Glossary
What is cost per lead?
Definition
Cost per lead (CPL) is a marketing metric that measures how much a business spends, on average, to generate one new lead. It is calculated by dividing total spending on a campaign or channel by the number of leads it produced. CPL helps a business judge whether its marketing is efficient and which channels deliver leads most affordably.
01How cost per lead is calculated
The basic formula divides the total cost of a marketing effort, such as ad spend plus associated fees, by the number of leads it generated in the same period. It can be computed for a single campaign, a channel, or all marketing combined. Comparing CPL across channels shows where each additional lead is cheapest.
02Why cost per lead matters
A low CPL is not automatically good if those leads rarely convert, so businesses read it alongside conversion rate and customer lifetime value. Together these metrics reveal whether the cost of acquiring a lead is justified by the revenue it eventually brings. For small businesses with tight budgets, CPL guides where to invest limited marketing dollars.
Frequently asked questions
Is a lower cost per lead always better?
Not necessarily. Cheap leads that seldom become customers can cost more overall than pricier leads that convert well, so CPL should be weighed against lead quality and conversion rate.
How is cost per lead different from cost per acquisition?
Cost per lead measures spend to generate an inquiry, while cost per acquisition measures spend to gain an actual paying customer, which accounts for the conversion step.
Related terms
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