Here's a number that should make you rethink your 2026 pipeline: AAA administered 92 mass arbitrations in 2024, covering more than 280,000 individual claims. The number of distinct mass arbitration matters stayed relatively stable year over year. But individual filings per mass case went down.
Most people read that as a cooling signal. I read it as the market getting smarter.
The firms that are winning right now are not the ones filing the most claims. They are the ones filing the right claims, with tighter qualification, better completion infrastructure, and a clear picture of what each claimant actually costs from intake to payout. The volume era of mass arb is giving way to the margin era. And if you are still modeling your matters on claimant count alone, you are probably leaving six figures on the table.
The Volume Play Had a Shelf Life
From 2021 through early 2024, the playbook was straightforward. Find an arb-eligible defendant, spin up a campaign, acquire as many claimants as possible, file at AAA or JAMS, and let the fee pressure do its work. The math was simple: more filings meant more cost pressure on the defendant, which meant faster settlement.
It worked. Until it didn't.
Defendants responded. They rewrote clauses to include bellwether and batching provisions. They shifted to NAM and ADR Services, where supplemental mass filing rules let a Process Arbitrator stage cases in tranches of 25 or 50 instead of letting 5,000 hit at once. They added pre-arbitration informal resolution steps that toll the clock for months before a single case moves.
The result: filing 10,000 claims no longer creates the same pressure it did two years ago if the defendant's clause only lets 50 proceed at a time. The leverage moved from volume to velocity, and velocity depends on how efficiently you can move each individual claimant through the process.
The Per-Claimant Lifecycle Cost Nobody Models
Ask most plaintiff firms what their CPA is on a mass arb matter, and they will give you a number. Maybe $340 on Meta, $510 on search. That is the front-door cost. It is real, and it matters.
But it is not the number that determines whether the matter pencils out.
The number that matters is the cost to produce a completed claimant: someone who signed the retainer, submitted documentation, passed ID verification, responded to outreach during the completion window, and signed the release when the settlement lands. That is a fundamentally different calculation.
Here is how the math tends to break in practice. You acquire 5,000 claimants at $400 each. That is $2 million in acquisition spend. Of those 5,000, maybe 3,800 complete intake. Of those 3,800, maybe 3,200 respond to at least one outreach attempt during the completion window. Of those 3,200, maybe 2,700 actually sign the release. Your effective cost per completed claimant is not $400. It is $741.
And if your settlement agreement has an 85% release threshold, you need 4,250 completions out of 5,000. At the conversion rates above, you are short by 1,550 claimants. Which means you either acquire more (at rising marginal CPAs) or you fix completion. One of those is expensive. The other is operational.
Why Fewer Filings Per Case Is Actually Good News
The decline in individual filings per mass arbitration is not a sign that mass arb is shrinking. The 2026 projections point upward. What it signals is that firms are getting more selective about which claimants they file.
This is healthy. Filing a claimant who will never respond to outreach, never complete ID verification, and never sign a release is not free. It costs you AAA or JAMS filing fees (even under the new flat-fee structures, there are per-case components that tier). It costs your admin time. And it costs you threshold math, because that claimant sits in your denominator pulling your completion percentage down.
The firms running tighter operations are qualifying harder at intake, disqualifying claimants who show signs of disengagement early, and investing in completion infrastructure that lifts the conversion rate on the claimants they do keep. Fewer filings. Higher completion. Better economics.
The Completion Stack Is Where Margin Lives
If the leverage in mass arb used to live at filing, it now lives at completion. The firms that hit their release thresholds weeks or months ahead of schedule are not doing it with a postcard and a prayer. They are running persistent, multi-channel outreach over 90 to 180 days: native document signing so claimants can execute on their phone in under two minutes, SMS and email sequences that adapt to engagement signals, and AI-driven inquiry handling that resolves the "what do I need to do next?" question without waiting for a paralegal to call back.
This is where I am biased, because this is exactly what we built at GroupSettle. Our stack (native document signing, SMS, email, branded caller ID, AI voice, ID verification, dashboard, payment rails) exists because each of those used to be a separate vendor invoice, and every additional vendor invoice creates a reason for your admin to send fewer touches. When your admin's margin shrinks with every outreach attempt, they are economically incentivized to stop trying. When the stack is owned and the pricing is flat ($11.99 per signed claimant against the $20 to $25 legacy range), the incentive flips. More touches cost us almost nothing. So we send them.
Our AI super agent handles over 80% of claimant inquiries successfully on its own. That is not a marketing number. That is the difference between a claimant who ghosts at day 14 and one who signs at day 45.
Modeling the Matter That Actually Pencils
If you are evaluating a new mass arb opportunity in the second half of 2026, here is the exercise I would run before committing acquisition spend:
- Estimate your eligible population realistically. Not the number of people who downloaded the app. The number who have a colorable claim, an arbitration clause that holds up, and contact information you can actually reach.
- Model your acquisition funnel at three tiers: lead, signed intake, and filed claimant. Apply realistic drop-off at each stage. If you have never run a mass arb matter before, assume 60-70% of signed intakes convert to filed claimants.
- Model your completion funnel separately. What percentage of filed claimants will complete ID verification? What percentage will respond to outreach during the completion window? What percentage will sign the release? If your admin does not give you historical benchmarks on these numbers, that tells you something.
- Calculate your cost per completed claimant, not your CPA. Then compare that to the expected per-claimant recovery.
- Check whether you can hit the release threshold at your projected completion rate. If the math requires 90% completion and your admin has never delivered above 75%, the gap is not going to close itself.
This is arithmetic, not strategy. But it is arithmetic most firms skip, and the ones who do it consistently are the ones building durable mass arb practices instead of chasing one-off campaigns.
The Market Is Getting Better. Your Model Should Too.
The AAA data tells a clear story: mass arbitration is maturing. The total number of matters is holding. The per-case filing counts are tightening. Defendants are building procedural complexity into their clauses. And the providers (AAA, JAMS, NAM) are all adapting their rules and fee structures to reflect a world where mass arb is a permanent feature, not a temporary exploit.
That permanence is good for plaintiff firms who treat mass arb as a practice area, not a hustle. It rewards infrastructure. It rewards completion discipline. It rewards knowing your numbers.
The volume era got mass arb on the map. The margin era is where the real money gets made.
This is the kind of per-claimant lifecycle modeling GroupSettle runs with plaintiff firms before a single dollar of acquisition spend goes out the door. If you want to see how the math works on a live matter, reach out to Kasia at (813) 737-7025 or visit massarb.groupsettle.com.
Harry Hedaya is the founder of Send It By Text, the native document signing, SMS, and email platform behind GroupSettle's mass arbitration completion stack. Their AI super agent handles over 80% of claimant inquiries on its own, which lifts engagement rates further. He works with plaintiff firms running live mass arb campaigns.
This is the kind of per-claimant lifecycle modeling GroupSettle runs with plaintiff firms before a single dollar of acquisition spend goes out the door. Reach out to Kasia at (813) 737-7025 or visit massarb.groupsettle.com.