Explore how mid-size law firms are using CoCounsel Legal to increase matter capacity, reduce write-downs, improve attorney retention, and turn AI into measurable revenue growth.
Highlights
- Mid-size law firms are leveraging CoCounsel Legal to increase matter capacity and reduce non-billable write-downs.
- AI-driven efficiency improves partner utilization, talent retention, and delivers measurable financial and client value outcomes.
- Forrester’s study quantifies how CoCounsel Legal drives revenue growth, margin recovery, and competitive advantage for mid-size firms.
Mid-size law firms operate in a pressure zone that doesn’t get enough attention. Too large to run lean on instinct alone, too constrained to absorb headcount as the default answer to growth, they face the same competitive expectations as the Am Law 200 while carrying the margin discipline of a firm that can’t afford to get it wrong.
Thomson Reuters commissioned Forrester Consulting to quantify the return firms realize from CoCounsel Legal. The Total Economic Impact™ of Thomson Reuters CoCounsel Legal Cost Savings and Business Benefits Enabled By CoCounsel Legal contains the full financial model and its findings for mid-size firms, which reflect a story about revenue growth, margin recovery, and the kind of talent outcomes that protect the firm’s future.
There is a specific kind of revenue loss that compounds silently at firms of this size: write-downs accumulating across associates, capacity capped by how long manual tasks take, and headcount growing just to keep pace with demand.
The 2026 Forrester study on CoCounsel Legal captures exactly how mid-size firms are changing that equation.
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How do mid-size firms unlock 50% more matter capacity without adding headcount?
Partner time is the most expensive asset in the firm
The talent dimension: retention is revenue protection
The client story that closes the loop
How do mid-size firms unlock 50% more matter capacity without adding headcount?
According to a Forrester survey, mid-size firms experienced significant operational improvements after implementing the solution:
- 50% increase in matter capacity – average matters handled per month grew from 19 to 29, with no additional headcount
- 82% of respondents reported measurable time savings across their organization
- 75% of respondents reported a reduction in non-billable write-downs
The 82% who reported time savings and the 75% who reported fewer write-downs are not separate data points; they reflect the same underlying problem. Write-downs at mid-size firms are not simply a billing issue – they are a capacity and utilization issue.
Every hour written off represents attorney time that was spent but never recovered. CoCounsel Legal addresses that at the source, reducing the time attorneys spend on core legal tasks so that more of what they do translates directly into bills clients pay and firms keep.
The platform’s impact on drafting and research workflows is central to why both numbers move in the right direction:
- Research workflows that previously required hours of manual synthesis can now be completed in a fraction of the time
- Drafting workflows produce higher-quality work product from the start, reducing the partner rework that quietly erodes realization rates
When both inputs improve simultaneously, the downstream math changes across every matter the firm handles, not as a one-time gain, but as a structural shift in how attorney time converts to recovered revenue.
Partner time is the most expensive asset in the firm
One finding from the Forrester survey deserves specific attention for mid-size firm leaders: firms using CoCounsel Legal saw partner research review time decrease by an average of 25.5%.
That number matters because of what partner time represents at a mid-size firm. It is simultaneously the most expensive and most constrained resource on the roster. When partners spend significant portions of their day reviewing inconsistent first drafts or substantially editing research outputs, the cost is not simply an inefficiency on a single matter; it is a structural ceiling on the firm’s capacity:
- Fewer matters partners can actively supervise at any one time
- Fewer clients the firm can reliably serve at the level partners need to serve them
- Less revenue the firm can consistently produce, regardless of associate headcount
CoCounsel Legal raises the quality floor on first-draft work. The gap between an associate’s output and a partner-ready work product narrows, and that compression is where the 25.5% comes from. The full financial model – including year-by-year projections and the methodology Forrester applied – is available in the complete study.
For large legal departments, this dynamic is already familiar. AI-enabled consistency in work product quality has reshaped how supervision time gets allocated. The difference for mid-size firms is one of proportion: with smaller partner pools and tighter leverage ratios, every hour recovered from review and revision has an outsized effect on what the firm can produce.
The talent dimension: retention is revenue protection
Mid-size firms compete for talent against firms with stronger brand recognition and, often, higher associate pay scales. The Forrester survey surfaces something that changes the talent calculus.
63% of mid-size firm respondents agreed that CoCounsel Legal improved attorney work-life balance, and 82% reported meaningful time savings – directly reducing the late-night document reviews and manual preparation tasks that drive associate burnout at firms of this size. When CoCounsel Legal absorbs the lowest-value, highest-volume work that falls to junior attorneys, what remains is more of the work that makes legal practice worth doing.
Talent retained is revenue protected. At a mid-size firm, losing a third-year associate carries a compounding cost:
- Client relationships that associate managed are immediately at risk
- Institutional knowledge leaves with them and cannot be quickly replaced
- Recruiting and onboarding a replacement takes months before full productivity is restored
The retention benefit in the Forrester study is not a soft metric. It is a risk-adjusted financial outcome.
The client story that closes the loop
The competitive benefit of CoCounsel Legal extends beyond what happens inside the firm. 75% of mid-size firm respondents said CoCounsel Legal improved client value and marketability, the strongest client outcome of any firm size segment in the Forrester survey.
That finding reflects something mid-size firms know intuitively: clients at this level are asking about AI. They want to know whether their firm is using tools that will make their matters move faster, their bills more defensible, and their outcomes more consistent.
Being able to answer that question with a credible, governed platform – one that sits on a foundation of trusted legal content and answers the content quality question directly – is a client conversation asset.
Ready to explore more? Dive into The Total Economic Impact™ of Thomson Reuters CoCounsel Legal Cost Savings and Business Benefits Enabled By CoCounsel Legal to see the complete ROI model, year-by-year projections, and what mid-size firms can realistically expect from AI adoption. ↓
Case study
A Forrester Consulting study of real law firms using generative AI in legal practice today.
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