In plain English
Spend divided by leads. The problem is that the easiest way to improve it is to lower the bar for what counts as a lead.
Which makes it the metric most likely to look better while the business does worse. Cheaper leads that never buy consume sales time and produce nothing.
What to know
Spend over leads
Whatever a lead is defined as.
Improves as quality falls
Which is the central hazard.
Needs a companion metric
Cost per qualified lead, or per customer.
Varies by source
Which is the useful comparison.
Why it matters
Any report showing cost per lead without conversion-to-customer alongside it can be improved by making things worse. The two numbers have to travel together.
Common mistakes
×Reporting CPL with no downstream conversion data.
×Gating low-intent content to inflate lead counts.
×Optimising campaigns to CPL alone.
×Comparing CPL across sources with different lead definitions.
FAQs
What should I report alongside CPL?
Lead to customer conversion rate, and cost per customer.
Why did my CPL improve while sales fell?
The leads got cheaper and worse. That is the usual explanation.
WRITTEN BY TARIQ SALLAM
Marketing Consultant. Entrepreneur. Content Creator.
I'm a marketing consultant, entrepreneur and content creator. I help businesses grow through practical marketing, websites, SEO, content and AI.
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