Overall 2018 saw revenue split remain largely similar to 2017 – which were in turn similar to 2016.

Looking at the table for all participants, audit and accounting maintained a 40% share of revenues, while advisory went up 1% - at the expense of tax. On its own, audit’s market share actually fell slightly, however an increase in accounting work meant audit and accounting combined remained 40% of total revenue.

There was even less change among the Big Four, where percentages remained exactly the same at 35%, 23%, 40% and 2% in 2018. Looking at these figures in slightly more detail, though, reveals that advisory continued to increase as a portion of Big Four revenue. In 2017, it made up 39.6%. In 2018 it had increased to 40.4%. 2018 was the year advisory overtook audit at KPMG, and in 2019 it would not be a surprise to see it increase to 41% or 42% of Big Four revenue, at the expense of audit and tax, which fell by 0.8% and 0.2% respectively in 2018.