Sales efficiency asks one question: for every dollar spent acquiring revenue, how much recurring revenue arrived?
**Sales efficiency = new recurring revenue in a period ÷ sales and marketing
spend that produced it**
Above 1.0 means a dollar in returned more than a dollar of new ARR. It is not profit, and it is not payback. It is a ratio of two things you chose how to define.
The two choices that decide the number
Which spend counts. Fully loaded sales and marketing, including salaries, commission, tooling, and programs? Or programs only? The first is honest and produces a much lower number. Teams quoting efficiency above 2.0 are usually counting the second.
How much lag. Spend in Q1 produces revenue in Q2 and Q3. Comparing same-period spend to same-period revenue understates efficiency while growing and overstates it while shrinking. A one-quarter lag is the common convention, and it is a convention rather than a truth.
Write both down beside the number. Without them the metric is not comparable to another company or to your own prior year.
The variants you will meet
- The magic number, which uses the quarter-over-quarter change in
recurring revenue, annualised, divided by prior-quarter spend. Same idea, fixed lag, quarterly framing.
- New versus net. New-only efficiency measures acquisition. Net efficiency
includes expansion and churn, which mixes acquisition performance with retention performance. Report new separately or a retention problem hides inside an acquisition metric.
- Gross versus contribution. Some constructions subtract cost of revenue
first. Comparable only to other constructions doing the same.
A worked example
A quarter with $1.2m of sales and marketing spend, fully loaded, and $1.05m of new ARR in the following quarter.
Sales efficiency = $1,050,000 ÷ $1,200,000 = 0.88
Under a dollar in, under a dollar back within the lag window. Whether that is acceptable depends on retention: at high net dollar retention the cohort keeps paying and the ratio recovers, while at low retention it never does. Sales efficiency and net dollar retention have to be read as a pair.
What the number does not tell you
- Where the inefficiency is. A low ratio could be targeting, conversion,
pricing, or ramp. Diagnose with conversion rate by stage.
- Whether it will hold. A quarter of unusually large deals moves it and
says nothing about the system.
- Whether spend was the constraint. Adding spend to an efficient motion
does not reproduce the ratio; efficiency usually falls as volume rises.
The traps
- Mixing new and net between quarters without saying so.
- Changing the lag convention mid-series, which moves the number with no change
in performance.
- Excluding commission or tooling from spend, quietly.
- Reading a single quarter. This metric is noisy at anything below several
hundred deals; use a trailing four-quarter view.
Where this sits
Sales efficiency is in the Measurement pillar of the Tenbound Pipeline Architecture Standard, and it grades the whole system rather than any pillar. A team improving it usually did so at Market or Signal, by spending on better-selected accounts, rather than anywhere the metric itself points.