The burn multiple: how efficiently are you really growing?
Growth is easy to buy if you're willing to burn enough cash. The burn multiple exists to answer the harder question underneath: how much cash did that growth actually cost?
Skip the math — the free burn multiple calculator runs this from your own figures.
Open the free calculator →What the burn multiple is
The burn multiple divides the net cash a company burned over a period by the net new ARR it added in that same period. If you burned a million dollars and added a million in net new ARR, your burn multiple is 1 — a dollar burned for every dollar of new recurring revenue. Popularised by investor David Sacks, it has become a favourite because it captures the efficiency of the entire business in a single, hard-to-game number.
Unlike metrics that look only at sales and marketing efficiency, the burn multiple takes total net burn — everything the company spent net of what it brought in. That means a bloated cost base, a weak gross margin, or heavy churn all show up in it, because they all consume cash without adding proportional ARR. It's a whole-company efficiency gauge, not a departmental one.
Why lower is better
A lower burn multiple means each dollar of new recurring revenue cost less cash to produce, which signals a more efficient, more durable business. A high burn multiple means growth is expensive — you're consuming a lot of cash for each dollar of ARR — and that becomes dangerous if funding gets harder to raise, because the model depends on continually replacing the cash it burns.
This is why the metric earns its keep in tougher fundraising climates. When capital was cheap, high burn could be excused as buying growth; when it isn't, efficient growth is what survives. A company with a low burn multiple has more control over its own destiny, because it needs less outside cash to keep growing.
How to read your number
As a rough frame, a burn multiple under 1 is often seen as very efficient, numbers between 1 and 2 as reasonable depending on stage, and higher numbers as a signal that growth is getting expensive. But stage matters: very early companies often have noisy, high multiples simply because ARR is small relative to the fixed cost of existing, so the metric becomes most meaningful as a business scales.
The single most useful practice is to track your own burn multiple over several periods and watch the trend. A multiple that's climbing means each new dollar of ARR is costing more cash to win — a sign that acquisition is getting harder, churn is rising, or costs are outrunning growth. Catching that early, while there's room to adjust, is exactly what the metric is for.
Using it alongside other metrics
The burn multiple is a summary number, and it's most powerful read alongside the metrics that explain it. If your multiple is rising, the MRR waterfall, net revenue retention, and magic number tell you why — whether it's churn eating your net new ARR, acquisition getting less efficient, or costs growing faster than revenue. The burn multiple flags that something changed; the component metrics tell you where to look.
The free calculator gives you a burn multiple from net burn and net new ARR, and the full tracker holds it by period so you can watch the efficiency trend. It's assumptions-driven and not financial advice, but it turns a vague sense of "we're burning a lot" into a specific, trackable measure of how efficiently that burn is buying growth.
Questions
How is the burn multiple different from CAC payback?
CAC payback focuses narrowly on sales and marketing — how long it takes the gross profit from a customer to repay the cost of acquiring them. The burn multiple is broader: it uses total net cash burn against net new ARR, so it captures the whole company's efficiency, including product, G&A, gross margin, and churn, not just acquisition. The two are complementary — CAC payback zooms in on the acquisition engine, while the burn multiple judges whether the entire business is turning cash into recurring revenue efficiently.
What burn multiple should an early-stage startup target?
There's no universal target, and very early companies often show high or erratic burn multiples simply because their ARR is small relative to the baseline cost of operating, which distorts the ratio. The metric becomes more meaningful and more comparable as a business scales and ARR grows. Rather than fixate on hitting a specific number early, watch your own trend as you grow: a burn multiple that improves over time is the encouraging signal, and one that worsens is worth investigating before it compounds.