Most personal injury firms can tell you roughly what they spend on marketing each month. Very few can tell you what they actually pay per signed case, broken down by channel. That gap is where money disappears.
This guide gives you a simple framework to audit every lead source you're currently using. It takes about 30 minutes, a spreadsheet, and the willingness to look at numbers that might be uncomfortable. The payoff: you'll know exactly which channels are making you money and which ones are quietly draining it.
Why Cost Per Lead Is the Wrong Metric
If you evaluate lead sources by cost per lead, you're measuring the wrong thing. A $100 lead that never converts is infinitely expensive. A $400 lead that becomes a $50,000 case is the best deal you'll find this year.
The metric that matters is cost per signed case. This is the total amount you spend on a channel divided by the number of cases you actually sign from that channel. Everything else is a vanity metric that makes bad channels look acceptable and good channels look expensive.
Industry data backs this up. Google Ads clicks for personal injury keywords average $100 to $300 each in competitive markets, with some terms exceeding $500. At a typical 5-10% conversion rate from click to lead, and then another 15-30% conversion rate from lead to signed case, the real cost per signed case from paid search often lands between $2,000 and $5,000 in urban markets. In smaller markets, it might run $1,000 to $3,000. Those numbers are workable if you're tracking them. They're devastating if you're not.
The 30-Minute Audit: Step by Step
Here's the exercise. Block 30 minutes. Pull up your case management system and your billing records. You need three months of data minimum. Six months is better. Twelve is ideal.
Step 1: List every lead source. Write down every channel that generated leads in the last 90 days. This typically includes Google Ads, Local Service Ads, your website's organic traffic, directory listings like Avvo or Justia, referrals from other attorneys, referrals from past clients, any lead generation services you're buying from, social media ads, and anything else. Don't skip channels that feel small. They all count.
Step 2: Count total leads per channel. For each source, count how many inquiries came in. Phone calls, form submissions, emails, however they arrived. If your intake system doesn't track source, that's a problem to fix immediately, but for now, use your best estimate.
Step 3: Count signed cases per channel. This is the number that changes everything. Of all the leads from each source, how many became signed clients? Not consultations. Not maybe-laters. Signed retainer agreements.
Step 4: Calculate total spend per channel. Include everything. Ad spend, monthly retainers, per-lead fees, directory subscription costs, referral fees. If you're paying a marketing agency to manage your ads, include their management fee. The number needs to be fully loaded.
Step 5: Divide spend by signed cases. This is your cost per signed case by channel. Write it down next to each source. This is the number that tells you the truth about your marketing.
What Good Numbers Look Like
Personal injury is a high-value practice area, which means you can afford a higher acquisition cost than most industries. But there are limits. Here's a framework for evaluating what you're seeing.
The average personal injury case settles between $20,000 and $50,000, though this varies enormously by case type. Auto accidents tend to settle lower, while truck accidents, medical malpractice, and wrongful death cases can reach six or seven figures. Attorney fees on contingency typically run 33% of the settlement amount, increasing to 40% if the case goes to litigation. On a $40,000 auto accident settlement at 33%, the firm collects roughly $13,200 in fees. On a $150,000 truck accident case, that number climbs to $49,500 or more.
With those fee numbers as a baseline, here's how to think about cost per signed case by channel:
Referrals: $0 to $500. If you're paying anything meaningful to acquire referral cases, something is off. These should be your lowest-cost, highest-converting source. Industry benchmarks suggest referral cases convert at two to three times the rate of cold leads. If referrals aren't at least 25-30% of your signed cases, you're underinvesting in relationships.
Organic search and website: $500 to $2,000. SEO has high upfront costs but compounds over time. If you've been investing in content and search visibility for a year or more, your cost per signed case from organic should be declining steadily. If it's flat or rising, your SEO spend isn't working.
Google Ads and LSAs: $1,500 to $5,000. This is the range most firms land in for paid search. Below $1,500 means you're either in a low-competition market or running an exceptionally well-managed campaign. Above $5,000 means something is broken, whether it's targeting, landing pages, intake speed, or all three. Firms spending $15,000 or more per month on ads in major metros should be tracking this number weekly, not quarterly.
Lead generation services: $1,000 to $3,500. This depends entirely on the provider and the model. Shared leads sold to multiple firms typically cost $50 to $200 each but convert at much lower rates because you're competing with every other firm that bought the same lead. Exclusive leads cost more per lead, often $250 to $600, but convert at significantly higher rates because you're the only firm calling. When you calculate cost per signed case, exclusive leads frequently outperform shared leads despite the higher sticker price.
Social media ads: $3,000 to $8,000+. Facebook and Instagram can work for personal injury, but they're interruptive rather than intent-driven. You're reaching people who weren't searching for an attorney, which means longer nurture cycles and lower conversion rates. Some firms make this channel work. Most don't, and the cost per signed case reflects it.
Directories: Varies widely. Avvo, Justia, and similar platforms can deliver leads, but volume is typically low and unpredictable. Track the cost per signed case here like any other channel. If you're paying $500 a month for a premium listing and signing one case a quarter, your cost per signed case from that channel is $1,500. That might be fine. But you need to know the number.
The Profitability Test
Once you have your cost per signed case by channel, run one more calculation: the profitability ratio.
Take your average fee per case (the attorney fee you collect, not the total settlement) and divide it by your cost per signed case. This gives you your return on acquisition spend.
For example: if your average fee is $15,000 and your cost per signed case from Google Ads is $3,000, your ratio is 5:1. You're generating $5 in fees for every $1 you spend acquiring that case. That's strong.
If your ratio is 3:1 or higher, the channel is profitable and worth scaling. Between 2:1 and 3:1, the channel is working but has room for optimization. Below 2:1, you're in dangerous territory. After you account for overhead, staff time, and case costs, there may not be much left. Below 1:1 means you're losing money on every case from that channel.
Here's the table to fill in:
Channel | Total Spend (90 days) | Total Leads | Signed Cases | Cost Per Signed Case | Avg Fee Per Case | Profitability Ratio
Fill in each row. Sort by profitability ratio, highest to lowest. The bottom of that list is where you cut or renegotiate. The top is where you invest more.
Common Patterns and What They Mean
After running this audit for dozens of firms, the same patterns show up repeatedly.
Pattern 1: Google Ads is your biggest spend and your worst performer. This happens when campaigns run on autopilot. Broad match keywords, no negative keyword list, landing pages that haven't been updated in years, and an intake team that takes hours to call leads back. The fix is usually operational, not budgetary. Before you cut spend, tighten the campaign and measure again.
Pattern 2: Referrals are your best channel but you're not investing in them. Nearly every firm discovers that referrals deliver the lowest cost per signed case and the highest conversion rate. And nearly every firm admits they don't have a formal referral program with tracking, follow-up, and consistent outreach. This is free money sitting on the table.
Pattern 3: You're paying for shared leads and the conversion rate is terrible. If you're buying leads from a marketplace that sells the same contact to four or five firms, your conversion rate will reflect the competition. The lead isn't bad. The model is. You're in a speed contest with firms that have faster intake teams, and even when you win that race, the prospect has already talked to two other attorneys. Switching to an exclusive lead source typically improves conversion rates dramatically, even if the per-lead price is higher.
Pattern 4: You have no idea where 20% of your leads came from. If your intake team isn't asking every caller how they found you and recording the answer, a chunk of your pipeline is unattributable. This makes it impossible to optimize anything. Fix the intake script first, then revisit the audit in 90 days with clean data.
What to Do With the Results
The audit gives you a clear picture. Here's how to act on it.
Kill or reduce channels below 2:1. If a channel has been running for at least six months and still can't clear a 2:1 profitability ratio, it's not going to magically improve. Reallocate that spend to channels that are working.
Scale channels above 3:1. If a channel is profitable and you haven't maxed out its capacity, spend more. This sounds obvious, but most firms are more comfortable continuing to fund underperforming channels than increasing investment in proven ones.
Test one new channel at a time. If you're cutting a source, don't just reallocate to existing winners. Reserve 10-15% of your marketing budget for testing new channels. Run the test for 90 days with proper tracking, then audit it alongside everything else.
Fix your intake tracking. If the audit revealed attribution gaps, solve this before your next audit cycle. Every lead should have a recorded source. Every consultation should have an outcome. Every signed case should trace back to its origin. Without this, you're optimizing blind.
Where Exclusive Lead Partners Fit
When firms run this audit, the most common gap they discover is a missing middle ground between referrals (great but not scalable) and paid ads (scalable but expensive). They need a channel that delivers qualified, pre-screened leads at a predictable cost per signed case, without competing against five other firms for the same lead.
That's the space exclusive lead partners occupy. Unlike shared marketplaces, an exclusive partner delivers each lead to one firm only. Unlike Google Ads, you're not paying per click and hoping the math works out. You're paying per qualified lead, scored for quality, with full incident details and contact preferences included.
The best exclusive lead arrangements cap the number of partner firms per market, typically two to three. This isn't artificial scarcity. It's structural: fewer firms means each firm gets more leads, which means higher conversion rates, which means the partner can invest more in lead quality. Everyone wins.
For most mid-size PI firms, exclusive leads should land in the $1,000 to $2,500 cost-per-signed-case range, which puts them well inside the profitable zone for a practice area where a single case can generate $10,000 to $50,000 or more in attorney fees.
Run This Audit Every Quarter
Markets change. Channels shift. What worked six months ago might not work today. The firms that grow consistently aren't the ones with the biggest budgets. They're the ones that know exactly where every dollar goes and what it returns.
Set a recurring calendar reminder to run this audit every 90 days. Each cycle gives you cleaner data, sharper decisions, and a clearer picture of what's actually driving your firm's growth.
CaseLeads partners with up to 3 firms per city for exclusive, pre-qualified lead delivery. Every new partner starts with 3 free trial leads to see the quality firsthand. Apply for your city at caseleads.ai.
