Legal advertising spending hit more than $2.5 billion across 26.9 million ads in 2024, up over 32% from 2020, according to the American Tort Reform Association's 2025 legal advertising report. That kind of spending volume makes the pricing model you choose matter more than ever.
Two structures dominate mass tort vendor agreements. Cost plus separates campaign expenses from a management fee or markup. Cost per case charges a predetermined amount for each defined milestone a claimant reaches. The right choice affects your budget predictability, cash-flow exposure, lead quality, intake accountability, and how responsibly you can scale.
Key Takeaways
- Cost plus shows media and operating costs clearly, but your firm absorbs more risk when spend rises or conversions slip.
- Cost per case simplifies budgeting and shifts acquisition risk to the vendor, but per-case pricing usually runs higher.
- Compare both models using cost per qualified claimant, signed-retainer cost, and total acquisition cost — not the advertised rate.
- Review fee triggers, lead ownership, quality standards, and refund terms before signing anything.
Cost Plus vs Cost Per Case: Quick Comparison
Here's how the two structures compare across the factors that matter most for mass tort campaigns:
| Dimension | Cost Plus | Cost Per Case |
|---|---|---|
| Pricing structure | Firm pays approved expenses (media, intake, tech) plus a management fee or markup | Firm pays a flat fee once a claimant hits a defined milestone |
| Budget predictability | Spend fluctuates with ad auctions, tort competition, and intake activity | Spend is forecastable by expected case volume, though variance still occurs |
| Risk allocation | Firm carries more risk if spend rises or conversion drops | Vendor absorbs more conversion risk, priced into a higher unit rate |
| Measurement | Requires itemized reporting across media, fees, intake, and tech | Requires documented acceptance criteria and attribution rules |
| Best initial fit | Firms with strong intake and financial controls | Firms wanting predictable economics with lighter intake infrastructure |
Two details the table can't capture on its own:
- A cost-plus agreement must specify exactly which expenses are pass-through costs and which ones live inside the management fee. Vague language here is where disputes start.
- A cost-per-case fee should never be described, in writing or in practice, as a percentage of legal fees or settlement recovery. That framing triggers ethics review in nearly every state.
We'll cover why in the next section.
What Are Cost Plus and Cost Per Case?
Cost Plus
Under a cost-plus arrangement, your firm reimburses specified campaign expenses and pays an additional management fee, markup, or fixed service charge on top. The agreement typically covers several cost categories:
- Media buying (paid search, social, TV, connected TV)
- Creative production and landing pages
- Intake labor and call handling
- Claimant screening
- CRM or call-tracking technology
- Compliance tools and campaign management
The appeal is visibility. You see exactly where dollars go, you can shift channels mid-campaign, and you keep direct control over volume and targeting.
The downside is that monthly spend fluctuates, sometimes sharply, with ad auction pricing, tort competition, and intake performance. You still pay for leads and media that don't convert. Expense disputes also crop up when the contract fails to define "allowable costs" with precision.
"Cost plus 20%" means approved costs plus an additional 20% charge. That phrase means little until the contract states whether the 20% applies to media spend only, all pass-through expenses, or another defined base. Get the base in writing before you sign.
Cost plus tends to suit firms with experienced marketing and intake teams who want to test multiple channels and retain granular control. Mass tort paid cost per lead typically runs $1,500 to $3,000, and cost per click often lands between $200 and $500+. Firms need the internal bandwidth to monitor that spend closely, because nobody else will.
Cost Per Case
Cost per case is a flat fee triggered when a claimant meets a specific contractual milestone: passing eligibility screening, completing a qualified intake, or signing a retainer. That milestone definition is everything. "Case" can mean a raw claimant, a qualified claimant, an accepted file, or an executed retainer, and each version produces a different economic outcome for your firm.
The benefits are straightforward:
- Easier forecasting since you know your per-unit cost
- Less exposure to wasted media spend
- Vendor compensation aligned directly with production
The risks match the simplicity:
- Higher per-unit pricing
- Limited visibility into the vendor's underlying media costs
- Disputes over rejected or duplicate cases
- Pressure on the vendor to chase volume over quality
Ethics rules draw a hard line here. A flat cost-per-case marketing fee is different from a percentage of attorney fees or settlement proceeds, and that distinction is not optional.
ABA Model Rule 5.4 generally prohibits a lawyer from sharing legal fees with a nonlawyer. Florida Bar Opinion 18-1 describes a fee based on a case's perceived value or outcome as improper, while allowing a reasonable, prearranged fixed charge per matter referred. Verify fee-splitting and professional-conduct rules in every jurisdiction where you operate before you structure a per-case deal.
Cost per case often fits firms with limited internal intake capacity, firms entering a new tort without established infrastructure, or firms that would rather pay for an agreed deliverable than manage variable marketing inputs directly.
Cost Plus vs Cost Per Case: What Is Better for a Mass Tort Campaign?
Neither model wins outright. The right structure depends on your cash position, intake capability, tolerance for variable spend, and how mature your campaign already is.
Run a break-even comparison using these variables:
- Total acquisition cost under each model
- Expected signed-case volume
- Expected case value, net of referral or co-counsel splits
- Internal handling and financing costs
- Expected attrition between intake and filing
Cost plus tends to work better when you:
- Can audit expenses quickly
- Already run a capable intake operation
- Want control over channel testing and reallocation
Cost per case tends to work better when you:
- Need predictable budgeting
- Lack internal media infrastructure
- Prefer the vendor absorb risk until the defined case milestone
Before signing with any vendor, run through this checklist:
- Exact definition of a "case" and qualification criteria
- Duplicate and shared-lead policies
- Exclusivity and geographic eligibility terms
- Statute-of-limitations screening procedures
- Consent documentation standards
- Refund and replacement-case rules
- Reporting frequency and audit rights
- Termination terms
Regardless of which model you pick, track the same metrics:
- Cost per lead
- Cost per qualified claimant
- Cost per signed retainer
- Answer rate, qualification rate, and signed-retainer rate
- Time to contact
- Downstream case quality
These numbers tell you more than any vendor's marketing deck.
Most firms get stuck here because nobody owns the reporting infrastructure to pull these numbers cleanly across vendors and channels. LEXGRO's fractional CMO engagements and LexxlyIQ platform address that gap. They pull CRM, call tracking, ad platform, and intake data into one view so firms can see real cost per signed case by channel, not just a vendor's self-reported figure.
Real-World Examples and Evaluation Scenarios
Scenario 1: The established firm. A mass tort practice with a seasoned intake team chooses cost plus to keep control over media and screening. Each month, they compare approved spend against qualified-claimant and signed-retainer output rather than raw lead count. That is the only way to know if the "plus" fee is actually earning its keep.
Scenario 2: The newer practice. A smaller firm entering its first mass tort campaign picks cost per case to limit exposure to wasted media spend. Before signing, they:
- Test the vendor's case definition against real file samples
- Confirm compliance documentation exists for each claimant
- Compare the flat fee against expected net case value, not just the sticker price
Scenario 3: The hybrid approach. A mature firm considers a lower base management fee paired with a defined performance component. This can work, but multiple fee triggers make attribution, ethics compliance, and reconciliation noticeably harder. More triggers mean more places for a dispute to hide.
Esquire Bank's case study on Bernheim Kelley, LLC shows a firm that increased marketing spend 414% over three years while growing its mass tort case inventory 77%, using case-cost financing to fund the expansion.
The study does not disclose which vendor pricing model the firm used or its per-case acquisition cost. It illustrates the capital exposure that comes with scaling acquisition, not which fee structure performed better.
The decision cue is simple: choose the model that makes total economics visible, gives you control over case quality, and still works if the tort runs longer or performs worse than projected.
If you're weighing this decision for an upcoming campaign, LEXGRO can walk through your current measurement setup, vendor contracts, and growth readiness before you commit to scaling spend in either direction.
Conclusion
Neither model wins by default. Cost plus prioritizes control and expense transparency. Cost per case prioritizes predictable unit economics and shifts more risk to the vendor.
The right call depends on your intake operation, financial capacity, campaign maturity, and how rigorously you can verify results through the signed-retainer stage. A firm with strong internal controls might thrive on cost plus. A firm just entering a new tort might need the predictability of cost per case.
Whichever path you choose, lock in the economics before you scale:
- Define every fee trigger in writing
- Model downside scenarios before launch
- Judge vendors on full acquisition cost, not a headline rate that collapses at cost per qualified case
Frequently Asked Questions
What does "cost-plus 20%" mean in a cost-plus contract?
Cost-plus 20% means approved campaign costs plus a 20% fee on top. The agreement must define the cost base and whether the 20% applies to media only, all pass-through costs, or the full defined base.
Are guaranteed maximum price (GMP) and cost-plus contracts the same?
No. Cost plus reimburses defined costs plus a fee, while a GMP caps the total price subject to stated exceptions. Mass tort marketing agreements should expressly state whether any spending cap or approval threshold applies.
Who is responsible for mistakes in a cost-plus contract?
Responsibility depends on the written agreement, the source of the error, and applicable ethics rules. Vendors are typically accountable for inaccurate reporting or unauthorized charges, while the firm remains responsible for approving budgets and providing accurate intake criteria.
