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Burn Multiple

Step-by-Step Guide to Understanding the Burn Multiple

Last Updated March 5, 2024

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Burn Multiple

Burn Multiple Formula

Popularized by David Sacks, the general partner and co-founder of Craft Ventures, the burn multiple is a tool for evaluating the burn rate of a startup as a multiple of its revenue growth.

SaaS companies normally have revenue models based around subscription services and/or multi-year contracts, making the burn multiple most applicable for high-growth SaaS startups.

The usefulness of the burn multiple stems from its ability to assess the cost at which growth is generated, rather than focusing solely on the rate of growth itself.

The formula for calculating the burn multiple is the ratio between the burn rate and the new annual recurring revenue (ARR).

Burn Multiple = Net Burn ÷ Net New Annual Recurring Revenue (ARR)

Where:

  • Net Burn = Cash Revenue – Cash Operating Expenses
  • Net New ARR = New ARR + Expansion ARR – Churned ARR

Conversely, the burn multiple can also be denoted on a monthly basis, i.e. the net burn would be calculated using the monthly revenue and monthly operating expenses, while the net new monthly recurring revenue (MRR) would replace the recurring revenue metric.

For instance, if a startup’s burn multiple is 1.0x, for each dollar spent on growth, one dollar in net new ARR is generated.

However, if the burn multiple is 4.0x, for each dollar spent on growth, only a quarter of net new ARR is produced in return.

What is a Good Burn Multiple for SaaS Companies?

The following rules are used to interpret a startup’s burn multiple:

  • High Burn Multiple → The higher the burn multiple, the less efficient the startup is at achieving each incremental step of revenue growth.
  • Low Burn Multiple → On the other hand, a lower burn multiple is preferred because it implies the startup’s revenue is generated more efficiently.

Burn Multiple Rules of Thumb – David Sacks

Burn Multiple Chart (Source: David Sacks)

Startups with low burn multiples in theory should have more runway and be capable of withstanding an economic downturn, which practically all existing and potential investors would perceive positively.

In contrast, the growth of certain startups can be overly reliant on the continued injection of outside capital from investors.

But if access to capital were to end – i.e. existing or new venture capital firms were no longer willing to provide capital to fund growth – the startup’s unsustainable burn rate and low margins would likely soon catch up to them.

While growth often requires significant reinvestments and capital expenditures, startups with a substantial burn rate relative to their growth cannot support such a continued pace of spending, putting the startup in an unfavorable position of constantly needing to raise capital.

These sorts of startups should begin cost-cutting efforts immediately and work on improving their operational efficiency, especially if a slow-down in performance is expected.

The burn multiples of early-stage startups will typically improve and gradually approach zero as they mature. But once the burn multiple does reach zero, this implies that the previously unprofitable startup is now turning a profit.

What Factors Cause a High Burn Multiple?

The common causes of a high burn multiple include:

  • Inefficient Sales and Marketing (S&M) Strategy
  • Misallocation of Capital, i.e. Low Return on Invested Capital (ROIC)
  • Inability to Scale from Low Gross Margin
  • Low Sales Productivity
  • High Revenue Churn Rate
  • High Customer Attrition Rate

Burn Multiple Calculator – Excel Template

We’ll now move to a modeling exercise, which you can access by filling out the form below.

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Burn Multiple Calculation Example

Suppose we’re attempting to evaluate a SaaS startup’s historical growth across the past four years.

While unrealistic, we assume in this exercise that the startup’s net burn remains constant at $10 million per year.

In the annual recurring revenue (ARR) roll-forward, the beginning ARR of our startup is $20 million.

From there, our assumptions for the new ARR, expansion ARR, and churned ARR are as follows.

Annual Recurring Revenue (ARR) Year 1 Year 2 Year 3 Year 4
Beginning ARR $20 million $25 million $31.5 million $41.5 million
Plus: New ARR $4 million $5 million $6 million $10 million
Plus: Expansion ARR $2 million $3 million $6 million $14 million
Less: Churned ARR ($1 million) ($1.5 million) ($2 million) ($4 million)
Ending ARR $25 million $31.5 million $41.5 million $61.5 million

The net new ARR is calculated by adding the new ARR to the expansion ARR and then subtracting the churned ARR.

Net New ARR

  • Year 1 = $4 million + $2 million – $1 million = $5 million
  • Year 2 = $5 million + $3 million – $1.5 million = $6.5 million
  • Year 3 = $6 million + $6 million – $2 million = $10 million
  • Year 4 = $10 million + $14 million – $4 million = $20 million

Using those inputs, we can calculate the burn multiple for each year.

Burn Multiple

  • Year 1 = $10 million ÷ $5 million = 2.0x
  • Year 2 = $10 million ÷ $6.5 million = 1.5x
  • Year 3 = $10 million ÷ $10 million = 1.0x
  • Year 4 = = $10 million ÷ $20 million = 0.5x

Our model indicates that the startup is becoming more efficient at generating revenue, as reflected by the declining burn multiple.

From Year 1 to Year 4, the burn multiple dropped from 2.0x to 0.5x – which given our fixed net burn assumption, implies that the startup’s sales efficiency must be improving as it continues to scale.

Burn Multiple Example Calculation

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