How much do law firms spend on PPC advertising? What do they actually get back in the form of cases?
We analyzed $3.3M in managed ad spend across three major practice areas to find out.
Key Findings
- Bankruptcy leads convert at 5x the rate of criminal defense leads (10% vs 2%)
- LSA delivers 50% of signed cases with only 40% of the budget, while Google Ads delivers the cheapest leads!
- 84% of law firms can’t attribute more than 75% of their signed cases to specific marketing channels.
PPC Performance by Practice Area
| Practice Area | Avg Monthly Spend | Cost Per Lead | Cost Per Signed Case | Lead→Case CVR |
|---|---|---|---|---|
| Personal Injury (MVA) | $33,172 | $284 | $468 | 7% |
| Criminal Defense | $75,084 | $60 | $659 | 2% |
| Bankruptcy | $40,796 | $201 | $192 | 10% |
What The Data Tells Us
Criminal defense has the cheapest leads, but the worst conversion rate. At $60 per lead, criminal defense PPC looks attractive on paper. But only 2% of those leads become signed cases, resulting in a $659 cost per case. The lesson: cheap leads aren’t valuable.
Bankruptcy delivers the best unit economics. Despite a higher cost per lead ($201), bankruptcy’s 10% conversion rate produces the lowest cost per signed case at $192.
If you’re a bankruptcy firm, PPC is likely your most efficient acquisition channel.
To put it in perspective: with average bankruptcy case fees ranging from $1,500 to $3,500, a $192 acquisition cost means you’re looking at a potential 7x to 18x return on every dollar spent acquiring a client through PPC.
Personal injury sits in the middle. At $284 per lead and a 7% conversion rate, PI firms pay $468 per signed case. Given that PI case values typically range from $15,000 to $150,000+, this represents a strong ROI for most firms.
Google Ads vs LSA Performance
| Channel | Share of Budget | Share of Leads | Share of Signed Cases | Avg CPL | Avg CAC |
|---|---|---|---|---|---|
| Google Ads | 60% | 76% | 49.7% | $95 | $2,971 |
| LSA | 40% | 24% | 50.3% | $205 | $2,485 |
The cheaper channel isn’t producing cheaper cases. That disconnect is worth sitting with, and we break that down in our full report.
Why Cheap Leads Are the Most Expensive Mistake in Legal PPC
The pattern across every data point is the same: the metric most agencies optimize for (cost per lead) often tells the opposite story from the metric that actually matters (cost per signed case).
Criminal defense has the cheapest leads in our analysis. But it also has the worst unit economics. LSA costs more than double per lead compared to Google Ads, but it delivers more signed cases at a lower cost per case.
If your agency is reporting CPL as its primary KPI, you’re likely making budget decisions based on the wrong number.
But there’s a deeper problem. Even if you wanted to measure cost per signed case, most firms can’t.
Our data shows that 84% of law firms have significant gaps in tracking where their signed cases actually come from, and one in four firms has essentially no attribution at all.
Download the full study, which breaks down:
- The complete attribution distribution across all 13 firms (and why most are flying blind)
- The specific tracking gaps we find during onboarding (and the infrastructure fix!)
- Four concrete recommendations for optimizing your PPC based on what actually drives signed cases
- How we define and verify signed cases vs. raw leads (that distinction matters…)
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About This Study
The State of Law Firm PPC report analyzes performance data from thirteen plaintiff-side law firms managed by Pareto Legal in 2025. They together represent $3.3M in combined Google Ads and Local Service Ads (LSA) spend.
Methodology
- Clients: 13 plaintiff-side law firms
- Total managed spend: ~$3.3 million
- Date range: 2025 (managed months only)
- Leads are defined as: Form submissions, live chats, phone calls, and LSA message leads
- Signed cases: CRM-verified cases directly attributed to managed channels via CallRail, form submissions, or live chat data
