Metrics & KPIs

CPL (Cost Per Lead)

Also known as: Cost Per Lead

CPL is the average cost to generate one lead, calculated as total ad spend divided by the number of leads collected.

What it actually means

Cost per lead is the headline metric for any lead-generation campaign, especially for service businesses that sell over the phone or in person. It rolls up every upstream cost — CPM, CTR, landing page conversion rate — into a single number you can compare against the value of a customer. A rising CPL points to one of those upstream levers slipping. CPL only tells half the story on its own: a $20 lead that closes 40% of the time is far better than a $5 lead that closes 2%. Always pair CPL with lead quality and close rate before declaring a campaign a winner or a loser.

Example

$1,000 in spend producing 25 lead-form submissions is a $40 CPL.

For a local business

A local roofer, dentist, or med spa lives and dies by CPL: if a customer is worth $3,000 and you close one in five leads, you can comfortably pay $100+ per lead and still profit.

Related terms

CPA (Cost Per Acquisition)

CPA is the average cost to acquire one paying customer (or completed action), calculated as spend divided by conversions.

ROAS (Return On Ad Spend)

ROAS is the revenue generated for every dollar of ad spend, calculated as conversion revenue divided by ad spend.

Want this metric run for you?

Karbon Agency runs Meta, SEO, and landing pages for local businesses — and shows you every metric, live.

Book a free strategy call Browse all terms