Why this one matters If there's a single number that lets you sleep at night, it's this one. Cash runway answers the question every founder is quietly carrying around: "How long do I actually have?" Profit on paper doesn't pay your bills — cash does. You can be "profitable" and still run out of money because a big client pays late or you stocked up on inventory. Runway cuts through all of that. It tells you, in plain months, how much time you've got at your current pace of spending. Once you know it, you can make calmer, faster decisions: - 12+ months? You have room to invest — a hire, a marketing push, better equipment. - 6–12 months? Steady as you go. Keep an eye on it and grow deliberately. - Under 6 months? Not a crisis, but it's your cue to act early — chase overdue invoices, trim non-essential spend, or line up a plan. Founders who watch this number make their moves from a position of calm, not panic. The whole point of clean books is being able to open them and make a decision in minutes. This is that number. The simple math Cash Runway (in months) = Cash you have right now ÷ Average monthly net burn Where net burn = how much more cash goes out than comes in in a typical month. Quick example: You have $60,000 in the bank. Over the last 3 months you spent about $10,000 more than you brought in each month. That's $60,000 ÷ $10,000 = 6 months of runway. (One happy note: if you're bringing in more cash than you spend, you don't have a burn rate to worry about — you're building a cushion. In that case runway is effectively "as long as this keeps up," and you can skip straight to deciding how to put that surplus to work.) How to pull it — step by step You need two things: cash on hand and average monthly net burn. Here's exactly where to click. If you use QuickBooks Online Step 1 — Get your cash on hand. 1. In the left menu, go to Reports. 2. Search for and open Balance Sheet. 3. Set the date to today. 4. Look at the Bank Accounts total near the top of the Assets section. That's your cash on hand. Write it down.