Cost per Click

Cost per click (CPC) is how much you pay on average for a click on your ad. The term also refers to the billing model in which you only pay for clicks, not impressions – typical for Google search ads.

Formula

Cost per click = ad spend ÷ number of clicks

On platforms that bill by impressions, CPC follows from CPM and click-through rate:

Cost per click = CPM ÷ (CTR × 1,000)

Example

A Google Ads campaign for a recruiting client costs $2,400 per month and gets 1,600 clicks.

CPC = $2,400 ÷ 1,600 = $1.50

If 5% of visitors apply, each application costs $1.50 ÷ 0.05 = $30.

What drives CPC

• Competition: In ad auctions, other advertisers push up the price for the same audience or keyword.
• Ad quality and CTR: Relevant ads with a high click-through rate are delivered more cheaply by the platforms.
• Targeting: Narrow, in-demand audiences cost more than broad ones.
• Seasonality: Prices often rise before holidays or at quarter end.

CPC in lead generation

A low CPC is not a goal in itself. Cheap clicks from people who never inquire cost more than expensive clicks that lead to deals. What matters is what happens after the click: how many visitors become leads, and how many leads become customers?

LeadMetrics captures the traffic source of every visit via ad parameters, UTMs and click IDs, and attributes leads and deals to the ad they came from. So for every ad you see not just the CPC, but also how many leads and deals its clicks produced. Build clean UTMs with the free UTM builder.

Common mistakes

• Optimizing for the lowest CPC: This often attracts unqualified traffic.
• Confusing clicks with visitors: Bounces before the page loads never show up in your website analytics.
• Setting max bids without a lead value: Without a value per lead, you do not know how much a click may cost.