What is Cost Per Click (CPC)?
Also known as: CPC, Pay per click, PPC pricing
What is cost per click (CPC)?
Cost per click is what an advertiser pays each time someone clicks one of their paid ads. It is the dominant pricing model in paid search and a common one in social ads. Across Google Search, the average CPC sat at $4.66 in 2023 per WordStream.
CPC is set by an auction, not a sticker price. Every time a user searches a keyword or loads a feed slot, the platform runs a real-time auction. Advertisers submit bids. The platform ranks them by bid times Quality Score (Google), or bid times relevance and engagement signals (Meta, LinkedIn). The winner pays just enough to beat the next bid.
That auction structure is why CPC swings so much. Same keyword, different time of day, different CPC. Same audience, different creative, different CPC.
CPC formula and worked example
The formula is simple division.
CPC = Total ad spend / Total clicksSpend $1,000 on a campaign that drives 250 clicks. CPC is $4.00. The same campaign with 500 clicks would have a $2.00 CPC. Spend stays flat. Efficiency doubles.
There are two flavors worth knowing:
- Average CPC. What you actually paid across all clicks in a period. This is the number reported in Google Ads, Meta Ads Manager, and LinkedIn Campaign Manager.
- Maximum CPC bid. The ceiling you set. The auction usually charges less than your max. On Google Search, the actual CPC formula is
(Ad Rank of next advertiser / your Quality Score) + $0.01.
A worked example. You bid a max CPC of $5.00 on the keyword "project management software." Your Quality Score is 8. The next advertiser's Ad Rank is 24. Your actual CPC is (24 / 8) + 0.01 = $3.01. You paid $1.99 less than your ceiling.
CPC vs CPM vs CPA
Three pricing models cover almost every paid channel. Each one bills on a different event.
| Model | What you pay for | Best for | Risk |
|---|---|---|---|
| CPC (cost per click) | Each ad click | Performance campaigns, search intent | Pay for clicks that never convert |
| CPM (cost per mille) | Every 1,000 impressions | Brand awareness, reach campaigns | Pay even if no one engages |
| CPA (cost per acquisition) | Each conversion | Mature accounts with conversion data | Platform raises bid to find conversions |
CPC sits in the middle. It costs more than CPM per dollar of reach. It costs less per dollar of risk than CPA. Most direct-response advertisers start on CPC, then graduate to target CPA once the campaign has 30 to 50 conversions per month.
Average CPC by industry and platform
CPC benchmarks vary by an order of magnitude across platforms. The same advertiser will pay $0.50 on the Google Display Network and $8 on LinkedIn Sponsored Content. Below are 2023 to 2024 medians from each platform's published benchmarks.
| Platform | Average CPC (USD) | Source |
|---|---|---|
| Google Search (cross-industry) | $4.66 | WordStream, 2023 |
| Google Display Network | $0.63 | WordStream, 2023 |
| Meta (Facebook + Instagram) | $0.83 | Statista, 2024 |
| LinkedIn Sponsored Content | $5.39 | LinkedIn Marketing Solutions, 2024 |
| Microsoft Ads (Bing) | $1.54 | WordStream, 2023 |
Industry matters more than platform. WordStream's 2023 data shows legal services at $8.94 average CPC on Google Search, dating and personals at $0.19, attorneys and legal at the top, and arts and entertainment at the bottom. Insurance, finance, and B2B software all sit above $5.
What drives CPC up or down
Three forces decide what you pay per click. Get all three right and CPC drops without touching the bid.
Quality Score and relevance
Google rates every keyword 1 to 10 on three signals. Expected CTR. Ad relevance. Landing page experience. WordStream's Quality Score research shows that moving from a Quality Score of 5 to 10 cuts CPC by about 50 percent. Moving from 5 to 1 raises CPC by 400 percent. Meta and LinkedIn run similar relevance signals under different names.
Auction competition
If three advertisers bid on a keyword, CPC is moderate. If thirty bid, the floor rises. SaaS keywords, insurance terms, and legal queries draw the most bidders, which is why their CPCs sit highest. Use Google's auction insights report to see who else is in your auctions and how their impression share is trending.
Targeting precision
Broad targeting sweeps in cheap, low-intent clicks. It also sweeps in expensive ones the algorithm thinks "look like" your audience. Tightening targeting (narrower keyword research, exact match, smaller geo, fewer placements) usually drops CPC because the auction pool shrinks.
How to lower CPC
Five moves cover most accounts. Run them in order.
- Audit Quality Score. Pull every keyword with a score below 7. Rewrite the ad copy to mirror the keyword. Speed up the landing page. Match the headline to the search query.
- Add negative keywords weekly. Pull the search terms report. Anything irrelevant, anything informational that doesn't convert, anything branded for a competitor, push to negatives. WordStream finds the average account wastes 20 to 30 percent of spend on irrelevant search terms.
- Tighten match types. Broad match casts wide. Phrase and exact match keep the auction pool narrow. Reserve broad match for accounts with strong conversion data and Smart Bidding active.
- Test long-tail keywords. Head terms like "crm software" cost $10 plus. Long-tail variants like "crm software for solo real estate agents" often run under $2 and convert at higher rates. See the long-tail keyword entry for how to find them.
- Improve the ad creative. Higher CTR raises Quality Score, which lowers CPC. Test three to five responsive search ad headlines per ad group. Rotate every two weeks.
Real-world example with numbers
A B2B SaaS company runs Google Search ads on the keyword "expense management software." Starting state, after month one.
- Spend: $12,000
- Clicks: 1,500
- Average CPC: $8.00
- Quality Score: 4
- Conversions: 15
- Cost per acquisition: $800
The team runs the five-step playbook over six weeks. They rewrite ad copy to use the exact keyword in the H1. They cut landing page load time from 4.2s to 1.6s. They add 47 negative keywords from the search terms report. They split the campaign into a head-term ad group and a long-tail ad group with bids 60 percent lower on long-tail.
End state, month three.
- Spend: $12,000
- Clicks: 3,200
- Average CPC: $3.75
- Quality Score: 8
- Conversions: 41
- Cost per acquisition: $293
CPC dropped 53 percent. Conversions nearly tripled. Same budget. The lever was Quality Score, not the bid.
That is the pattern in most accounts. CPC is rarely a bidding problem. It is a relevance problem dressed up as a bidding problem. Fix the relevance signals first, and the auction does the rest.
Related terms
Frequently asked questions
What is a good cost per click?
A good CPC depends on the platform and industry. Google Search averages $4.66 across industries per WordStream's 2023 benchmarks. Display sits near $0.63. Legal and insurance run above $8. Compare your CPC to industry medians, not a global average.
How is CPC different from CPM and CPA?
CPC is the price per click. CPM is the price per 1,000 impressions, paid whether anyone clicks. CPA is the price per conversion, like a signup or sale. CPC bills on engagement. CPM bills on reach. CPA bills on outcome.
Why is my CPC suddenly higher?
Three usual causes. Quality Score dropped because ad relevance or landing page experience fell. A new competitor entered the auction and pushed bids up. Or your match types broadened, pulling in expensive head terms. Check the auction insights report first.
Does a lower CPC always mean better performance?
No. A $0.30 click that never converts is more expensive than a $4 click that becomes a $200 sale. CPC is an input metric. Cost per acquisition and return on ad spend are the outcome metrics that decide whether a campaign actually works.
Can you lower CPC without losing volume?
Yes, in most accounts. Tighten match types, add negative keywords, raise Quality Score with sharper ad copy and faster landing pages, and shift budget toward long-tail keywords. WordStream reports that raising Quality Score from 5 to 10 cuts CPC by roughly 50 percent.