What is CPC?
CPC, or cost per click, is what you pay on average for a single click on a paid ad. It is the base unit of paid search and most paid social, where you are billed per click.
On its own, CPC is neither good nor bad. A 5 dollar click is cheap if it converts and expensive if it does not, which is why it is read alongside conversion rate and cost per acquisition.
The CPC formula.
CPC = total ad spend divided by the number of clicks. You can also derive it from two other metrics: CPC equals CPM divided by the clicks you get per thousand impressions, which is why a higher CTR lowers your CPC at the same CPM.
Both routes give the same number. The second is useful when you are planning from impression-based buys.
A worked example.
You spend 1,000 dollars and get 500 clicks. CPC is 1,000 divided by 500, which is 2 dollars. At a 10 dollar CPM and a 2% CTR, the same click costs 50 cents.
What is a good CPC?
There is no universal target, because CPC depends on the channel, the keyword, and how much competition is bidding. A high-intent B2B search term can cost far more per click than a broad display placement, and still be the better buy if it converts. Judge CPC against the revenue behind the click, not in isolation.
The metric that turns clicks into a verdict is cost per acquisition. A higher CPC with a strong conversion rate can beat a cheap click that never closes.
How to lower your CPC.
Improve quality and relevance so platforms reward you with cheaper clicks, raise your click-through rate, and tighten targeting. But the deepest lever is channel mix.
Paid clicks cost money every time; organic clicks do not. Organic search lowers your blended cost per click toward zero as it compounds, which is why it is the most durable answer to rising ad costs. See how we grow B2B SaaS traffic without per-click cost.