Consulting had a year of huge change in 2025. Here's how the Big Four firms performed this year.

Core Insights - The Big Four accounting firms (Deloitte, EY, KPMG, and PwC) are experiencing modest revenue growth after a pandemic-era boom, with Deloitte reporting a 4.8% annual revenue growth in its latest financial year [1][6]. Group 1: Financial Performance - Deloitte's global revenue reached $70.5 billion, with a year-over-year growth of 4.8%, recovering from a previous drop to 3.1% [5][6]. - PwC is the only firm among the Big Four to report a slowdown in growth for three consecutive years, with a reduction in global headcount by 5,600, resulting in a total of 364,000 employees [8]. Group 2: Workforce Changes - Deloitte expanded its workforce by 10,000, bringing its total to 470,000 employees, marking a 2% increase [5]. - In contrast, PwC's workforce reduction reverses its previous goal to grow to around 400,000 employees [8]. Group 3: Industry Trends - The professional services industry is undergoing significant transformation due to AI, impacting the types of services offered and the talent required [3]. - The largest firms are investing billions to effectively implement AI in their operations and assist clients in navigating this transition [3].