IAB figures for the first half of the year show online expenditure rising by £82m, giving it a share of 23.5 per cent of the advertising market.
In the first half of 2009 internet advertising grew by 4.6 per cent to £1.75bn, despite the entire advertising sector contracting by 16.6 per cent during the same period.
The UK remains the world leader in terms of market share for online, with the medium accounting for 23.5 per cent in the first half of 2009.
Guy Phillipson, chief executive of the Internet Advertising Bureau, said: “Internet advertising has beaten all expectations to achieve growth in the most challenging market conditions. Online display has performed notably well against its peers in TV, print and radio despite more than £1.5 billion being wiped off the advertising industry. We have a rollercoaster of a year ahead but even in tough economic conditions marketers still recognise the value, accountability and measurability of online advertising.”