The Right Way to Report Cost Per Case to a PI Managing Partner

Picture this: a managing partner asks what a signed case costs from your top lead vendor. You have the number. But the moment you say it, the follow-up questions start — compared to what? Is that good? What are we doing about it? — and the conversation goes sideways.

That's not a data problem. It's a framing problem. Cost per case is the right metric. How you present it determines whether it drives a budget decision or just fills a slide.

This article covers exactly that: how to calculate cost per case correctly, how to frame it for a managing partner conversation, and what context turns a number into a recommendation.

Why Cost Per Case Is the Right Metric

Most PI firms track cost per lead. Vendors send invoices, lead counts get logged, the division is easy. The problem: cost per lead answers the wrong question. It tells you what you paid for a contact — not what you paid for a client.

Two vendors with the same cost per lead can produce wildly different results when you follow leads through to signed cases:

• Vendor A:100 leads at $150 each = $15,000. 10 signed cases. Cost per case: $1,500.
• Vendor B:100 leads at $150 each = $15,000. 3 signed cases. Cost per case: $5,000.

Looking at cost per lead, these vendors are identical. Looking at cost per case, one produces clients at a third of the cost of the other. That's the difference one metric makes in a budget conversation.

How to Calculate Cost Per Case Correctly

The formula is simple: total marketing spend divided by total signed cases over the same period. But before you walk into a managing partner meeting, there are three implementation decisions that determine whether your number holds up.

Use a 90-Day Window for Vendor-Level Calculations

Monthly signed case volumes are lumpy. A vendor might produce 2 cases one month and 8 the next — lead quality variance, intake scheduling, response time all play a role. A single month's calculation is noise. A 90-day rolling window gives signal.

Example: Vendor C spent $120,000 over three months. 28 cases signed from their leads. Cost per case: $4,286. That number is defensible. Any single month's version isn't.

Track the Attribution Window Clearly

Cost per case depends on when you count a case as “signed.” If you count at signing — which is correct — the marketing spend in your denominator should reflect when those leads were generated, not when they signed. Lead-to-sign timelines run 2 to 6 weeks, so March spend may produce April and May cases.

For managing partner reporting: use same-period spend and cases as your baseline, and note the lag explicitly. That transparency builds credibility. For most firms, same-period is accurate enough for strategic budget decisions.

Separate Fully Loaded Cost Per Case from Direct Spend

Direct cost per case: lead spend divided by cases signed. Fully loaded cost per case: same calculation, but including staff time, technology, and overhead. Both matter — just for different conversations:

• Direct cost per caseis the right metric for evaluating vendor performance.
• Fully loaded cost per caseis the right metric for partner conversations about total marketing efficiency.

Be explicit. “Our direct cost per case from paid vendors averaged $3,800 in Q1” is a different statement than “our fully loaded cost per case — including staff and technology — averaged $5,200.” Both are accurate. Conflating them in the same report creates confusion that undermines the whole conversation.

How to Frame Cost Per Case for Leadership

The number alone is useful. The number in context is actionable. There are three frames that consistently land in managing partner conversations.

Frame 1: Against Your Firm's Own Threshold

Every firm has — or should have — a maximum acceptable cost per case. Derive it from case economics: if your average case settles for $45,000 at a 33% contingency, that's roughly $15,000 in attorney fees per case. A $5,000 cost per case puts acquisition at about 33% of fee revenue. Whether that's acceptable depends on your firm's margins — but once you have a threshold, every vendor evaluation becomes binary.

Present it that way: “Our threshold is $5,000. Vendors A, B, and E are below it. Vendors C and D are above. Here's my recommendation.” Managing partners make decisions. Give them the binary, then the next step.

Frame 2: Against Prior Periods

Trend beats any single data point. Firm-wide cost per case moving from $4,800 in Q3 to $4,100 in Q4 is a 15% improvement in marketing efficiency — a number a managing partner can tie to business outcomes.

Include a 6- or 12-month trend line in quarterly reviews. It shows that your decisions compound over time and that the investment in tracking produces measurable returns.

Frame 3: Relative to Case Value

Cost per case is most persuasive when it's expressed as a ratio to case value. Average case value of $45,000 and a cost per case of $3,800 means you're spending 8.4 cents to acquire each dollar in case value. That framing mirrors how partners evaluate any business investment — not “is this number good?” but “what does it return?”

One caveat: this requires settlement data, which carries a 6 to 18 month lag. Firms with lead-to-settlement attribution can have this conversation in real terms. Firms without it can approximate using historical average case values — just be transparent about the methodology.

The Conversation to Avoid

The most common mistake: presenting cost per case defensively. When a managing partner asks why Vendor X is running $7,000 per case, the wrong answer is a list of reasons why that number isn't as bad as it looks.

The right answer: “It is that high. Here's what I'm doing about it.” Then present the recommendation — cut the budget, pause the vendor, set a 60-day performance window with specific thresholds.

Managing partners trust marketing directors who own bad data. They lose trust in ones who explain it away. Come in with the problem and the plan, every time.

What Good Reporting Infrastructure Looks Like

Accurate cost per case reporting requires connected data. Marketing spend lives in vendor invoices. Signed cases live in your CRM or case management system. Attribution — which lead became which signed case — lives somewhere in between, and that's where most PI firms break down.

Firms using a revenue intelligence platform track cost per case in real time, by vendor, without monthly reconciliation. The number is always current. When a managing partner asks “what's our cost per case right now?” — there's an immediate answer, not a two-week research project.

Firms doing this manually spend 15 hours a week on data assembly to produce a report that's already three weeks stale when it lands. That's not a foundation for the cost-per-case conversations that actually move budget in the right direction.

RevenueScale's real-time cost per case reporting gives managing partners the exact view they need — by vendor, by time period, updated continuously without a monthly reconciliation exercise.