Cost Per Lead vs. Cost Per Signed Case as a Vendor Evaluation Metric
When comparing lead vendors, cost per lead is the easiest number to compare side by side — but it isn't necessarily the number that reflects what a vendor is actually worth to the firm.
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Cost Per Lead
The upfront price paid per lead, transfer, or call, before any qualification or conversion has happened.
- Simple, immediate number to compare across vendors
- Easy to budget against a fixed spend target
- Says nothing about how many of those leads actually convert
- A cheaper lead that rarely converts can be more expensive overall than a pricier, better-qualified one
Cost Per Signed Case
Total spend with a vendor divided by the number of cases actually signed as a result.
- Reflects what a vendor actually costs relative to real business results
- The metric that ultimately determines whether a vendor is worth the spend
- Makes it possible to fairly compare a cheaper, lower-quality source against a pricier, better-qualified one
- Requires tracking cases all the way from lead source through signing
- Takes longer to calculate than a simple per-lead price
Which one makes sense for you?
Cost per lead is useful for quick, apples-to-apples budget comparisons, but it's ultimately a vanity metric if it's the only thing being measured — a lower price per lead doesn't matter if those leads rarely convert. Cost per signed case is the metric that actually reflects vendor value, and firms that can track it consistently make meaningfully better vendor decisions over time.
Key cost factors.
- Whether the firm currently tracks case source through to signing
- How much qualification/exclusivity varies between vendors being compared
- CRM or intake software capability to attribute signed cases to source
- Practice area conversion rate norms
Before you decide.
- Do we currently track which lead source each signed case came from?
- Is a cheaper vendor actually producing a lower cost per signed case, or just a lower cost per lead?
- How long is a fair evaluation window before comparing vendors on this metric?
Frequently asked questions.
How long should a firm evaluate a vendor before drawing conclusions?
This depends on the practice area's typical case cycle, but evaluating too early — before enough leads have had a chance to move through qualification and signing — can produce misleading conclusions in either direction.
All figures on this page are illustrative examples for general education, not quotes, appraisals, or guarantees of actual pricing. Actual costs vary by provider, location, project scope, and market conditions — always get a specific quote before making a purchasing decision.
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