Most law firms measure marketing the wrong way. They count leads, celebrate a busy intake week, and assume the campaigns are working. Then they get to the end of the quarter and realize they spent $30,000 on ads that produced $15,000 in collected fees.
The problem isn’t the campaigns. It’s the metrics.
Here are the five metrics that actually tell you whether your legal marketing is working.
1. Cost Per Retained Client (CPRC)
Cost per lead is easy to calculate. It’s also almost meaningless on its own. A $40 lead that converts to a retained client at 5% is worse than a $150 lead that converts at 40%. Cost per retained client cuts through the noise.
How to calculate it: Total marketing spend ÷ number of retained clients in the same period.
A healthy CPRC depends heavily on your practice area and average case value. For personal injury firms, CPRC of $800–$1,500 is common. Criminal defense might see $300–$600. Track yours monthly and compare channel to channel.
2. Lead-to-Intake Rate
You’re paying for leads. Are they reaching intake? Many firms lose 20–40% of their leads before anyone even picks up the phone. This metric reveals intake process failures, not just marketing failures.
Benchmark: If your lead-to-intake rate falls below 60%, fix intake before spending more on ads.
3. Marketing-Sourced Revenue by Channel
You need to know which channels produce retained clients — and which produce retained clients with high case values. Google Ads might produce more leads than organic search, but if organic search produces higher-value cases, that changes your entire budget allocation.
4. Return on Ad Spend (ROAS) by Practice Area
$10,000/month on ads looks different for a family law firm versus a mass tort firm. Track ROAS separately by practice area so you’re not letting one high-revenue area subsidize another that’s quietly burning cash.
5. Time to Retain
How many days pass between a lead submitting and a retainer being signed? Reducing this number by even 48 hours can meaningfully improve close rates. Track it, then optimize your intake workflow to close the gap.
These five metrics give you a complete picture of marketing performance — from first click to retained client. If you’re manually pulling this data from multiple platforms, consider that an attribution platform like Kenzsys can automate the entire pipeline and deliver these numbers automatically, every week.