Burn Multiple: How to Measure Growth Efficiency

By Newtown Analytics · October 21, 2026 · 7 min read

For startup founders

Burn multiple measures how much cash a company burns for each dollar of new annual recurring revenue it adds, and it is one of the cleanest tests of whether growth is being bought efficiently. A company that burns $6 million to add $4 million of recurring revenue has a burn multiple of 1.5. A company that burns $12 million to add the same $4 million has a burn multiple of 3.0 and is paying twice as much for each dollar of growth. This guide defines the metric, works through examples with checked arithmetic, shows how to read the result and connect it to runway, covers the way it changes by stage and explains the common errors. It belongs to unit economics and budgeting and forecasting, builds on the SaaS magic number and the Rule of 40, and leads to SaaS gross margin and expansion revenue.

The formula

Burn multiple = Net burn / Net new ARR

Net burn is the cash a company loses over the period: cash going out minus cash coming in, from operations and investing, excluding financing. If the company spent $9.0 million and collected $3.0 million over a year, net burn is $6.0 million. Net new ARR is the change in ARR over the same period: new customers, plus expansion, minus contraction and churn. It is a net measure, so it reflects retention as well as selling.

A worked example

A company had net burn of $6.0 million over twelve months. Its ARR rose from $5.0 million to $9.0 million.

Net new ARR = 9.0 - 5.0 = $4.0 million
Burn multiple = 6.0 / 4.0 = 1.5

For each dollar of ARR added, the company burned $1.50.

Comparing two companies

	Company P	Company Q
Net burn	$3.0M	$8.0M
Net new ARR	$3.0M	$4.0M
Burn multiple	1.0	2.0
ARR growth from a $6M base	50%	66.7%

Check: 3.0 / 3.0 = 1.0; 8.0 / 4.0 = 2.0; 3.0 / 6.0 = 50 percent; 4.0 / 6.0 = 66.7 percent. Company Q grows faster but pays double for it. If Q's investors will fund the burn, that may be a rational choice. If the market tightens, Q is much more exposed: with $16 million in cash, it has two years of runway at $8 million a year, and P with the same cash has more than five years at $3 million a year (16 / 3 = 5.3).

How to read the number

There is no universal threshold, and the right level depends on the stage, the market and the cost of capital. Rules of thumb used by many investors treat a burn multiple of around 1 or below as very efficient, 1 to 2 as good, 2 to 3 as acceptable for a growth stage and above 3 as a signal to investigate. Treat these as starting points. Early-stage companies often have a higher multiple because they invest before revenue arrives, and the multiple should come down as the company matures. A rising multiple over several periods is a warning, even if the level is acceptable.

Burn multiple and runway

Runway is cash divided by monthly net burn. A company with $12 million in cash and a net burn of $0.5 million a month has 24 months of runway. The burn multiple connects runway to growth: at a multiple of 1.5, adding $4 million of ARR a year costs $6 million of burn. If the plan is to add $8 million of ARR, and the multiple stays at 1.5, the burn would be $12 million, which exhausts the cash in one year. If the multiple rises to 2.0 because growth gets harder, the burn is $16 million, which the company cannot fund. Use the multiple to test whether a growth plan is financeable, not only whether it is attractive. See cash flow management for the cash side of the plan.

What moves the burn multiple

Driver	Effect on the multiple
Higher gross margin	Lowers burn for each dollar of revenue, lowers the multiple
Better retention	Raises net new ARR for the same effort. See gross revenue retention
More expansion	Raises net new ARR at low cost. See expansion revenue
Sales efficiency	Raises new ARR for each dollar of spending. See the SaaS magic number
Prepaid annual contracts	Bring cash in earlier and lower net burn
Headcount ahead of revenue	Raises burn before ARR follows
Price increases	Raise net new ARR with no added cost. See how to raise prices

Because net burn is a cash measure, it is affected by billing timing. A company that signs annual contracts and collects upfront shows lower burn than one billing monthly for the same ARR. Compare like with like.

Choosing the period

Use a trailing twelve months for stability. Quarterly figures are more responsive and more volatile. If a large customer pays in advance in one quarter, the quarter's burn looks small, and the next quarter's looks large. For a quick view, compute both: trailing twelve months for the level, and the last quarter for the direction.

A planning example

A board is considering two plans for next year, starting with $10.0 million of ARR and $18.0 million of cash.

	Plan 1: steady	Plan 2: accelerate
Net new ARR	$4.0M	$7.0M
Assumed burn multiple	1.5	2.0
Net burn	$6.0M	$14.0M
Ending ARR	$14.0M	$17.0M
Cash after the year	$12.0M	$4.0M
Months of runway at year-end burn rate	24	3.4

Check: 4.0 × 1.5 = 6.0; 7.0 × 2.0 = 14.0; 10.0 + 4.0 = 14.0; 10.0 + 7.0 = 17.0; 18.0 - 6.0 = 12.0; 18.0 - 14.0 = 4.0. Runway: Plan 1 at $6.0 million a year is $0.5 million a month, so 12.0 / 0.5 = 24 months. Plan 2 at $14.0 million a year is $1.17 million a month, so 4.0 / 1.17 = 3.4 months. Plan 2 delivers $3 million more ARR and leaves the company almost out of cash, dependent on new funding. The comparison makes the cost of speed visible.

Limits of the metric

It rewards cutting spending. A company that stops investing lowers its burn and its growth. Pair it with a growth measure.
It ignores the quality of ARR. Revenue from customers who churn quickly makes the multiple look better in the short term.
It ignores margin structure. A business with low gross margin burns more per dollar of revenue.
It can be noisy for small companies, where one deal changes net new ARR significantly.
It is not designed for profitable companies. If net burn is zero or negative, the ratio loses meaning.
It depends on how ARR is defined. See annual recurring revenue.

Common mistakes

Including financing flows in burn.
Using gross new ARR instead of net new ARR.
Comparing a quarter with a year.
Ignoring seasonal patterns in collections.
Treating a rule of thumb as a covenant.
Not linking the multiple to runway.

Gross burn and net burn

Do not confuse the two. Gross burn is the total cash spent in a period: payroll, vendors, rent and everything else. Net burn subtracts the cash received from customers over the same period. A company that spends $9.0 million and collects $3.0 million has a gross burn of $9.0 million and a net burn of $6.0 million. The burn multiple uses net burn because it measures how much of the company's own cash is consumed by growth. Gross burn is still worth tracking, because it shows the scale of the operation and the exposure if collections slow.

FAQs

What is the burn multiple?

Net burn divided by net new ARR. It shows how much cash a company burns to add each dollar of recurring revenue.

What is a good burn multiple?

Many investors treat a multiple of about 1 or lower as very efficient and above 3 as a concern. The right level depends on stage, market and funding conditions.

How is net burn calculated?

Cash outflows minus cash inflows from operations and investing over the period, excluding money raised from financing.

Why use net new ARR and not gross new ARR?

Net new ARR includes expansion and subtracts churn and contraction, so it reflects the whole change in the recurring base, including retention.

How does burn multiple relate to runway?

Net burn per month determines runway. The burn multiple shows how much burn a given amount of growth will require, so you can test whether a plan is fundable.

This article is for general information. It is not accounting, tax, legal or investment advice, and examples use illustrative numbers rather than client data. Confirm decisions that carry financial or legal consequences with a qualified professional.