Cost per click

Cost per click, usually called CPC, describes the price of an advertising click. It helps a business understand the cost of bringing someone from an advert to a destination, such as a product page or service page.

CPC is a traffic measure. It does not tell you whether the visitor became a suitable enquiry, bought a product or returned later. Its commercial meaning depends on what happens after the click.

How do you calculate average CPC?

Average CPC equals total cost of clicks divided by total clicks. If 300 clicks cost £600, average CPC is £2.

An average summarises a group of interactions. It does not mean every click cost exactly the same amount. Individual prices can differ within a campaign, and the mix of those clicks can change over time.

Use a consistent scope when comparing figures. A particular service, device, location or campaign may have a different average from the account as a whole. Comparing equivalent segments gives a more useful basis for a decision.

Average CPC versus a maximum bid

A maximum CPC bid is a bidding instruction used in certain campaign setups. Average CPC is a reported outcome. They describe different things and should not be substituted for one another.

Some advertising systems also use automated bidding towards a chosen outcome. In those cases, the advertiser may be managing an objective and budget rather than setting a simple fixed price for every click.

Before comparing platforms or agencies, establish which bidding approach is being discussed. A headline bid setting alone does not explain the eventual cost or quality of traffic.

What affects cost per click?

The advertising environment, competition, audience and campaign settings can all influence the price and composition of clicks. A specialist commercial query may operate in a different market from a broad informational phrase.

A movement in the account average may reflect a change in what the campaign is buying. If spend shifts towards a more valuable service with more expensive clicks, the overall CPC can rise without indicating a deterioration.

Investigate the underlying segments before changing the strategy. A single blended average can conceal both strong opportunities and poor purchases.

What is a good CPC?

A useful CPC is one the business can support given the likely outcome. A low price is not automatically attractive, and a high price is not automatically wasteful.

Consider two illustrative campaigns. One generates many inexpensive visits from people researching a general topic. Another reaches fewer people actively selecting a supplier. The second could be more valuable even if each click costs considerably more.

Connect the price with conversion rate, lead quality and the economics of the sale. That turns a traffic metric into part of a business assessment.

How does CPC relate to cost per enquiry?

A simple planning relationship is: cost per enquiry approximately equals CPC divided by the enquiry conversion rate expressed as a decimal, when the underlying definitions and audience align.

For example, a £2 CPC and a 4% enquiry rate imply roughly £50 per enquiry: £2 divided by 0.04. This is an illustrative model, not a prediction that every batch of traffic will produce that result.

The next question is how many enquiries are suitable and how many become customers. Cost per acquisition explores the cost of the chosen outcome in more detail.

Should you try to lower CPC?

Sometimes. Reducing the cost of genuinely useful traffic can improve campaign economics. The risk is optimising the price while weakening the audience.

A change that lowers CPC by attracting less relevant searches may reduce enquiry quality. A tighter campaign could raise average CPC while improving the proportion of suitable prospects. Evaluate the whole journey before declaring either change successful.

The best improvement may sit after the click. If the destination is confusing or a form is unreliable, fixing the experience can create more value from the traffic already being purchased.

How should CPC appear in a report?

Show it alongside the number of clicks and total spend, so the reader can understand its scale. Add the relevant conversion outcome and quality measures where available.

Explain material changes in campaign composition. A new service, a different geography or a move between channels can affect the average and make historical comparisons less direct.

Avoid presenting a percentage reduction in CPC as a complete business result. It is evidence about the cost of traffic, and the rest of the report should explain whether that traffic supported the intended objective.

Common questions about CPC

A rising CPC does not automatically mean a campaign should stop. Establish whether the audience, value or conversion performance changed before deciding.

A very low CPC does not prove that the campaign is efficient. It may simply mean clicks are inexpensive in that environment. Efficiency depends on the outcome the business receives for its total spend.

CPC and click-through rate are also different. One measures cost per click; the other measures the proportion of impressions producing clicks. They answer separate questions.

For the platform calculation, see Google's guidance on monitoring advertising metrics. Explore Linford advertising for the wider connection between audience, campaign and destination.