A free SaaS burn rate calculator that turns your cash balance and monthly cash flow into a runway in months. Enter what you hold and what you burn, see your net burn and the months you have left, plus what that signals about your next move.
This calculator runs entirely in your browser. Nothing you enter is sent anywhere or stored. It is a quick estimate, not financial advice.
Runway is the number that ends companies, not revenue. Burn rate on its own means nothing without context. Burning $200,000 a month is reckless at $1M in the bank and routine at $20M. What matters is how many months of room it buys and whether that is enough to hit the milestone that unlocks the next round.
The common mistake is tracking gross burn and ignoring the revenue coming in. Net burn is the honest number, cash out minus cash in, because that is what actually drains the bank. Track net burn, know your runway in months and you turn a vague anxiety into a date on the calendar.
Total the cash you can actually spend today. Bank balance plus anything liquid. Do not count receivables you have not collected yet.
Monthly cash out minus monthly cash in. Use real averages over the last three months, not your best month or your budget plan.
Cash divided by net monthly burn gives runway in months. Under 12 and you should already be planning the next raise or the path to breakeven.
A SaaS burn rate calculator turns your cash balance and monthly cash flow into a runway figure. It works out net burn, which is monthly cash out minus monthly cash in, then divides your cash by that to show how many months you have before the money runs out. It is the fastest way to turn a vague worry into a date.
Net burn is monthly cash out minus monthly cash in. Runway is your cash in the bank divided by that net burn, expressed in months. If cash in is higher than cash out you are cash-flow positive and not burning runway at all. Use real three-month averages rather than your best month for an honest figure.
Most investors want to see at least 12 to 18 months of runway after a raise, because that is roughly how long it takes to hit the milestones that justify the next round. Under 6 months is the danger zone where you should already be raising or cutting. Over 24 months can mean you are not investing enough in growth.
Gross burn is your total monthly cash out with no revenue offset. Net burn subtracts the cash coming in, so it reflects what actually drains the bank. Net burn is the honest number for runway, because a company with high gross burn but strong revenue can have a long runway while a low-revenue company burns faster than its spend suggests.
Runway sets your fundraising clock. Raising takes three to six months from first meeting to wired cash, so you want to start while you still hold a year or more of runway. Going into a raise with under six months left weakens your position and lets investors sense the pressure. Track runway in months so the raise starts on your terms.
If burn is climbing faster than pipeline, that is usually a marketing efficiency problem we fix. Book a 30-minute audit and we will tell you which lever moves first. No sales sequence.
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