Britons spent more than £23 billion over the internet in the first three months of 2014.
This is according to the latest IMRG Capgemini e-Retail Sales Index, which revealed this is up 17 per cent on the preceding period and represents the strongest level of quarterly growth seen since 2011.
One of the main areas in which people spent was accessories, with online trade in this sector rising 34 per cent.
Increases were also recorded for footwear (22 per cent), health and beauty (23 per cent) and home and garden (21 per cent).
IMRG and Capgemini said this growth has been generated by online shoppers spending more per purchase, rather than a significant rise in the number of people who buy online.
Tina Spooner, chief information officer at IMRG, stated: "These results not only demonstrate an overall increase in consumer confidence, but also that online shopping is becoming a larger part of our everyday lives."