The number of shoppers visiting UK stores on Boxing Day dropped 4.5% compared to 2016.
High streets were hardest hit, falling 5.9% year on year, according to Springboard.
Shopping centres dropped 3.5%, while retail parks were down 2.1%.
Springboard said it was “one of the most challenging” Boxing Days for bricks and mortar stores since it first published Boxing Day data in 2012.
Diane Wehrle, insights director at Springboard said: “This undoubtedly reflects the extent of discounting that has already occurred – particularly over Black Friday – and also the growth in online trade this year. In addition to this, Black Friday now rivals Boxing Day in terms of the volume of footfall generated and so its influence as a key trading day in the retail calendar has been diluted.”
Jace Tyrrell, chief executive at New West End Company, which represents Bond Street, Oxford Street and Regent Street businesses added: “The Boxing Day sales in London’s West End continue to be popular with many domestic and international shoppers out in force. Chinese shoppers in particular have helped boost till receipts to £20m by lunchtime, with luxury purchases such as handbags and winter fashion in high demand. Although footfall was down in single digits on last year we are still expecting solid sales, with average spend increasing and over £50m to go through West End tills.”