Legal 500 Research Methodology
The Legal 500 research methodology sets out how law firms, chambers and individual lawyers are assessed and ranked across global jurisdictions, practice areas and legal markets. As a global authority on legal market intelligence, Legal 500 provides independent, evidence-led rankings grounded in submissions, detailed market analysis, and feedback from clients, peers and other market participants. Each assessment is made in context, taking account of the relevant jurisdiction, practice area, competitive landscape and wider legal market conditions. Client validation and commentary complete the picture, add essential market context, and help assess excellence in practice.
How Legal 500 rankings work
Legal 500 rankings are comparative assessments of firms, chambers and individual lawyers within defined jurisdictions and practice areas. Research teams consider the strength, consistency and relevance of the evidence available in each market, assessing performance in context rather than applying a single universal formula. Ranking outcomes reflect how a firm, chamber or practitioner is positioned against others active in the same legal market.
Evidence used in Legal 500 rankings
Our rankings are informed by a range of research inputs, including:
- Submissions
- Comparative legal market analysis
- Track record and recent work
- Interviews with lawyers and market participants
- Peer feedback from competitors
- Client feedback and referee validation
Not all evidence sources are available for every firm or practice area in every research cycle. Rankings are based on the totality of evidence available to the research team.
Key Legal 500 ranking criteria
Research teams assess firms, chambers, and individual practitioners against a range of qualitative and comparative factors, which may include:
- Subject matter and practice area expertise
- Complexity and quality of work
- Strength and depth of team
- Depth and breadth of practice area coverage
- Industry sector expertise
- Strength of client base and long-term client relationships
- Market visibility, brand strength and reputation
- Comparative market positioning
- Ancillary and cross-practice capabilities
- International or cross-border expertise
- Innovation, legal technology, and service delivery capabilities
Research is conducted within the context of broader market conditions and developments, including commercial, legislative, economic, and recruitment trends where relevant.
The relevance and weighting of particular evidence sources and assessment criteria may vary according to the ranking product and market being researched.
Interviews in the Legal 500 research process
Interviews form an important part of the research process for many rankings and may provide additional context regarding market positioning, strategic direction, and recent developments.
As part of our comprehensive research process, interviews are conducted with a representative selection of firms, chambers and practitioners each cycle. The absence of an interview does not negatively affect assessment.
Certain rankings products may place greater emphasis on interviews or apply modified assessment criteria depending on the nature of the market being researched.
How ranking decisions are made
Legal 500 rankings are based on a holistic assessment of all available evidence. There is no single factor that determines ranking position; instead, decisions reflect relative performance compared to other firms and practitioners in the same market.
Firms, chambers, and individual practitioners may be retained, promoted, downgraded, newly ranked, or removed based on changes in market activity, comparative positioning, and available supporting evidence over time.
Firms and lawyers may enter the rankings where available evidence demonstrates credible and sustained participation within the relevant market or practice area.
How often Legal 500 rankings are updated
While Legal 500 rankings are reviewed annually through an ongoing programme of research and market engagement, editorial content may be updated on a more rolling basis via Legal 500 Live, and we may also make in-year updates where appropriate to reflect significant firm developments or team changes.
Our methodology is intended to ensure that rankings remain credible, consistent, and reflective of the evolving legal market.
To understand how your firm can take part in the Legal 500 research process, including submitting work and providing referees, explore our submissions guidance