•    US consulting market grows 8.1 per cent in 2017
•    Federal spending on consultants rises four times faster under Trump administration
•    Consulting arms of accounting firms—mainly Big Four—were well placed to benefit from tax changes

The 2017 tax overhaul, the first big win of the Trump policy agenda, helped boost revenues for US consulting firms as the market grew faster than the previous year—up 8.1 per cent in 2017.