Account wins, existing accounts coming to fruition and retention of key accounts were cited as some of the reasons for growth.
Banks Sadler chief executive Leigh Jagger said: "I’m delighted we have delivered these results while also making significant service upgrades in both our new technology offering and the opening of our New York office."
However, she added: "Over the last 12 months some of our contracted clients have become even more focussed on reducing external meeting spend. We have already seen this result in a substantial reduction in UK spend in 2013 and this certainly looks set to be a trend that may continue. We are anticipating tough trading conditions for some time to come."The news comes after Banks Sadler acquired Medical Projects International (MPI), the Windsor-based event and communications agency, for an undisclosed sum, earlier this month.