CPC (Cost Per Click) is the price paid for each click. In Search Ads it's the direct output of the auction model; in social it's a derivative of CPM and CTR. Fundamental unit of budget management, but not by itself a quality metric.
formula
CPC = Total Ad Spend / Total Clicks
Search CPC is determined by auction: competitor bids + your Quality Score + ad extensions (Ad Rank). Higher Quality Score = lower CPC for the same position.
bidding strategies
- Manual CPC · you set max bid per keyword. Good for small accounts.
- Maximize Clicks · Google buys most clicks per budget. Risk: low-quality clicks.
- tCPA / tROAS · conversion-focused; Google tunes CPC to hit your CPA/ROAS target.
- Maximize Conversions / Conversion Value · spends the budget for max conversions/value.
US benchmarks (2025)
- E-commerce generic · $0.80-2.50.
- E-commerce branded · $0.20-0.60.
- Insurance / finance · $4-22 (the priciest niche).
- B2B SaaS · $3-12.
- Education / online courses · $1.50-5.
lowering CPC
- Quality Score lift · better CTR, relevant landing page, tight keyword grouping cut CPC 20-40%.
- Negative keywords · block irrelevant queries; reduce search waste.
- Long-tail keywords · "running shoes" vs "women's trail running shoes size 9"; cheaper and convert better.
- Geo / device bid adjustments · lower bids in low-converting locations or device types.
Example: An online language school paid $3.80 average CPC on "english classes," Quality Score 4/10. After landing-page rewrite + 8 new ad variants + 220 negative keywords, Quality Score jumped to 8/10, CPC down to $1.60; same budget, 2.2x more qualified clicks.