CPM vs CPC: The Core Difference
Two pricing models dominate digital advertising:
- CPM (Cost Per Mille) — you pay for every 1,000 impressions, regardless of clicks
- CPC (Cost Per Click) — you pay only when someone clicks your ad
Both have their place. The right choice depends on your campaign goal, vertical, and funnel stage.
CPM vs CPC: Side-by-Side Comparison
| Factor | CPM | CPC |
|---|---|---|
| Payment trigger | Per 1,000 impressions | Per click |
| Budget predictability | High | Variable |
| Best for | Brand awareness, reach | Traffic, lead gen |
| Risk | Low engagement | Click fraud |
| Optimization lever | CTR improvement | Quality Score |
| Popunder ads | Standard model | Rarely used |
How to Convert CPM to Effective CPC
You can compare CPM and CPC campaigns using this formula:
Effective CPC = CPM / (CTR × 10)Example: $2 CPM with 0.5% CTR = $2 / (0.5 × 10) = $0.40 effective CPC
This lets you compare apples to apples across campaigns bought on different models.
When CPM Wins
- Your landing page has a high conversion rate (the volume offsets lower CTR)
- You’re running popunder campaigns (CPM is the industry standard)
- You’re building brand recall and don’t need immediate clicks
- You want tight budget control with predictable spend
When CPC Wins
- Your offer has a very specific, intent-driven audience (search ads)
- You only want to pay for engaged traffic
- Your CPM inventory has low CTRs and poor conversion rates
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CPM Benchmarks by Vertical in 2026
| Vertical | Avg. CPM (US) | Avg. CPM (EU) |
|---|---|---|
| Finance / Crypto | $3.50–$6.00 | $1.50–$3.00 |
| VPN / Security | $2.00–$4.00 | $1.00–$2.50 |
| Entertainment | $1.50–$3.00 | $0.80–$1.50 |
| App Installs | $1.00–$2.50 | $0.50–$1.50 |
| Adult | $0.80–$2.00 | $0.50–$1.20 |
Frequently Asked Questions
Is CPM or CPC cheaper?
CPM is generally cheaper per impression, but CPC ensures you only pay for actual engagement. CPM becomes cheaper per click when your CTR is above the breakeven point.
Do popunder ads use CPM or CPC?
Popunder ads are almost exclusively bought on CPM. You pay per thousand popunders delivered, not per click.
What’s a good CPM for display ads?
In the US, $1–$3 CPM is typical for non-premium inventory. Premium placements and Tier 1 GEOs can reach $5–$10 CPM.