Your $250 CPA Is Actually $600. Here's Where the Rest Hides.

I talk to plaintiff firms every week that can tell me their cost-per-lead down to the penny. They know their Google Ads CPC, their Meta conversion rate, their intake vendor's per-lead fee. They've built dashboards. They've optimized.

And almost none of them can tell me what it actually costs to get a claimant from "clicked an ad" to "arbitration demand filed with their name on it."

That second number is the one that determines whether the matter makes money. The first number is just where the spending starts.

The funnel nobody measures

Here's what a typical mass arb claimant acquisition funnel looks like, stage by stage, with the cost layers that accumulate at each step:

1. Cost per lead (CPL). What you pay to get a name and phone number. For consumer statutory claims in 2026, this runs $30 to $120 depending on the channel and the statute. For higher-value employment or fintech claims, $80 to $200+.
2. Cost per qualified lead (CPQL). After intake screening, jurisdiction checks, and basic eligibility filtering, you lose 30 to 50 percent of raw leads. Your $60 CPL just became $90 to $120.
3. Cost per signed client (CPS). The retainer or fee agreement stage. Another 20 to 40 percent drop-off between qualified and signed, because people don't return calls, change their minds, or fail document requirements. Now you're at $150 to $250.
4. Cost per verified, filed claimant. ID verification, deduplication, demand preparation, and actual filing with the provider. Another 15 to 30 percent attrition. Your real number: $200 to $400 for low-value consumer claims, $400 to $800+ for higher-value matters.

That $60 lead became a $350 filed claimant. And if you're only watching the $60 number, you're greenlighting matters that look profitable but aren't.

Why this matters more in mass arb than mass tort

In mass tort, individual case values are high enough that acquisition cost math is forgiving. If a case is worth $50,000 to $200,000 in expected fee, a $2,000 all-in acquisition cost is noise.

Mass arbitration is different. Per-claimant settlement values in consumer statutory matters often land between $300 and $2,000. At a 33 percent contingency, your gross fee per claimant is $100 to $660. That means your cost-per-filed-claimant isn't just a line item. It's often the single largest variable determining whether the matter is profitable or underwater.

When you're running 5,000 claimants and your real cost-per-filed is $150 higher than you thought, that's $750,000 in margin you modeled but will never see.

Where the hidden costs actually sit

Three categories of cost consistently get left out of the CPA number firms track:

1. Intake labor and technology. Whether you run intake in-house or through a vendor, there's a per-lead cost to screen, qualify, and follow up. Intake vendors charge $15 to $40 per qualified lead on top of your media spend. In-house teams have loaded labor costs that rarely get allocated back to individual matters. Either way, it's real money that doesn't show up in the "marketing CPA" dashboard.

2. Verification and deduplication. ID verification isn't optional in mass arb, especially post-FRCP 16.1 scrutiny of plaintiff verification. Third-party ID verification adds $2 to $8 per claimant. Deduplication (catching the same person signed by two firms, or signed twice through different lead sources) requires tooling and manual review. The dual-representation problem alone can eat 5 to 10 percent of a claimant pool if your chain-of-custody tracking is loose.

3. The "signed but never filed" gap. This is the biggest one. A claimant signs a retainer but then goes dark when you need a declaration, a screenshot, or a response to a verification question. If your outreach to those signed-but-incomplete claimants is a couple of emails and a voicemail, you'll lose 20 to 30 percent of your signed pool before filing. Every one of those is acquisition cost you spent and will never recover.

The signed-but-never-filed gap is an operations problem, not a marketing problem

This is where I'm biased, so I'll say it plainly: I run a completion stack. But the math is the math.

If your cost-per-signed-claimant is $200 and you lose 25 percent of signed claimants before filing because they didn't respond to your follow-up, your effective cost-per-filed just jumped to $267. On 5,000 signed claimants, that gap represents $333,000 in wasted acquisition spend and 1,250 claimants you paid for but never filed.

The fix isn't spending more on leads. It's building a persistent outreach sequence (SMS, email, branded caller ID, AI-assisted follow-up) that converts signed claimants into filed claimants at 85 to 95 percent instead of 70 to 75 percent.

The difference between a 75 percent and a 90 percent signed-to-filed rate on a 5,000-claimant matter at $200 CPS is roughly $167,000 in recovered acquisition cost. That's not a tech feature. That's a line item on your P&L.

How to model this correctly

If you're evaluating a mass arb matter or building a practice, here's a simple framework:

1. Start from the back. What's the expected per-claimant settlement value? What's your fee percentage? That gives you gross revenue per filed claimant.
2. Subtract servicing costs. Filing fees you advance (AAA consumer filing is $200 per claimant, with tiered admin fees on top), admin costs, claimant communications through resolution, disbursement.
3. The remainder is your acquisition budget ceiling. If your gross fee per claimant is $400 and your servicing cost is $150, you can spend up to $250 per filed claimant on acquisition before the matter goes negative.
4. Now measure your real funnel. Track CPL, CPQL, CPS, and cost-per-filed separately. If your cost-per-filed exceeds your ceiling, the matter doesn't pencil, no matter how good the CPL looks.

The firms that run mass arb profitably aren't the ones with the lowest CPL. They're the ones who know their cost-per-filed and have built the operational infrastructure to keep the signed-to-filed conversion rate above 85 percent.

The number worth watching

Next time you're reviewing a mass arb campaign, ask one question: what is our cost per filed claimant? Not cost per lead. Not cost per signed. Cost per filed.

If nobody can answer that, you have a measurement problem. And measurement problems become P&L problems at scale, every time.