CPM (cost per thousand impressions) is the standard pricing metric for CTV advertising. But “good” CPM depends entirely on what you’re getting for that price. A cheap impression that reaches nobody relevant is more expensive than a premium one that lands.
CPM Ranges by Platform Tier
These aren’t arbitrary numbers. They reflect audience quality, content exclusivity, and targeting capabilities. Premium platforms deliver higher household income viewers in brand-safe environments. FAST channels provide reach at scale with broader demographics.
The real insight: a $40 CPM with 97% completion and precise targeting beats a $15 CPM where half the impressions reach people outside your DMA or practice area. CTV’s non-skippable format means you’re getting completed views. The question is whether those views reach the right people.
What Drives Your CPM
Targeting precision is the primary driver. General run-of-network inventory costs less than demographic-targeted campaigns, which cost less than behavioral targeting, which cost less than advanced layering with legal-intent signals. That $10-15 step-up for each targeting layer usually pays for itself in lead quality.
Content adjacency matters too. Appearing alongside NFL Sunday Night Football commands 30-50% higher CPMs than cable reruns. That premium can make sense if attention quality justifies the spend, or it might be waste if your audience skews differently.
Seasonality creates predictable fluctuations. Q4 tends to run 15-30% higher due to holiday advertiser competition. Tentpole events (Super Bowl, major premieres) spike CPMs significantly. Smart buyers plan around these cycles rather than fighting them.
Premium CPMs ($35-55)
- Better demographic and behavioral targeting precision
- Prestige content adjacency builds brand credibility
- 95%+ completion rates in controlled environments
- Works when case values justify the per-impression cost
Value CPMs ($15-25)
- Reach at scale for broad awareness building
- Budget-friendly for testing creative and markets
- FAST channels deliver solid completion rates
- Works for frequency building after premium establishes awareness
The Real Metric: Cost Per Completed View
Raw CPM is misleading. What matters is cost per completed view, accounting for platform completion rates and audience relevance.
A $40 CPM on a premium platform with 97% completion and 80% relevant audience means you’re paying roughly $0.052 per relevant completed view. Compare that to a $20 CPM on a discount network with 85% completion and 35% relevant audience. Your cost per relevant completed view is actually $0.067. The “cheap” CPM costs more per person who matters.
This math is why law firms often see better returns from streaming campaigns than from discount inventory buys. The waste factor tilts heavily toward precision.
Legal-Specific Economics
Legal audiences are competitive and limited. Expect a 10-20% premium over general market rates, plus potential compliance fees for creative review and geographic restriction management.
But run the real numbers. At $35,000+ average case values, even a $35 CPM makes economic sense quickly. Assume 600,000 monthly impressions at $0.035 per impression: $21,000 monthly spend. If that generates 50 leads and 8 signed cases at $35K average value, you’re looking at $280,000 in revenue against $21,000 in ad spend. CPM pricing discussions become academic at that return ratio.
The question isn’t “is this CPM expensive?” It’s “does this CPM generate cases at a profitable rate?”
When to Pay More vs Less
Pay premium CPMs when you can access behavioral data identifying high-intent audiences, when sports inventory drives engagement quality that general programming can’t match, or when brand positioning alongside prestige content has strategic value for your firm.
Use value CPMs when you’re building broad awareness in a new market, testing creative messaging before committing premium budget, or maintaining frequency after establishing awareness on premium inventory.
Watch for red flags. CPMs under $10 often indicate low-quality inventory or fraud risk. Claims of “premium inventory at value prices” are usually mislabeled. Demand platform transparency and completion rate reporting in writing.
How to Evaluate Your Current CPMs
Ask your media partner for blended CPM across all inventory, which platforms your ads actually run on, what targeting is included at that rate, and your actual completion rate. Then work backward from your lead costs.
Take your total spend, divide by total impressions, multiply by 1,000 to get blended CPM. Divide that by your completion rate to get cost per completed view. Estimate what percentage of those impressions reached relevant audiences. That effective CPM is what you’re actually paying per qualified view.
Compare that number to your cost per lead and average case value. That’s the only evaluation that matters.
The Bottom Line
For legal advertising, target $20-35 for general streaming, $15-25 for FAST platforms, and $35-55 for premium inventory. But don’t optimize CPM when cost per case is the actual goal.
The cheapest CPM generates no leads. The most expensive CPM is the one that doesn’t convert. Find the balance that works for your case values and market.