Deloitte UK has reported its first revenue fall in 15 years, underlining the pressures facing the professional services sector in a weaker economy. The firm's income slipped 1 per cent to £5.68 billion in the year to 31 May 2025, down from £5.75 billion the previous year.
The slowdown was largely driven by a sharp drop in consulting activity, as clients delayed major projects during a period of economic uncertainty. It is the first contraction for Deloitte UK since 2010, and follows years of consistent growth that positioned the firm as a market leader among the Big Four.
