Personal injury law firms do not all value cases equally, and they should not. A motor vehicle accident with soft tissue injuries and no surgery has a fundamentally different financial profile than a commercial vehicle accident with a fractured spine. Treating them as equivalent in your marketing analysis — because both show up as “one signed case” in your intake report — produces a distorted picture of which lead sources are actually working for your firm.
Case severity analysis is the practice of classifying signed cases by injury type, complexity, or projected value, and then attributing that classification back to the lead source that generated the case. It turns your intake data into a lens for evaluating your lead generation strategy — not just how much you paid per case, but what kind of cases you are buying.
Why Case Volume Is the Wrong North Star
Most PI marketing programs optimize for case volume. The vendor who delivers more signed cases per dollar wins budget. The Google Ads campaign that drove the most signings last quarter gets the highest allocation next quarter.
This approach is rational if all cases have roughly equivalent value. It breaks down when the case mix varies significantly by source — which it almost always does.
Consider two vendors at the same price point: $800 per signed case. Vendor A produces cases with an average projected value of $22,000 in fees. Vendor B produces cases with an average projected value of $65,000 in fees. If you are optimizing for case volume, these two vendors look identical. If you are optimizing for case value, Vendor B produces nearly three times the expected return on the same acquisition cost.
Scaled to a $60K monthly allocation, the difference is roughly 75 cases at $22K average value ($1.65M projected revenue potential) versus 75 cases at $65K average value ($4.875M projected revenue potential). Both produce the same number of cases. The value difference is $3.2M.
Case severity analysis is how you see that difference before it shows up — or doesn't — in your settlements 18 months from now.
Building a Case Severity Classification System
The first step is defining your severity tiers. Most PI firms find that three to five tiers capture the meaningful distinctions in their case mix without creating classification complexity that intake or case management staff won't reliably maintain. RevenueScale's case analytics module tracks severity distribution by lead source automatically once tiers are defined.
A practical four-tier system for motor vehicle accident cases:
- Tier 1 — Minor: Soft tissue injuries, no surgery, medical treatment under $10,000, no permanent impairment. Typical fee range: $3,000–$12,000.
- Tier 2 — Moderate: Documented treatment, potential for minor surgical procedures or significant PT, no permanent impairment. Typical fee range: $10,000–$35,000.
- Tier 3 — Significant: Surgery, hospitalization, or documented permanent impairment. Typical fee range: $30,000–$100,000.
- Tier 4 — Catastrophic: Severe or permanent disability, fatality, traumatic brain injury, spinal cord injury. Typical fee range: $100,000 and above.
Your specific tiers and fee ranges will depend on your market, your case types, and your historical settlement data. The exact structure matters less than consistency — once defined, every signed case should receive a severity tier assignment as part of the case opening workflow.
What Case Severity Data Reveals by Lead Source
When you have 90–180 days of severity-classified cases with source attribution, several patterns typically emerge.
Severity Concentration by Source
Different lead sources produce different severity distributions. Organic search leads — people who searched for a PI attorney after a serious accident — tend to skew toward higher severity. Aggregator leads — people whose information was sold to multiple firms — tend to skew toward lower severity. Television leads vary widely depending on the creative and the market.
When you see that one vendor is producing 80% Tier 1 cases and your portfolio average is 50% Tier 1, that vendor is pulling your average case value down significantly. The question is whether the lower cost per case from that vendor compensates for the lower average value — or whether you are effectively subsidizing a low-value case volume at the expense of your overall case quality.
Value-Adjusted ROI by Source
Standard marketing ROI calculations for PI firms typically look at cost per signed case relative to expected settlement multiples. Case severity analysis lets you refine this calculation significantly.
For each lead source, you can now calculate:
- Average projected fee per signed case (weighted by severity tier distribution)
- Cost per signed case
- Estimated marketing ROI multiple (projected fee ÷ acquisition cost)
A source producing cases at $900 acquisition cost with $30,000 average projected fee has an estimated 33x ROI multiple. A source producing cases at $700 acquisition cost with $12,000 average projected fee has an estimated 17x ROI multiple. The cheaper source is less efficient on a value-adjusted basis, even though it is lower cost on every standard metric.
Severity Trend by Source Over Time
Case severity mix from a given source can shift over time — a signal that the vendor has changed their acquisition method, their targeting, or their lead generation tactics. A vendor whose Tier 3 and Tier 4 case rate was 22% six months ago and is now 8% has likely changed something in how they are generating leads.
Severity trend analysis by source is an early warning system for lead quality degradation that conversion rate and rejection rate may not catch immediately. A vendor can maintain a stable conversion rate while quietly shifting to a lower-value case mix. Severity tracking catches that shift.
How to Use Severity Data in Your Lead Generation Strategy
Case severity analysis informs lead generation strategy in three specific ways.
Vendor Portfolio Optimization
When you can compare value-adjusted ROI across your vendor portfolio, budget allocation decisions change. Vendors who consistently produce higher-severity case mixes — even at higher cost per lead or cost per case — may deserve larger allocations than their volume metrics suggest. Vendors who are producing volume but low-value case mixes may deserve budget reduction even if their conversion rate looks acceptable.
Campaign Targeting Adjustments
For owned channels — Google Ads, Facebook, programmatic display — severity analysis tells you which keyword clusters, audience segments, or creative themes are producing higher-severity cases. This is actionable at the campaign level. If car accident keywords are producing primarily Tier 1 cases and trucking accident keywords are producing Tier 3 and above, that information should drive your bidding strategy and budget split between those keyword categories.
Intake Criteria Calibration
If severity analysis reveals that a specific source is producing a high proportion of low-severity cases, one response is to tighten your intake criteria for that source — raising the threshold for signing cases from that vendor. This is a nuanced decision that requires collaboration with intake and case management, but it is a legitimate tool for improving the quality of your signed case portfolio without necessarily cutting the vendor.
The Lag Problem and How to Work Around It
The fundamental challenge with case severity analysis is that the outcomes that validate severity assessments — settlements and fee collection — happen 12–36 months after signing. You are classifying cases at intake based on projected severity, and the actual severity only becomes fully clear when the case resolves.
This does not make severity analysis less useful. It means you need to calibrate your severity tier definitions against your historical settlement data and revisit your classification assumptions annually. Over time, you will develop increasingly accurate mappings between initial severity assessments and actual settlement outcomes by case type — making your projected value estimates more reliable as a planning tool.
In the meantime, even rough severity tiers tell you something important: which sources are sending you cases with higher injury severity at intake. That leading indicator is meaningful even before the downstream data exists to validate it fully.
The firms that will win on marketing ROI in PI law are the ones that stop measuring lead generation performance by volume and start measuring it by value. Case severity analysis is the tool that makes that possible — and it connects directly to your vendor performance data when the data infrastructure is in place.
Related guide: See our complete guide to PI lead generation by case type — how marketing economics change by practice area, with CPC benchmarks and channel strategies for each case type.
Related guide: See our complete guide to PI intake performance — the 8 metrics every PI firm should track, benchmarks, and how to connect intake data to marketing attribution.