Growth in online spending during September was only 14.8 per cent - compared to 73.2 per cent year on year growth in September 2007.
September was the third consecutive month where growth rates failed to surpass 20 per cent, despite consumers spending £4.8 billion.
Yet UK shoppers spent 23.6 per cent more on clothing in September compared to the previous month, and seven percent more on gifts and alcohol.
Capgemini UK head of consulting for retail Mike Petevinos said that the internet continues to influence consuumer's shopping habits as they search for the best possible deal.
"The internet not only provides retailers with the ability to communicate more targeted offers to consumers," he said. "This will be critical for retailers in the run up to Christmas to get their message across as the gap between winners and losers looks set to widen."
A seperate study from Hitwise has revealed that internet searches for second hand goods has increased as consumers look for bargains from websites such as eBay.