Burn Rate

A profitable company never needed the word. There was revenue, there were costs, and the gap between them was profit, so the state of the business fit on a single income statement.

Startups don't fit that grammar. During the years spent building a product, having almost no revenue is normal, and losing money is a planned condition rather than a failure. But a planned loss can't run forever, and the thing worth knowing isn't how large this year's loss is — it's when the bank account empties. An income statement doesn't answer that. It mixes in costs that never move cash, like depreciation, and it books revenue when it is invoiced rather than when it is collected, so the balance can fall in a month the books call profitable.

So the first question in a Monday morning leadership meeting stopped being "what was our profit this quarter" and became "how much is in the account, and how much leaves every month." Burn rate is the name attached to that second question. It reads the bank account instead of the ledger, and it measures a speed instead of a result.

Take everything that left the bank account during the month and subtract everything that came in. What's left is that month's burn rate.

One name covers two figures, so split them first. Gross burn counts only the money going out. Net burn subtracts the money coming in. Spend $120,000 in a month while $40,000 arrives and gross burn is $120,000 while net burn is $80,000. When someone says burn rate without qualifying it in a meeting, they almost always mean the second one.

There are three steps.

1. Compare the balance at the start of the month with the balance at the end. This is a count of money that actually left rather than money a plan said would leave, so reading it straight off the account is the most accurate route.
2. Strip out any investment or loan money that landed that month. In a month when $750,000 of funding arrives, the balance goes up instead of down, and left alone the burn rate comes out negative, as though the business were earning.
3. Average the last three months. A month heavy with bonuses or annual renewals spikes on its own, and using one month as it stands makes the read wobble.

Three line items usually dominate. Payroll, servers and software subscriptions, and marketing. In a 45-person company, payroll is somewhere around 70 percent of the total. That's why no amount of tightening the other items moves the number much — changing burn rate in any meaningful way means changing the hiring plan.

The amount alone says nothing about whether the company is in trouble. A business burning $230,000 a month is not in worse shape than one burning $23,000. With $7.7 million in the bank, that first company has 33 months; with $230,000 in the bank, the second has 10. Burn rate is always read next to the balance, and the two get divided into runway — the number of months the cash lasts at the current pace.

The thresholds people work with are stated in runway. Above 18 months there's room to plan comfortably. Under 12 months it's time to start preparing to raise. Under 6 months the account can empty in the middle of negotiating, which is where the convention comes from: three or four months typically pass between a first meeting and money landing.

Growth belongs in the same view. A rising burn rate isn't the problem; a rising burn rate that revenue doesn't follow is. Burn multiple divides the cash burned by the revenue added and shows that cost directly, and the rule of 40 adds growth rate to operating margin to check the same balance at the level of the whole company. A company burning $80,000 a month while revenue climbs 30 percent a quarter and one burning the same amount while revenue sits still are in different positions with identical burn rates.

Swinging month to month is its own signal. Readings of $60,000, $110,000 and $70,000 leave nobody sure which month to plan against. It usually comes from contracts billed in quarterly lumps, or from spending that was never capped per team in advance. For the second cause, the fix is setting a budget as a per-team limit.

"Net burn came in at $90,000 this month. That's the three people who started last month."

Naming hiring as the cause, which also says the increase isn't going to reverse.

"If we cut burn 20 percent, how many months does that add to runway?"

Asking to price a spending cut in time before deciding on it.

"Give me net burn, not gross. Gross reads differently."

Asking everyone to standardize on the figure that nets out incoming cash.

At Pagedeck, Grace checks this number on the first business day of every month. She puts last month's closing balance next to this month's, takes the difference, and compares it against the trailing three-month average. If the gap is wide she opens the line items to find what pushed it. A month where Theo added servers to handle a traffic spike calls for a different response than a month where Sofia's conference costs all landed at once.

Grace's board slide carries the balance and runway right beside the burn rate, and those three lines feed the forecast, which projects what runway looks like by month if hiring proceeds as planned.

The most common reading is that lower burn is better. It's the speed at which cash disappears, so slower sounds safer. But a startup burns money to buy time — spending ahead of revenue to ship before a competitor does and take the market first. Cut the spending and the balance lasts longer while the company stands still. If halving spend stretches runway to 24 months and nothing about the business changes over those 24 months, what got extended isn't time; it's the wait for the same conclusion.

The other mistake is expecting a decision to cut to show up in next month's number. Editing a budget takes an afternoon, so it looks that way. In practice most line items lag. Payroll costs more in the first month, not less, because of notice periods and severance. Annual software contracts and office leases only drop off when the term ends. A team that doesn't know about the lag and starts cutting with three months of cash left will watch the balance fall fastest in the month they decided to save. Cuts get decided while there's still runway to absorb them.