Insights · Acquisition
Cost per lead is the easiest number to improve and the easiest to improve wrongly
A lower cost per lead is not the same as acquisition getting better.
Short answer
Cost per lead says nothing about whether a lead will become a customer, so it can fall while acquisition gets worse. The number to put beside it is cost per closed deal — cost per lead divided by the closing rate of that same source. When the two move in opposite directions, the cause is almost always a change in lead quality rather than a decline in the sales team.
How the two halves pull apart
Nobody is doing anything wrong. Two ends of one chain are measured by two different teams.
Marketing is measured on lead volume
So it optimises toward more leads per unit of spend. The fastest route there is broader targeting and lower friction — both of which make leads easier to generate and harder to close.
Sales is measured on closing rate
So when leads get harder to close, their number worsens without them changing anything. Both sides then argue about quality, and neither has the data to settle it.
Nobody is measured on cost per closed deal
That is the only figure joining the two ends. Without it, each side optimises its own half correctly while the whole gets worse.
Four numbers that belong together
Cost per lead
Still needed, for daily operation and campaign comparison.
Closing rate by lead source
By source, never as an average. Averages conceal the source producing leads that never close.
Cost per closed deal
Cost per lead divided by that source's closing rate. This is the figure budget decisions should use.
Speed of first response
The gap between a lead arriving and a person contacting them. Often the strongest influence on closing rate, and usually the cheapest to fix.
Common questions
What is a reasonable cost per lead?
There is no general benchmark, even within one industry, because it depends on your deal value and your closing rate. Your own ceiling is calculable: average deal value multiplied by closing rate gives the most you can pay for a lead and still break even before other costs.
We get plenty of leads but few close. Where is the problem?
Before concluding anything, split closing rate by lead source and by response speed. Very often one or two sources are pulling the overall rate down while the rest behave normally, which makes it a targeting question rather than a sales-team question.
Should we use lifetime value instead?
Lifetime value is useful once repeat purchase is frequent enough and you have history to estimate from. Without that history it easily becomes a number that reassures rather than informs. Cost per closed deal is measurable this month, so start there and add lifetime value when the data supports it.
Does MWY work with the sales team?
MWY connects marketing to sales outcomes at the level of numbers: where leads came from, how many closed, and what each closed deal cost to acquire. Training a sales team or designing a sales process sits outside independent marketing oversight.
Want to know your real cost per closed deal?
The Audit joins advertising data to closing outcomes by lead source. The first thirty minutes are free.