It usually starts with a single number. The CFO presents the monthly burn rate, and the CEO nods. There are expenses, there is revenue, everything seems clear. But that number, important as it may be, is only half the story. The other half is runway. And that is where surprises often begin. In the following lines, we will explain both terms, clarify the difference between them, and explain why, in order to make sound management decisions, a CFO must consistently present both to the CEO and the leadership team.

Let’s begin with the more familiar term: burn rate. This refers to the amount of cash the company is burning from its cash reserves each month of operation. In other words, how much it costs the company to continue operating and producing every month. It is important to emphasize that burn rate refers to net cash burn from the company’s cash position. For example, if a company has monthly revenues of one million dollars but expenses of one and a half million dollars, its burn rate is half a million dollars per month. That is the difference between revenues and expenses from a cash flow perspective, not an accounting one.

As for the term runway, it refers to a period of time, usually measured in months, that the company can continue operating at its current burn rate. For example, if that same company burning half a million dollars per month has five million dollars in cash reserves, its runway is expected to be ten months of operation.

These two terms are critical for understanding the company’s operational breathing room. A strong CFO does not look at one without the other, and certainly does not present them as merely technical figures. Instead, they use them to lead a conversation and reflect reality. They do not only report the burn rate, but explain what it does to the runway and translate the data into business decisions. For example: “If we slow down hiring or reduce headcount by a certain percentage, we gain an additional number of months to operate.”

Companies do not fail solely because of a high burn rate. They fail because they lose control of their runway. One decision that seems small can shorten months of flexibility. A CFO who understands this builds scenarios, not just reports. They ask what happens if revenues are delayed, if a funding round is postponed, or if the market temporarily contracts. And they translate those possibilities into clear financial recommendations for the CEO.

At Danoy, we operate according to this approach. As a finance department in practice, we help companies understand not only the numbers, but their meaning. Our external CFO builds a real runway picture, connects it to management decisions, and advises the CEO from a broad perspective that integrates cash, time, and risk. Because in the end, strong management is not only about knowing how much you are burning, but understanding how much time you have left and making the right decisions based on both metrics and the company’s overall activity.