Our approach takes an industry-wide and 360-degree approach to evaluating firms. We gather insights from clients, from consultants, conduct our own assessments, and draw on credible information in the public and private domain.
The ranking is based on two pillars: a survey of clients and consultants, and a capabilities assessment. Both factors have a weighting of 50%.
The views of clients and consultants are captured through Consultancy.org’s survey tool, which is open all year round.
Per May 2026: The global survey database spans 5,000 client reviews and 20,000 consultant peer reviews by capability/sector across around 80 areas of service.
The capabilities assessment is based on an evaluation of five factors: firm capabilities, industry awards, prestige, thought leadership, and popularity on Consultancy.org. For each factor, data is drawn from Consultancy.org’s database of firm capabilities and vetted external sources.
Firms that score above the threshold for ranking entry are included in the Top Consulting Firms in the UK list, with winners sorted across five levels: Diamond, Platinum, Gold, Silver and Bronze. Within each level, consultancies are sorted based on their average score, although differences within a level can be negligible.
Firms that do not meet the threshold are excluded from the ranking. Across our rankings, over 80% of the advisory firms assessed do not make the ranking.