Sales Efficiency Calculator

Sales efficiency measures how much new annual recurring revenue your go to market engine generates for every dollar you spend winning it. This calculator divides the new ARR added in a period by the sales and marketing spend in that period, giving you a ratio that is a close cousin of the well known SaaS magic number. It is one of the fastest ways to judge whether your growth is being bought cheaply or expensively, and founders, finance leads and revenue teams lean on it heavily when deciding how aggressively to invest in growth. A ratio above one means you added more than a dollar of new ARR for every dollar spent, which is generally healthy, while a ratio well below one signals that acquisition is getting expensive and may need attention before you pour in more budget. To use it, enter the new ARR you won in the period and your total sales and marketing spend for the same window. The tool returns the efficiency ratio along with the new ARR earned per dollar of spend, expressed in cents, so the result is easy to explain. A few habits keep the number meaningful. Match the periods so spend and the ARR it helped create line up sensibly, and remember there is often a lag between spending and the revenue it produces. Include the full cost of sales and marketing, salaries, commissions, tools and programs, not just media spend, or you will flatter the figure. Track the ratio over several quarters rather than reading too much into one period, since a single quarter can swing on timing. Compare it with your payback period and customer acquisition cost for a fuller view of go to market health.

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1.50
Sales efficiency
New ARR per $1 spent$1.50

Sales efficiency = new ARR / sales and marketing spend. Estimate only, not financial or tax advice.

How it works

Sales efficiency divides the new annual recurring revenue won in a period by the sales and marketing spend in that period. A ratio above one means you added more than a dollar of new ARR for each dollar spent. The per dollar figure expresses the same ratio as revenue earned per dollar.

Worked example

With $1,200,000 of new ARR and $800,000 of sales and marketing spend, sales efficiency is $1,200,000 divided by $800,000, which is 1.50. That is the same as earning $1.50 of new ARR for every $1 spent.

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Frequently asked questions

How is this different from the magic number?

The classic SaaS magic number compares new ARR to the prior period spend to allow for a lag. This calculator uses a simpler same period gross version, new ARR divided by current spend. Both measure how efficiently spend turns into recurring revenue.

What ratio should I aim for?

As a rough guide, above one is generally healthy and means you added more than a dollar of new ARR per dollar spent. Around 0.7 to 1 is often seen as acceptable, while well below that suggests acquisition is getting expensive. Context and stage matter.

What spend should I include?

Include the full cost of sales and marketing for the period, salaries, commissions, software and program costs, not only advertising. Leaving costs out overstates efficiency. Be consistent every period.