Why Most PI Firms Can't Answer Their Managing Partner's Most Important Question

At some point in every PI firm's growth trajectory, a managing partner sits across from the marketing director and asks a direct question: “What's our actual return on marketing investment?”

It's a reasonable question. The firm is spending $200,000, $400,000, or more per month on marketing. The managing partner wants to know whether that investment is producing an acceptable return — not just whether leads are coming in, but whether those leads are turning into profitable cases.

Most marketing directors can't answer this question precisely. Not because they aren't capable, and not because they haven't tried. The answer genuinely requires connected data that most PI firms haven't assembled.

What the Question Is Really Asking

When a managing partner asks about marketing ROI, they're asking a deceptively simple version of a complex calculation. The full form of the question is: “For every dollar we spend on marketing, how many dollars of net revenue do we eventually receive — and which channels produce the best returns?”

To answer that precisely, you need:

1. Total marketing spend, broken down by channel and vendor
2. Number of signed cases produced by each channel and vendor
3. Settlement amounts for cases from each channel, after fees and costs
4. A way to match items 1, 2, and 3 together across a timeline of 6 to 24 months

Each of those four requirements sounds straightforward. In practice, most PI firms have problems with all four.

Total Spend Is Harder to Track Than It Seems

Most firms can produce a rough total for monthly marketing spend. The difficulty is getting it broken down accurately by channel and vendor, reconciled against what was actually delivered, and recorded consistently over time.

Marketing spend in a typical PI firm is split across:

• Pay-per-call vendor invoices (often monthly, sometimes 60-day net)
• Google Ads charges (billed to a credit card, not an invoice)
• Facebook Ads charges (also credit card, separate ad accounts)
• TV and radio buys (often bought through an agency)
• LSA spend (billed through Google, different portal than standard Ads)
• Agency retainers covering multiple channels
• Billboard and outdoor (annual or quarterly contracts)

Pulling all of this into a single, accurate monthly spend figure broken down by source requires reconciling data from six to ten different billing sources. Most firms either skip the reconciliation (working from rough estimates) or do it manually once a month with significant time investment.

Signed Cases Without Source Attribution Are Useless for ROI

Your case management system knows how many cases you signed. But does it know, with reliable accuracy, which marketing channel produced each case?

For most PI firms, the answer is: partially. Lead source is tracked in the CMS, but the accuracy depends entirely on intake data entry quality. If lead source is missing or imprecise on 15 to 25% of signed cases — which is common — then your ROI calculation has a fundamental gap. You can't credit 85% of cases to known channels and reach a meaningful conclusion about those channels' ROI.

Settlement Data Is the Missing Link

Here's where most ROI calculations fall apart completely: connecting settlement revenue back to the marketing source.

A case settles in October 2025. Your firm receives a fee. That's a revenue event that belongs in your marketing ROI calculation. But which vendor produced the lead that became this case? The case was signed in April 2024. The lead arrived in February 2024. Somewhere in your intake records from 20 months ago is a lead source notation — if your intake team recorded it accurately and if that record has been maintained through case transfers, system changes, and staff turnover.

This 18-month data chain is fragile. Each link depends on consistent process and clean data entry going back nearly two years. Firms that haven't built that foundation can't answer the settlement-based ROI question because the connective tissue isn't there.

The Rearview Mirror Problem Adds Confusion

Even when all the data is available, comparing this month's spend to this month's revenue received produces a misleading number. The settlements you receive this month are from cases signed 12 to 18 months ago. The marketing spend that produced those cases was made 12 to 18 months ago. Your current marketing spend is producing cases that won't settle for another 12 to 18 months.

Dividing current revenue by current spend produces a number, but it doesn't measure what the managing partner actually wants to know. A cohort-based approach — tracking what cases from a specific marketing period eventually settled for — is more accurate but requires 12 to 18 months of patience before the numbers stabilize.

What Marketing Directors Can Actually Tell Their Partners

Given these constraints, the most useful thing a marketing director can provide in the short term isn't a precise ROI number — it's a cost per signed case by vendor, combined with a case mix analysis.

Cost per signed case answers: “How much did we spend to acquire each case, by channel?” It's measurable within 60 to 90 days, requires only intake data and billing reconciliation, and gives the managing partner the information they need to evaluate vendor performance and budget allocation.

The settlement ROI answer comes later — as a 12 to 18 month retrospective on cohorts of cases. It's more complete, but it requires the patience to build the data foundation now and wait for settlements to arrive.

What It Takes to Be Able to Answer the Question

PI firms that can answer the managing partner's question with real precision have built three things:

• A spend tracking system that reconciles marketing costs monthly by vendor and channel, not just by total.
• Consistent lead source attribution at intake — every signed case tagged to its source with enough specificity to identify the vendor and campaign.
• Settlement tracking by intake cohort— connecting cases by their sign date to their eventual settlement outcome, making it possible to calculate how much revenue a given month's marketing investment ultimately produced.

Building these three things is a 12 to 18 month project. But every month you delay starting is another month of decisions made on incomplete data — and another month the managing partner has to accept an incomplete answer to their most important question.