Nader Karayanni
TL;DR: Insurance defense firms have historically operated under tighter pricing constraints than many other litigation practices, with relatively narrow spreads between partner and associate billing rates. That puts more weight on leverage, utilization, realization, and cost control. Historical consultant guidance emphasized disciplined staffing, high utilization, and lean overhead. Today, purpose-built AI such as newcase.ai can automate or accelerate document-heavy work such as medical chronologies and deposition summaries, allowing firms to increase capacity without adding headcount at the same rate.
Key Takeaways
Law firm profitability is driven by four core variables: margin, effective rate, utilization, and leverage.
Insurance defense has historically offered less pricing freedom than many other practices, increasing the importance of staffing, utilization, realization, and overhead.
Historical consultant targets for insurance defense included roughly 3 to 4 associates per equity partner and 1,800 to 2,200 annual billable hours.
Partnership structure matters because profit per equity partner depends partly on how many equity partners share the firm's net income.
Document-heavy file work, including medical records, chronologies, and deposition review, is increasingly automatable with tools such as newcase.ai's medical chronologies and deposition summaries.
The 2026 CLM Litigation Management Study shows growing pressure on defense firms from invoice review, staffing constraints, and carrier demands for better exposure analysis.
Insurance defense has always been a strange business.
Ed Wesemann of Edge International documented insurers paying defense firms rates sometimes as much as 50% below prevailing hourly fees for non-insurance clients. He also described a business shaped by billing guidelines, cost restrictions, invoice audits, and intense competition among panel firms. Edge International
Yet defense firms have found ways to build profitable practices inside those pricing constraints.
The key is the law firm leverage model, adapted to a market where the client has unusually strong influence over price, staffing, billing, and payment.
What is the law firm leverage model?
The law firm leverage model explains how a firm generates profit by combining partner work with work performed by associates, paralegals, and other professionals whose services can be delivered profitably below partner level.
David Maister's professional-services profitability model frames the economics around four variables:
Margin × Rate × Utilization × Leverage
Margin reflects the profit left after costs. Rate is the firm's effective rate after discounts and realization. Utilization measures how much productive billable work lawyers perform. Leverage describes how much work is performed by professionals below the equity-partner level.
Maister also distinguished between short-term "hygiene" factors such as margin and utilization and longer-term drivers such as rate and leverage. His formulation was memorable: firms that fail to increase either rate or leverage risk "cruising or losing." Solicitors Journal
That framework is particularly useful for understanding insurance defense because the rate lever has historically been constrained.
Why does leverage work differently in insurance defense?
Leverage creates economic value when work can be delegated to lower-cost professionals while remaining profitable at the rates clients pay.
Insurance defense historically compressed those economics.
Law firm consultant John Olmstead described defense firms operating under highly constrained billing rates and reported seeing very few rates above $175 per hour at the time, with the spread between junior associates and senior partners often below 30%. Olmstead & Associates
A narrower rate spread changes the economics of delegation. Raising rates becomes harder, and promoting too many lawyers into the ownership tier can reduce financial leverage.
That leaves firms with several levers they can control more directly: utilization, staffing leverage, expenses, realization, and the speed at which work becomes cash.
In 2019, Olmstead advised an insurance defense firm that low rates made utilization, leverage, and expenses the primary profitability levers. His suggested targets included 1,800 to 2,000 annual billable hours for associates and approximately three or four associates for every equity partner. Illinois State Bar Association
How did high-volume insurance defense firms traditionally make money?
The historical model relied on high case volume, high lawyer utilization, disciplined staffing, and tight overhead.
Olmstead described first-generation insurance defense firms using associate-to-partner ratios of roughly 4:1, with 2,000 to 2,200 annual billable hours common for both associates and partners. He characterized leverage as the primary source of profit margin in that model. Olmstead & Associates
Other expenses were tightly managed. Defense firms could often avoid premium office space because claims professionals rarely needed to visit the firm's offices.
These figures should be treated as historical consultant targets and rules of thumb, rather than current industry-wide averages:
Metric | Historical consultant target | Source |
|---|---|---|
Associate-to-equity-partner leverage | 3 to 4 associates per equity partner | |
Associate billable hours | 1,800 to 2,200 per year | |
Associate revenue benchmark | Roughly 3x salary as a planning heuristic | |
Revenue per lawyer | Around $300,000 | |
Owner profit margin | Roughly 35% to 45% |
The important point is the structure behind the numbers. When rates are constrained, a firm needs enough profitable production beneath each equity owner to support the economics of the practice.
The tension inside the traditional defense model
Defense culture has historically created a tension with that leverage model.
Wesemann observed that insurers strongly resisted what they viewed as duplicate lawyering. Defense firms therefore developed a culture of lean case staffing, with individual trial lawyers taking substantial ownership of files.
At the same time, many firms rewarded lawyers heavily for personal billable production and promoted strong trial lawyers into partnership. Because partner and associate billing rates could be relatively close, the economic penalty for promotion was less visible at the individual file level.
The result could be a low associate-to-partner ratio even though higher leverage would generally improve the firm's economics. Edge International
That tension still matters today: clients want lean staffing, while firms need enough leverage and efficiency to make low-rate work profitable.
Why is insurance defense associated with high volume and thin margins?
Insurance defense firms operate in an environment where carriers exert significant control over rates, billing guidelines, staffing, expenses, and invoice review.
Wesemann described firms accepting discounted rates, restrictions on cost reimbursement, detailed billing requirements, and third-party invoice audits because they depended on a continuing flow of assignments from insurance clients. Edge International
Olmstead similarly described invoice reductions, delayed payments, and the resulting cash-flow pressure on firms already operating at relatively thin margins. Olmstead & Associates
Those pressures remain visible in current data.
The 2026 CLM Litigation Management Study, based on responses from more than 70 senior claims and litigation executives, found that:
76.3% of responding organizations use legal invoice review software.
50.9% use third-party invoice review services.
Carriers reported a median 5% post-appeal reduction on panel-counsel invoices.
Defense firms had estimated their own post-appeal adjustment rate at 9.5% in the 2024 CLM Defense Counsel Study.
Those numbers show why realization matters so much. An hour recorded by a lawyer does not automatically become an hour of collected revenue.
The economics are also visible at the large-firm level. In the 2025 Am Law 100, Wachtell reported the group's highest profit margin at 78%, while Wilson Elser, a large national firm with a substantial insurance-defense practice, was at 14%.
The comparison should be treated carefully because the firms have very different practices, clients, rates, and business models. It still illustrates how dramatically law firm margins can differ.
How does partnership structure affect profit per equity partner?
Profit per equity partner, commonly abbreviated PEP or PPEP, is calculated by dividing net operating income by the number of equity partners.
That denominator matters.
A firm can have hundreds of lawyers with the partner title while maintaining a relatively small group of equity owners who share the firm's residual profits.
Gordon Rees illustrates the structure. According to the 2025 Am Law 100 data summarized by Legal.io, 90.6% of its partners were nonequity partners, the highest percentage among the Am Law 100 that year. Legal.io
The broader market has been moving in the same direction. In the 2026 Am Law 100, covering 2025 financial performance, nonequity partner ranks increased by almost 7%, while equity-partner ranks grew by roughly 2%. That increased leverage across the group. Original Jurisdiction
PEP therefore reflects both operating performance and partnership structure.
A larger nonequity tier does not automatically make a firm more profitable. It does change how the firm's economics are distributed and can increase leverage when lawyers outside the equity tier generate profitable work.
How do profitable insurance defense firms engineer the file workflow?
One of the clearest historical playbooks comes from Wesemann's 2008 analysis of specialized insurance defense firms.
He described firms building their operations around cost-effective service to carriers through:
specialization by defense practice,
disciplined supervision,
written practice protocols,
paralegal-driven file workup with limited attorney involvement,
fewer people touching each file,
centralized control over fee agreements,
billing processes designed around the client's requirements,
fixed fees or blended rates where practical,
proactive reporting on cost per case and outcomes, and
partner incentives tied to profitability.
That playbook is unusually relevant in 2026 because a growing portion of the file-workup layer can now be automated.
Medical-record review, chronology construction, deposition summarization, fact extraction, and cross-referencing are all document-intensive tasks. Historically, they required substantial attorney, paralegal, or legal-nurse time.
Purpose-built litigation AI changes the amount of human capacity those tasks require.
For example, newcase.ai medical chronologies read the record set and build a date-ordered chronology in which extracted facts link back to the underlying source. newcase.ai deposition summaries generate page-line summaries, key admissions, and source links to the original testimony.
The operational goal is straightforward: reduce the amount of lawyer time required to organize and retrieve facts while preserving attorney judgment for exposure analysis, case strategy, negotiation, depositions, and trial preparation.
How does realization affect insurance defense profitability?
Realization measures the percentage of billable work that actually gets invoiced. Collection measures the percentage of invoiced work that gets paid.
According to Clio's 2025 Legal Trends benchmarks, the average U.S. law firm had:
38% utilization
88% realization
93% collection
The math shows how quickly recorded value can shrink.
If a firm records $100 of billable value and realizes 88% of it, $88 reaches an invoice. If it then collects 93% of that $88, approximately $81.84 becomes collected revenue.
That is before considering whether the work itself was profitable to perform.
Insurance defense adds another layer because carrier billing guidelines and invoice-review systems can scrutinize staffing, task descriptions, time increments, duplication, and whether particular activities comply with agreed guidelines.
The 2026 CLM study found that more than three-quarters of responding carriers use invoice-review software. That makes clean workflows, accurate time entry, and compliance with client guidelines economically important.
What is a good profit margin for an insurance defense law firm?
There is no universal profit margin that applies to every insurance defense firm.
Practice mix, geography, billing rates, salaries, office costs, realization, staffing, case complexity, and partnership structure can all materially change the answer.
As a historical benchmark, John Olmstead advised a small liability-defense firm in 2017 that owner earnings should be approximately 35% to 45% of revenue, while revenue per lawyer should be around $300,000 and annual billable hours should reach roughly 2,000 or more. Illinois State Bar Association
Those numbers are better viewed as consultant targets than industry averages.
For a modern defense firm, the more useful exercise is to measure profitability at the matter and client level:
Collected revenue per file - direct labor cost - allocated overhead = file-level contribution
From there, firms can compare profitability across carriers, matter types, staffing models, offices, and partners.
That is particularly important when two clients pay similar hourly rates but create very different economics because of billing rules, write-downs, cycle times, staffing restrictions, and reporting requirements.
How does the 80/20 rule apply to an insurance defense practice?
The Pareto principle is a useful management heuristic: a relatively small share of inputs often drives a disproportionate share of outcomes. The exact split does not need to be 80/20 for the framework to be useful.
In insurance defense, the principle can help firms think about files, tasks, and clients.
Files
Exposure is uneven across a portfolio, which makes early and accurate case evaluation especially important.
The 2026 CLM study found that inaccurate exposure analysis had moved from sixth to first among carriers' recurring friction points with defense counsel. 2026 CLM Litigation Management Study
The same study reported that 96.8% of non-dismissed litigated cases are resolved through negotiated settlement rather than verdict.
That puts enormous value on understanding exposure early enough to influence strategy and settlement.
Tasks
Records review, chronology building, deposition review, discovery, and fact organization can consume substantial capacity.
Evaluation, negotiation, case strategy, witness preparation, and trial preparation depend more heavily on attorney judgment.
The operational opportunity is to automate repeatable document work and preserve lawyer capacity for those higher-judgment activities.
The stakes extend beyond defense spend. According to the 2026 CLM study, legal fees and expenses represented a median 25% of total litigated case costs, with indemnity accounting for the remaining 75%.
That means litigation management cannot be evaluated only through legal spend. Better exposure analysis and strategy can matter because indemnity represents the larger share of total case cost.
Clients
Client concentration matters too.
Wesemann observed that insurance defense partners historically worried about depending heavily on assignments from a small number of carriers. Losing one major relationship could materially change the economics of a firm. Edge International
For a defense firm, the useful application of the 80/20 principle is to identify which files, activities, and client relationships disproportionately influence profitability and outcomes, then allocate human judgment accordingly.
Classic volume model vs. AI-enabled efficiency model
The traditional defense model and the emerging efficiency model optimize many of the same economic variables differently.
Lever | Classic volume model | AI-enabled efficiency model |
|---|---|---|
Rate | Accept panel rates and contest reductions through the billing process | Use historical matter data to support fixed, blended, or phase-based pricing where appropriate |
Leverage | Associate-heavy staffing pyramid | Use technology to increase the amount of work each professional can supervise |
File workup | Associates and paralegals review and organize documents manually | AI accelerates records review, chronologies, transcript summaries, and fact extraction |
Utilization | Higher billable-hour targets | Shift lawyer capacity toward exposure analysis, strategy, negotiation, depositions, and trial preparation |
Realization | Manage guideline compliance and respond to invoice reductions | Standardize workflows and work product around client requirements |
Overhead | Control office and staffing costs | Reduce manual touches required per file |
Client reporting | Status reports and periodic case updates | Add cost-per-case, cycle-time, exposure, and outcome data |
Partner incentives | Heavy emphasis on personal billable production | Greater emphasis on profitable delivery, client outcomes, and efficient supervision |
The economics become especially interesting when a firm moves beyond pure hourly billing.
Under an hourly model, reducing hours can reduce revenue unless the firm gains additional work or changes pricing. Under a fixed-fee or outcome-linked structure, reducing the cost of producing the same or better work can directly improve matter profitability.
What is changing for the insurance defense leverage model in 2026?
Three pressures are converging: billing-model dissatisfaction, capacity constraints, and AI-driven efficiency expectations.
Carriers are questioning hourly billing
The 2026 CLM Litigation Management Study asked senior claims and litigation executives how well hourly billing aligns law firm behavior with carrier interests.
The result was 52 out of 100.
Approximately 30% of executives said they were open to outcome, win, or success-based fee structures, while another 39% said they were conditionally open depending on the details.
Yet 89.8% said firms very rarely propose alternative billing structures. 2026 CLM Litigation Management Study
That creates an opening for firms with enough data to understand their own cost per file and price work with confidence.
Defense capacity is constrained
The same study found that 38.7% of carriers had at least one panel firm ask for a pause or halt on new assignments during the previous six months because of staffing constraints.
A separate October 2025 survey by CLM's Litigation Management Task Force found that 60% of surveyed law firms were turning down work because of capacity constraints.
For a high-volume defense firm, additional capacity can therefore translate directly into the ability to accept more assignments.
Clients expect AI savings to affect economics
Pressure extends beyond insurance carriers.
Deloitte research reported by Legal Futures found that 78% of surveyed legal-department leaders considered cost reduction the most important benefit they expected from outside counsel's use of AI.
Some general counsel were targeting 20% to 40% reductions in legal-department costs over the following two to three years, with some of that pressure being passed on to outside counsel. Legal Futures
The same research anticipated a shift away from the traditional associate-heavy pyramid toward a leaner, more diamond-shaped organization with fewer junior roles and a broader middle layer of lawyers with legal and technical expertise.
That changes the meaning of leverage.
Historically, leverage meant adding more associates beneath each partner.
Increasingly, leverage can also mean increasing the amount of casework each lawyer can supervise by automating the document-heavy work underneath legal judgment.
What happens when AI reduces billable work?
This is the central economic question for defense firms.
If an AI system reduces the hours required to review records, summarize testimony, or organize a file, an hourly firm may initially see fewer billable hours on that matter.
The economic benefit depends on what happens to the capacity that was freed.
If the firm leaves that capacity unused, efficiency can reduce revenue.
If the firm uses the capacity to accept additional files, reduce staffing pressure, shorten cycle times, improve service, or move toward pricing structures where revenue is less tightly connected to hours, the economics look very different.
That is why AI adoption in insurance defense is ultimately a business-model question as much as a technology question.
We cover the math in more detail in The 25% Ask: How AI Is Rewriting Defense Firm Economics.
FAQ
What is a good leverage ratio for an insurance defense firm?
Historical consultant guidance recommended approximately three to four associates per equity partner for insurance defense firms operating under low billing rates. Actual ratios vary substantially by practice type, case complexity, staffing model, client guidelines, and technology. As more file-workup tasks become automated, headcount ratios alone become a less complete measure of leverage.
What is the difference between profit per partner and profit per equity partner?
Profit per equity partner, usually called PEP or PPEP, divides a firm's net operating income by its number of equity partners.
The phrase profit per partner is used less consistently, so comparisons should identify which partner population is included.
A large nonequity tier can increase financial leverage because lawyers outside the equity tier can generate profit without increasing the number of equity owners sharing residual income. PEP still depends on the firm's actual profitability, not simply the size of its equity tier.
What is realization in a law firm?
Realization measures the percentage of billable work that ultimately gets invoiced to clients.
For example, if a firm records $100,000 of billable work and invoices $88,000 after write-downs or other adjustments, its realization rate is 88%.
Collection is separate. It measures how much of the amount invoiced actually gets paid.
What is the difference between utilization, realization, and collection?
Utilization measures how much working time becomes billable work.
Realization measures how much billable work becomes invoiced revenue.
Collection measures how much invoiced revenue is ultimately paid.
Clio's 2025 U.S. benchmarks were 38% utilization, 88% realization, and 93% collection. Clio
Why are insurance defense hourly rates often lower than other litigation rates?
Carriers provide panel firms with recurring case volume and have historically used that purchasing power to negotiate discounted rates and detailed billing terms.
Wesemann documented insurance defense rates that could be as much as 50% below prevailing hourly rates for non-insurance clients. Olmstead separately described constrained defense rates and relatively narrow spreads between junior associates and senior partners.
The result is a business model where staffing, utilization, realization, overhead, and case volume have an unusually large impact on profitability.
What is the rule of three for law firm associates?
The rule of three is a traditional law-firm planning heuristic under which an associate generates roughly three times their salary in collected fees.
The theory is that one portion supports salary, another supports overhead and benefits, and the remaining portion contributes to firm profit.
It should be treated as a rule of thumb rather than a universal benchmark because salaries, benefits, billing rates, realization, office costs, support staffing, and practice economics vary substantially among firms.
What makes an insurance defense firm profitable?
Historical management guidance consistently emphasized disciplined staffing, high utilization, controlled overhead, specialization, standardized workflows, client-specific billing processes, and careful partnership structure.
Modern defense firms have an additional lever: reducing the human time required for repeatable file work.
Medical records, chronologies, deposition summaries, and other document-heavy workflows can increasingly be automated or accelerated, allowing lawyers to concentrate on exposure analysis, strategy, negotiation, depositions, and trial preparation.
How can AI improve insurance defense law firm profitability?
AI can increase capacity by reducing the amount of attorney and staff time required for repeatable document work.
The financial impact depends on how the firm uses that capacity. A firm may accept more matters, reduce backlogs, move work faster, improve consistency, or support alternative pricing models.
For litigation teams, the strongest use cases are typically workflows where large amounts of information must be reviewed and every conclusion needs to remain traceable to its original source.
That includes medical chronologies, deposition summaries, and cross-referenced case intelligence.
The bottom line
Traditional law-firm leverage is easiest to monetize when firms have room to raise rates. Insurance defense has historically offered much less pricing freedom.
Defense firms adapted through structure and process: disciplined leverage, high utilization, controlled overhead, lean equity ownership, standardized workflows, and close attention to cost per file.
Those fundamentals still matter.
What has changed is the work underneath them.
A meaningful share of document-heavy file work can now be automated or accelerated. That gives insurance defense firms another form of leverage: more case capacity per lawyer without requiring headcount to grow at the same rate.
For firms facing staffing shortages, billing pressure, and increasing client expectations, that may become one of the most important operating advantages available.
You can see how newcase.ai turns records, testimony, and case files into source-cited litigation intelligence.
Sources
Ed Wesemann, Strategic Options for Insurance Defense Law Firms, Edge International, 2008.
John W. Olmstead, Trapped in an Insurance Defense Practice? Two Strategic Approaches, Olmstead & Associates.
John W. Olmstead, Best Practice Tips: Improving Productivity and Profitability in an Insurance Defense Law Firm, Illinois State Bar Association, 2019.
John W. Olmstead, Best Practice: How Many Hours Should Associates Be Billing?, Illinois State Bar Association, 2016.
John W. Olmstead, Characteristics of a Successful Liability Defense Law Firm, Illinois State Bar Association, 2017.
Simon Nash, People and Profits: How HR Programmes Can Increase Firm Profits, Solicitors Journal, 2012.
The 2025 Am Law 100: By the Numbers, Legal.io, 2025.
David Lat, The Top 20 Most Profitable Law Firms (2025), Original Jurisdiction, 2026.
2026 CLM Litigation Management Study, Suite 200 Solutions for the Claims and Litigation Management Alliance, March 2026.
Law Firm Key Performance Indicators and Benchmarks, Clio, 2025.
General Counsel See Lower Bills as Main Benefit of AI, Legal Futures, July 2026.
