What Does the Average PI Firm Spend Per Signed Case at Different Revenue Levels?

Cost per signed case is the single most important marketing metric for a personal injury firm — but it is also one of the least consistently defined. Different firms calculate it differently. Most don't calculate it at all.

This article establishes what PI firms actually spend per signed case at different revenue levels, why that number varies so widely, and what you should expect for a firm at your size and growth stage.

Why Cost Per Case Varies by Firm Size

Before getting into numbers, it's worth understanding why cost per case is not one static benchmark. Several factors drive meaningful variation by firm size:

• Lead source mix. Larger firms typically have more diversified lead source portfolios — a blend of referrals, paid search, lead vendors, and TV. Smaller firms often concentrate spend in one or two channels. The mix directly affects average cost per case.
• Intake efficiency. Firms with optimized intake teams convert a higher percentage of leads to signed cases — which reduces cost per case for the same spend. Intake efficiency tends to improve with scale.
• Case type focus. A firm focused exclusively on catastrophic injury cases will have a higher cost per case than a firm taking all motor vehicle accident cases — but also a significantly higher revenue per case.
• Market competitiveness. Firms operating in Los Angeles or New York pay substantially more per lead across almost every channel than firms in smaller or mid-size markets.

Cost Per Signed Case Benchmarks by Firm Revenue Level

These ranges reflect what PI firms typically spend per signed case across their total marketing spend — not per channel. All-in marketing cost divided by total signed cases from that marketing spend in the same period.

Firms Under $5M Annual Revenue (Typically 5–12 Attorneys)

Smaller PI firms typically see cost per signed case ranging from $800 to $2,500. At this revenue level, most firms rely heavily on referrals (which have very low effective cost per case) and a limited number of paid channels. The lower end of this range is achievable when referral volume is strong. The upper end reflects firms that are more dependent on paid channels with limited intake efficiency.

One common issue at this level: firms don't always attribute referral costs (time spent networking, event attendance, medical relationship maintenance) to their cost per case calculation. True cost per case often runs higher than reported when relationship- based marketing costs are included.

Firms at $5M to $15M Annual Revenue (Typically 12–25 Attorneys)

At this stage, most firms are investing meaningfully in paid lead generation alongside referral channels. Cost per signed case typically ranges from $1,500 to $4,000.

This is also the range where lead source mix starts to vary most significantly. A firm heavily dependent on shared aggregators might run a $3,500 cost per case, while a firm with well-optimized Google Ads campaigns and strong conversion might run $1,800 on the same revenue. The difference is lead quality and intake efficiency.

Firms in this revenue band are often the most likely to be making budget decisions on incomplete information. They have enough vendor relationships to make attribution complex, but not always the systems to track cost per case by source.

Firms at $15M to $40M Annual Revenue (Typically 25–50 Attorneys)

Mid-to-large PI firms typically see cost per signed case in the $2,500 to $6,000 range. Higher spend in competitive markets, broader lead source portfolios, and higher case quality standards all push this number up relative to smaller firms.

But here's what matters most at this scale: the variance between best and worst sources widens substantially. A well-optimized referral or exclusive lead channel might produce cases at $1,200 while a poorly performing aggregator is running $7,000 per case. Firms that can see this breakdown make dramatically different budget decisions than firms that only see blended averages.

At this revenue level, a 15% to 20% improvement in marketing efficiency — which RevenueScale clients typically achieve within 90 days — translates to several hundred thousand dollars per year in recaptured ROI.

Firms at $40M+ Annual Revenue (50+ Attorneys)

Larger PI firms often show cost per signed case ranging from $3,500 to $8,000+ depending heavily on case type. Firms pursuing catastrophic injury, mass tort, or aviation cases may have cost per case numbers well above this range — but average settlement values that justify the investment.

At this scale, marketing attribution becomes both most critical and most complex. Multi-channel attribution, long intake cycles, and 6 to 18 month settlement lags mean that without systematic revenue intelligence, the connection between marketing spend and case outcomes is almost impossible to see accurately.

The Components of Cost Per Case

Cost per signed case is not just the total marketing budget divided by signed cases. A complete cost per case calculation should include:

• Direct marketing spend: All lead generation costs — paid search, vendor invoices, TV and radio, social advertising, agency fees tied to lead generation.
• Intake labor costs: The time intake specialists spend screening and signing cases is part of the cost of generating each case. At $35 to $55/hour for experienced intake staff, this adds meaningfully per case.
• Marketing overhead: Marketing director salary, CRM costs, attribution software, and any internal time spent on vendor management — these belong in a fully-loaded cost per case calculation.

Most firms stop at direct marketing spend. The fully-loaded number is typically 20% to 40% higher when labor and overhead are included. For decision-making purposes, the direct spend number is often sufficient — but knowing the difference is important when calculating true case acquisition ROI.

What a “Good” Cost Per Case Actually Means

Cost per case is only meaningful in relation to average revenue per case. A $4,000 cost per signed case at a firm averaging $35,000 net attorney fee per case is very different from a $4,000 cost per case at a firm averaging $12,000 per case.

The metric that links these is case acquisition ROI: (Average Net Revenue Per Case ÷ Cost Per Case) × 100. Firms with a case acquisition ROI above 600% (spending $1 to produce $6 in net attorney fees) are generally in strong shape. Firms below 400% should investigate whether they're in the right channels and case types.

Why Most Firms Can't Calculate This Number

Over 80% of PI firms still track marketing ROI manually in spreadsheets. The challenge isn't willingness — it's the structural gap between where marketing spend data lives (invoices, ad platforms) and where case outcome data lives (case management systems and, eventually, accounting records).

The 6 to 18 month lag between lead generation and case settlement makes this harder. By the time a case settles, the lead that generated it is 12 months old in a spreadsheet — and connecting the two requires either excellent manual discipline or a system built to handle the attribution window automatically.

Using Cost Per Case to Drive Decisions

Once you know cost per case by source, the decisions become clearer:

• Scale sources where cost per case is below your target threshold and case quality is strong.
• Put sources above your threshold on a 60-day improvement window with clear benchmarks before making budget cuts.
• Don't evaluate new sources on cost per lead — evaluate them on a 90-day trial that tracks cost per case on the leads they send.
• Report cost per case by source to your managing partners as the primary marketing accountability metric. It's the number that translates marketing activity into business outcomes.

Firms that implement cost per case tracking by source typically find they can shift budget to achieve 15% to 20% better case production from the same total marketing spend — within 90 days. That's the practical value of the metric.

RevenueScale's cost per case tracking connects your marketing spend to signed case outcomes automatically — so you can see your number by source, without manual spreadsheet work.