The intake coordinator runs the morning numbers. Cost per lead is $420. Conversion looks reasonable. The dashboard is green.
Meanwhile the managing partner is staring at a P&L that doesn't add up. Marketing spend is up. Signed cases are flat. The math the marketing team is presenting and the math running the business are not the same math.
The gap is the cost per signed case — a number almost no PI firm calculates correctly, because it requires combining data from the ad platform, the CRM intake log, and the attorney case review process into a single reconciled figure. Most firms track cost per lead. The ones that track cost per signed case usually stop at the surface number. Almost none of them reconcile the full acquisition cost after the 75 to 85 percent of leads that intake rejects before an attorney ever sees the file.
This post walks through the full cost per signed case calculation: what the channel data shows, how intake rejection rates multiply acquisition cost, what the math looks like across channels, and why the number your dashboard reports has almost nothing to do with what you actually paid to sign a case.
What the Industry Reports as Cost Per Signed Case
According to LEXGRO's 2026 PI cost per lead benchmarks, personal injury qualified leads run $183 to $442 on average depending on channel and case type. Google Ads and LSA leads sit at the higher end of that range in competitive markets.
But cost per lead is not cost per signed case. It is the cost of getting a prospective client into the intake queue. What happens next is where the real acquisition math lives.
PI firms reject 75 to 85 percent of leads at intake. That is not a pessimistic estimate — it is the operational reality of a practice area where lead quality varies enormously across channels and case merit requirements are non-negotiable. For every 100 leads that enter the intake queue, between 15 and 25 result in a signed retainer.
At a $442 average cost per lead with a 20 percent lead-to-retainer conversion rate, the math before any other cost layer is:
The industry benchmark range of $2,500 to $3,000 per signed case reflects this reality. The dashboard CPL of $442 does not. The gap between those two numbers — $2,173 per signed case — is the cost of the intake rejection process that marketing reporting never captures.
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How Channel Mix Changes the Calculation
Cost per signed case is not uniform across acquisition channels. The cost per lead, conversion rate, and case quality vary significantly by channel — and the combination of all three determines the true cost per retained client. Most PI firms run multiple channels simultaneously and average the CPL across all of them, which obscures the channel-level economics entirely.
| Channel | CPL Range | Conversion Rate | Est. CPSC |
|---|---|---|---|
| Google LSA | $250–$500 | 25–35% | $685–$950 |
| Referral | $100–$300 | 30–45% | $400–$700 |
| Google Search Ads | $300–$650 | 15–25% | $1,200–$2,600 |
| Traditional TV | $400–$800 | 10–18% | $1,100–$1,466 |
| Lead vendors / aggregators | $150–$400 | 8–15% | $1,500–$3,000+ |
Referral drives the lowest cost per signed case at $400 to $700 — not because the leads are cheap, but because the conversion rate is high and intake rejection is low. Cases referred by existing clients or medical providers arrive pre-qualified. Lead vendors and aggregators show the inverse: low CPL, low conversion, high CPSC after intake processing all the rejected files.
A firm running a blended channel mix of Google Ads, TV, and lead vendors — and averaging the CPL across all three — will report one number while the actual cost per signed case by channel tells three completely different stories. Budget decisions made on the averaged CPL send money toward channels with the worst cost per signed case and pull it from the ones that are actually working.
The Intake Rejection Problem No Dashboard Captures
Here is the calculation most PI firms have never done in writing.
A firm runs $100,000 in Google Ads spend in a month. Average CPL is $400. That produces 250 leads. Intake processes all 250. The intake team rejects 200 of them — liability issues, comparative fault, statute of limitations, insufficient injury documentation, uninsured defendants. The 50 remaining leads go to attorney review. Attorneys reject another 10. Forty cases are signed.
The dashboard says $400. The reconciled cost per signed case is $2,790. That $2,390 gap is not a rounding error. It is the cost of processing 210 rejected leads — intake staff time, attorney review time, CRM management — that never shows up in the marketing platform's reporting because it happens after the pixel fires.
"The dashboard reports the cost of getting someone on the phone. The firm pays the cost of everything that happens after."
Why Google Ads CPC Makes This Worse
Personal injury is one of the most expensive paid search verticals in the country. iLawyer Marketing's keyword cost data documents CPC rates running $150 to $500+ per click in competitive PI markets, with top-tier injury terms in major metros going significantly higher. The result is that every rejected lead at intake cost $150 to $500 in media spend before anyone picked up the phone.
At $300 average CPC with a 15 percent lead-to-call conversion rate, the cost per phone call is $2,000 before a single intake question is asked. That call enters the intake queue. Eighty percent of calls don't become signed cases. The $2,000 cost per call becomes a $10,000 cost per signed case before any staff time is factored in.
This is the math that most PI marketing dashboards actively obscure. CPC is visible. Cost per click is visible. Cost per lead is visible. The downstream cost of every rejected lead — the intake staff time, the attorney review, the CRM entry that goes nowhere — is invisible to every platform the marketing team uses.
How Case Value Changes the Interpretation
A $2,500 to $3,000 cost per signed case looks very different depending on what that signed case is worth.
The median personal injury jury award runs $125,000 according to Insurance Information Institute data. At a standard 33 percent contingency fee, the average signed PI case generates approximately $40,000 in gross revenue for the firm. A $2,790 cost per signed case represents 7 percent of gross revenue on a median case.
But PI firms don't sign median cases uniformly. Case mix matters. A firm signing a high volume of minor soft-tissue cases at $8,000 to $12,000 settlements is paying 23 to 35 percent of gross case revenue in acquisition cost. A firm that signs catastrophic injury cases at $500,000+ pays under 1 percent. The cost per signed case number means nothing in isolation — it only has meaning relative to the expected value of the cases being signed.
Most PI marketing dashboards report cost per lead, not cost per signed case, and not cost per signed case relative to case value. All three numbers are required to make a rational channel allocation decision. Understanding how to calculate full marketing contribution margin per case type is the next step after cost per signed case is reconciled.
The Seven Cost Layers That Apply to PI Acquisition
Intake rejection is the largest single gap between dashboard CPL and true cost per signed case in personal injury — but it is not the only cost layer being missed. As documented in the seven cost layers framework, PI acquisition carries additional layers that most marketing reporting never captures:
Platform fees (Layer 1): Google Ads, LSA, and programmatic channels all apply fees and markups above the published CPC. These compress 2.9 to 5 percent off every paid-media dollar before any lead is generated.
Lead vendor markups (Layer 2): Lead aggregators and shared lead vendors sell the same lead to multiple firms simultaneously. The $150 CPL from a lead vendor is often a $300 lead split two ways — and the conversion rate on shared leads runs significantly below exclusive leads, compounding the true CPSC on that channel.
Compliance overhead (Layer 6): TCPA compliance requirements for PI lead generation add measurable cost per contact — documentation, consent verification, revocation infrastructure. Most firms track these costs in legal budgets, not marketing budgets, which means they never reconcile back to channel-level acquisition cost.
Variable acquisition costs (Layer 7): Intake staffing, attorney review time, CRM management for rejected files. These are the costs that turn a $400 CPL into a $2,790 CPSC — and they are invisible to every marketing platform the firm uses.
How to Reconcile True Cost Per Signed Case
If you want to calculate your true cost per signed case before automating the reconciliation, here is the methodology. This requires data from three systems: the ad platform, the CRM intake log, and the firm's time-tracking or billing records.
- 1Pull every signed retainer for the period from the CRM. Not leads. Not intake contacts. Signed cases with retainer dates. This is your denominator.
- 2Attribute each signed case to its originating channel. Google Ads, LSA, TV, referral, lead vendor — each signed case needs a channel tag. This requires intake tracking that goes beyond the ad platform's last-click attribution.
- 3Sum all channel spend for the period by channel. Do not blend. Calculate cost per signed case by channel separately — the channel-level numbers are where the actionable decisions live.
- 4Calculate intake processing cost for rejected leads. Multiply rejected lead volume by average intake staff cost per contact. Add attorney review time for files that reached attorney review and were rejected. These costs belong in the acquisition calculation.
- 5Add TCPA compliance overhead. Consent documentation, revocation processing, and any legal review costs for the lead generation operation. Divide by signed cases to get per-case compliance cost.
- 6Calculate reconciled CPSC by channel. Total channel spend plus allocated processing costs divided by signed cases from that channel. This is the number that supports rational budget allocation.
The result will show you which channels are actually producing signed cases at a cost that makes sense relative to case value — and which channels look cheap on CPL but expensive on CPSC after the intake math is done. The true CAC analysis covers the broader framework for why dashboard metrics consistently understate acquisition cost across every channel.
How CDAI Reconciles Cost Per Signed Case Automatically
CDAI — the Cost Distortion Analytics Intelligence engine built by Allocera Intelligence — connects your ad platforms, CRM intake records, and operational cost data to calculate true cost per signed case automatically across all seven cost layers. The engine does not stop at cost per lead. It reconciles intake rejection rates, processing costs, and all downstream acquisition costs against every campaign in your account.
The output is a campaign-level reconciled CPSC — not what the platform reported, but what you actually paid per signed retainer after everything downstream clears. The engine then issues directives: Scale, Hold, Cut, Pause, or Flag — with confidence scores and reason codes for every campaign. Each directive is retested 30 days later and scored for accuracy. See how the engine calculates true cost per signed case step by step.
For PI firms, this means knowing before the end of the month which channels are producing signed cases at a cost that makes sense relative to your case mix — and which channels are filling the intake queue with leads that intake will reject, at $300 to $500 per lead in media spend.
The free 30-Day Distortion Audit pulls your last 90 days of campaign data, reconciles cost per signed case across all channels including intake processing costs, and delivers a channel-by-channel CPSC breakdown with directive recommendations. No cost, no commitment.
Find Out What You're Actually Paying Per Signed Case
The 30-Day Distortion Audit reconciles your last 90 days of campaign data across all cost layers — including the intake rejection costs your dashboard never shows. Channel-by-channel cost per signed case. No cost, no commitment.
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