This represents a 14.1% rise compared to December 2020 the highest monthly figure in recorded history.
Overall, the industry within the UK posted £31.1bn in revenues, marginally up by 0.4% on 2019, the previous record year.
Turnover for accounting in January 2021 was up 3.7%, while the financial services overall saw a significant drop of 15.8% over the same period.
Julie Matheson, regulatory partner for Accounting Services at Kingsley Napley LLP, said: “The early weeks of 2021 have been outstanding for the Accounting industry, after a remarkably resilient performance in 2020.
“Numerous firms are now considering growth in the dual context of impending audit reform and a post-lockdown reopening of the economy.”
She added: “In these uncertain times, Accounting firm leaders need to carefully analyse their plans in light of increased activity by regulators and with reference to staff morale and mental health, after a year of remote working.”