Capital, cash and fundraising · Answered by Golden Section from more than 400 B2B software companies observed
We treat a burn multiple under 1x as efficient. Between 1x and 1.5x it could be a problem and deserves a look, and above 1.5x it is definitely a structural problem to fix before adding spend. But the multiple is a top-level view. The real question underneath it is the sales efficiency ratio: sales and marketing cost in a period divided by the new ARR booked in that period, where lower is better. A poor multiple can also come from churn eating new bookings, or from operating expense badly allocated between sales and product. Calculate the multiple as net burn divided by net new ARR over a trailing two to four quarters, then compute sales efficiency by channel before you cut anything, using an ARR schedule that reconciles to the general ledger.
Read the burn multiple first and the sales efficiency ratio second. Spend into growth when the trailing multiple is under 1x and sales efficiency is at or near the play's 0.70 target. Between 1x and 1.5x, find the cause, whether channel cost, churn or opex sitting in the wrong line, and fund only the efficient channels; above 1.5x, fix it before adding a dollar of burn.
| Metric | Value | What it means | Source |
|---|---|---|---|
| Burn multiple | under 1x | net burn ÷ net new ARR, same periodGolden Section benchmark for efficient growth | Golden Section, publishedThe Balanced Path |
| Burn multiple warning bands | 1x–1.5x deserves a look; above 1.5x is structural | net burn ÷ net new ARR, trailing two to four quartersa top-level view; the sales efficiency ratio underneath, or opex misallocated between sales and product, usually explains it | Golden Section operating viewGolden Section operating view |
| Sales efficiency ratio | 0.70 or less | prior-period sales and marketing expense ÷ new ARR booked, including upsellthe play's target; the Budget Creation play notes the top quartile struggles to beat 0.75 | Golden Section playbookSales Efficiency Ratio play |
| Burn multiple by stage | about 3 at seed, about 2 after Series A, lower at scale | net burn ÷ net new ARRSacks' worked example of how the multiple should improve as a venture-backed company matures, April 2020 | External benchmarkDavid Sacks, The Burn Multiple (2020) |
Burn multiple compresses the whole business into one ratio, which makes it a top-level view rather than a diagnosis. The denominator is net new ARR, so every dollar of churn is subtracted before the ratio sees any growth. A company with a good sales motion and a leaky installed base will show a high multiple, and cutting sales spend in response can make it worse, because the churn stays while the new bookings stop.
That is why we decompose it before acting on it. The sales efficiency ratio is the question underneath, because it isolates the cost of new ARR. The ARR schedule separates new, expansion and lost revenue by customer, which shows how much of gross bookings went to standing still. The cash flow forecast gives net burn on a cash basis, so the numerator is real money. And check the P&L allocation: engineers who support sales booked to product, or product salaries booked to sales and marketing, distort both ratios.
Getting this wrong is expensive in a specific way. A founder who reads 2.5x as a sales problem hires more sellers, adds burn, and raises the next round on a worse ratio. A founder who reads it correctly often finds the fix is retention or allocation, which costs less and moves valuation more.
A vertical software company began the year at $4M ARR, burned $1.8M over four quarters and added $900K of net new ARR, a burn multiple of 2.0x. The founder's instinct is to cut two sales roles. The ARR schedule tells a different story: gross new ARR was $1.5M and $600K of existing ARR churned, which is 85% gross retention. If a churn identification process brought gross retention to 95%, lost ARR would fall to about $200K and net new ARR would rise to about $1.3M on the same burn, a multiple near 1.4x. That moves it out of the structural zone into the band that deserves a look, where the sales efficiency ratio is the next question. These figures are invented to show the arithmetic and describe no real company.
Small denominators make the ratio volatile, so use a trailing four quarters and read anything above 1.5x as a question about the motion rather than a verdict. Sacks' own example puts early companies near 3x; the number should be falling by the time outside growth capital is on the table.
At this size the motion should be repeatable and the history long enough to trust, so we hold companies to under 1x. Between 1x and 1.5x, or above it, check the sales efficiency ratio by channel, churn replacement and how operating expense is split between sales and product.
Our benchmark trajectory is a 20%+ EBITDA margin at $10M and above, so many capital-efficient companies at this size burn little or nothing. Once net burn is near zero the multiple loses meaning, and EBITDA margin and the Rule of 40 become the better measures.
The ratio misleads when revenue is too small for the denominator to mean much, and it stops being useful once a company is deliberately cash-flow positive. In both cases read sales efficiency and gross retention directly.
From the Golden Section mistakes list, each paired with the play that prevents it.
A high burn multiple usually means a cracked engine, and adding spend before checking unit economics makes it break faster.
The ratio is only as reliable as the net burn figure, which requires knowing burn and runway every month.
A burn multiple means little until it is tracked against your own trailing quarters and a published benchmark.
In the order we would run them. Each is on its own page, most with a free Excel template.
Separates new, expansion and churned ARR so the denominator is accurate.
Produces net burn on a cash basis with collections timing in it.
Isolates what a dollar of new ARR costs, by channel.
Attacks the churn that inflates the multiple before it shows up in the ARR schedule.
The Balanced Path Burn multiple is one of the capital efficiency measures in its maturity model, next to the other benchmarks we hold companies to.
Divide net burn by net new ARR for the same period. Net burn is operating cash out minus operating cash in, after collections and excluding any equity or debt raised. Net new ARR is new plus expansion minus contraction and churn, taken from an ARR schedule that ties to the general ledger. Use quarterly or trailing-twelve-month figures rather than a single month.
It depends which half is negative. If the company generated cash while adding ARR, the ratio goes negative and that is the best position a software company can be in. If it burned cash while ARR shrank, the ratio is also negative and it is the worst. Report the case in words, because a negative number hides which one you are in.
Sales efficiency is the question underneath the multiple: it measures only what sales and marketing spend buys in new ARR. Burn multiple covers every dollar the company burns and nets churn out of the growth. A company can have strong sales efficiency and a poor burn multiple when churn, fixed cost or product cost is high, and a misallocation between the sales and product lines can distort both, which is exactly the case worth finding.
We look at the burn multiple early in equity diligence, and our lending funds channels with CAC payback under 18 months, so a falling multiple on a proven channel is often what makes non-dilutive capital possible. Above 1.5x, the right move is to fix the model first rather than finance it.
Growth capital lending →Reviewed by Dougal Cameron, CEO & Co-Founder on 2026-09-23. Golden Section observations are labeled separately from external benchmarks and illustrative arithmetic.