A managing partner reviews the quarterly marketing report and smiles: 400 inquiries at $85 each. Then the controller shows the other column. Eleven signed cases. The real number was never $85. It was $3,090, and nobody had been tracking it.
Most firms still judge marketing by what is easy to count: clicks, calls, form fills, cost per inquiry. Those numbers describe activity, not growth. The metric that connects spend to revenue is your cost per signed case, and once you measure it channel by channel, budget decisions get much simpler.
This guide explains how to calculate cost per signed case, what moves it, and how to use it to steer client acquisition spend with confidence.
What Cost Per Signed Case Actually Measures
Cost per signed case is total acquisition spend for a channel divided by the number of retained clients that channel produced. Spend includes media, platform fees, agency fees, and the staff time your intake team invests. Signed means a fully executed engagement agreement, not a promising consultation.
The formula is simple, but the discipline is in the denominator. A channel with a cheap inquiry price and a poor close rate can cost two or three times more per signed client than a pricier channel that sends better-qualified prospects. Cost per inquiry rewards volume. Cost per signed case rewards quality.
| Metric (illustrative) | Inquiry-Based Thinking | Signed-Case Thinking |
|---|---|---|
| Monthly spend | $10,000 | $10,000 |
| Inquiries received | 120 | 120 |
| Cost per inquiry | $83 | $83 (tracked, not trusted) |
| Signed cases | 6 | 6 |
| Cost per signed case | Unknown | $1,667 |
| Decision it supports | Buy more volume | Fix the weakest stage first |
Two firms can spend the same amount and report the same inquiry volume, yet one grows twice as fast. The difference almost always sits between the first contact and the signed agreement.
How to Calculate Cost Per Signed Case by Channel
Start with a source field on every intake record. Whether the prospect came from Google Ads, the Map Pack, a referral partner, or an exclusive inquiry program, that label must follow the matter from first call to signed agreement. Without it, every number downstream is a guess.
Then work through four steps each month:
- Total the fully loaded spend for each channel, including fees and intake labor.
- Count inquiries, qualified consultations, and signed cases for that same period.
- Divide spend by signed cases for your cost per signed case.
- Compare against case value, using average fee or expected settlement share for your practice area.
For contingency practices, remember the lag. A personal injury case signed in March may not pay out until next year, so judge channels on a rolling six-month view and pair cost per signed case with expected fee per matter.
Key Insight
A cost per signed case of $2,500 is excellent on a matter worth $20,000 in fees and unsustainable on one worth $3,000. Always read the metric against case value, not in isolation.
Four Levers That Lower Your Cost Per Signed Case
Once the number is visible, improvement comes from four places, and they are rarely about spending more.
1. Prospect quality
Geography, practice area, and case criteria filtering at the source remove inquiries your team could never sign. Fewer wasted consultations means your best attorneys spend time only on viable matters.
2. Speed to contact
Prospects usually contact several firms. Responding within minutes, by phone first and text second, routinely lifts conversion without adding a dollar of media spend.
3. Intake consistency
A scripted, trained intake process with defined follow-up cadences prevents warm prospects from going cold. Track conversion by intake specialist to find coaching opportunities.
4. Channel mix
Shift budget gradually toward channels with the lowest cost per signed case relative to case value, and cap anything trending the wrong way. Treat every reallocation as a test with a defined review date.
A common mistake: cutting a channel because its cost per signed case looks high after only a few weeks. Small samples swing wildly. A channel that produced two signed cases from $3,000 looks expensive until the next month brings five. Set a minimum sample, such as ten qualified consultations, before drawing conclusions.
The opposite error is just as costly: protecting a channel because it feels familiar. Referral relationships and legacy directory listings deserve the same scrutiny as paid media, and the numbers will tell you honestly which ones earn their place.
Building a Cost Per Signed Case Dashboard
You do not need expensive software. A shared spreadsheet fed by your case management system works, provided it is updated weekly and reviewed by someone with authority to move budget. Include source, inquiries, consultations, signed cases, spend, and cost per signed case for each channel, with a trailing three-month trend.
Review it in a monthly growth meeting with one rule: every channel either earns more budget, holds steady, or gets a fix-it plan with a deadline. That rhythm turns marketing from an expense line into a managed pipeline, which is how a legal growth partner thinks about client acquisition.
Summary: Cost Per Signed Case Checklist
- Track the source — tag every inquiry through to signature.
- Calculate monthly — fully loaded spend divided by signed cases.
- Compare to case value — a good number depends on fee potential.
- Pull the four levers — quality, speed, intake consistency, channel mix.
- Review on a schedule — reallocate budget in a monthly growth meeting.
Build a Pipeline You Can Measure
Exclusive, filtered client inquiries matched to your practice area and territory, so every dollar is easier to trace to a signed case.