Shoppers spent a total of £5.2bn online in October, a year-on-year growth of 23% and the highest October growth since before the recession.
Sales so far this year have also beaten 2009 figures, with £46bn being spent online so far in 2010 - a growth of 17% compared to January.
The clothing sector saw the biggest improvement, with a 33% year on year growth in 2010. The gifts sector grew 76% in October compared to September, and the home and garden sector grew 22%.
The figures came from the latest IMRG Capgemini e-Retail Sales Index.
Chris Webster, head of retail consulting and technology at Capgemini, said, "The market continues to grow ahead of our expectations and this is a crucial time for e-retailers to beat the competition by using innovative strategies and tactical promotions in the run up to Christmas. The web is consistently seen as the place to go for bargains and retailers with an online presence should use this to their advantage."