Cost Per Click (CPC)

Cost per click is exactly what it sounds like: the amount you pay each time someone clicks your ad.

What Cost Per Click Means in Marketing

When you run ads on Google, Meta or LinkedIn, you’re usually not buying placements. You’re buying clicks. CPC is the unit price.

Here’s the part people miss. You don’t set your CPC. You set a maximum bid, and then an auction decides what you actually pay. In Google Ads you’re typically charged just enough to beat the advertiser below you, which means your real CPC is almost always lower than your bid.

This is why two advertisers bidding the same amount on the same keyword can pay very different prices. The auction weighs your bid against how relevant Google thinks your ad and landing page are. Be more relevant and you pay less for the same spot.

CPC on its own tells you nothing about whether a campaign works. It’s an input cost. A campaign with 20 clicks and a beautiful CPC is worthless if none of them convert.

How Cost Per Click Works

The basic calculation is simple:

CPC = Total ad spend ÷ Total clicks

Spend 50,000 and get 2,500 clicks and your average CPC is 20.

What matters more is the number underneath it, which is what a click is actually worth to you:

Value per click = Conversion rate × Average order value × Gross margin

If 2% of clicks convert, your average order is 2,000, and your margin is 40%, each click is worth 16 to you. Paying 20 means you’re losing 4 every time someone clicks, no matter how reasonable 20 sounds.

That calculation is the whole game. Everything else is optimisation around it.

Cost Per Click Example

Branded search is the clearest illustration. If you bid on your own company name, your CPC is usually very low, because nobody else is competing hard and your relevance score is near perfect. People searching your name already want you.

Generic category terms are the opposite. Everyone wants them, relevance is lower, and the price climbs accordingly. The same budget buys a fraction of the traffic.

Why Cost Per Click Matters for Marketers

CPC is where most budget waste hides. Not in dramatic failures, but in slow bleed: paying 20 for clicks worth 16, across thousands of clicks, for months.

Knowing your value per click turns bidding from guesswork into arithmetic. You stop asking “is this CPC high?” and start asking “is this CPC above or below what a click earns me?” Those are completely different questions, and only one of them has an answer.