The twist for landscaping and trades businesses
Seasonal businesses should read runway at the season trough, not the annual average. June always survives. What matters is whether the cash on October 1 carries the crew to March.