What is CPC (Cost Per Click)?
CPC is the amount you pay each time someone clicks your ad. In the Google Ads auction your actual CPC is usually less than your maximum bid: it is roughly the Ad Rank of the advertiser below you divided by your Quality Score, plus one cent. Average CPC is total cost divided by total clicks over a period.
What to know in practice
- You rarely pay your max bid. The auction charges only what's needed to clear the next-highest Ad Rank, so a higher Quality Score lowers your actual CPC at the same position.
- CPC varies enormously by industry: legal and insurance terms can exceed $50, while many B2B and local terms run $1-5.
- Manual CPC gives per-keyword bid control; Smart Bidding sets CPCs automatically to hit a CPA or ROAS target.
- A rising average CPC isn't automatically bad if conversion rate rises with it. Judge CPC against cost per conversion, never in isolation.
Common misconception
Lowering your max CPC bid does not reliably lower costs, it usually just lowers your position and impression share. Improving Quality Score is the durable way to pay less per click.
Related terms
- Quality Score → Paid Media
- Ad Rank → Paid Media
- Smart Bidding → Paid Media