Slow retail websites risk billions in lost UK sales

UK online shoppers are abandoning purchases when retail websites load slowly, with new research suggesting delays are driving billions of pounds in lost sales across the sector.

A YouGov survey commissioned by web hosting platform BHOST found that 88% of UK adults have left an online purchase because a website took too long to load. More than half said they would not wait longer than 10 seconds for a page to appear.

The findings come as retailers continue to focus on conversion rates and basket abandonment. Industry data cited in the research estimates lost UK eCommerce revenue from abandoned baskets at about £38 billion in 2024.

Frustration with slow performance appears widespread. About 76% of respondents described slow-loading websites as "frustrating". The results suggest shoppers are sensitive to delays across the journey, from discovery pages to checkout screens.

Checkout Pressure

Millennials, defined in the research as those aged 25 to 44, were the least tolerant of delays. The survey found that 92% said they would abandon a slow website, and more than 65% identified payment and checkout pages as the biggest source of frustration when they load slowly.

The results add to the broader body of research linking site performance to sales. A Google study cited alongside the findings reported that a 0.1-second change in load time can influence user behaviour, with conversions rising by 8% for retail sites and 10% for travel sites on average.

Retailers have invested in user experience as consumers move between devices and expect consistent performance. Page speed depends on factors such as site build, content delivery, and the shopper's connection. Even so, the survey suggests many customers still blame the retailer for delays, whatever the cause.

Dave O'Hearns, founder of BHOST, said, "Millennials expect the internet to keep up with them. They're used to seamless apps and instant information. Growing up as the internet evolved, they expect much more from online shopping, so a lagging site feels like a broken promise. Gen Z have grown up with mobile networks and patchy Wi‑Fi, so they'll tolerate a delay or two, but that patience won't last long."

City Differences

The research also pointed to differences by location. Nottingham emerged as the most "impatient" city in the study, with 48% of respondents there saying they would leave a website within seconds if it did not load. Manchester followed on 46% and Birmingham on 44%. Leeds was recorded at 42%, with London on 41%.

BHOST cited official population estimates for Nottingham of 323,632 and applied the survey figure to suggest more than 155,000 people in the city could be abandoning slow-loading websites. The claim is illustrative rather than transactional, but it shows how quickly performance issues can translate into lost attention for businesses that rely on online bookings, eCommerce, and lead generation.

O'Hearns linked speed to both brand perception and usability.

"Speed is part of the user experience now. If a page takes too long, visitors assume the business behind it is outdated," he said.

Consumer Factors

The research also included consumer guidance on whether slow browsing is caused by a site or the user's own connection. Suggested steps included restarting the modem and router, running a speed test, and improving router placement in the home. It also recommended limiting bandwidth-heavy activity on other devices while shopping online, and upgrading older routers or broadband plans where necessary.

While these actions sit with consumers, the survey highlights the commercial risk for retailers when customers face friction online. With most respondents unwilling to wait beyond 10 seconds, even brief delays can push shoppers to rival sites or marketplaces that feel faster.

The YouGov research surveyed 2,000 UK adults and was weighted to be representative of the UK population aged 18 and over. BHOST expects site speed and perceived reliability to remain a competitive factor for retailers targeting millennials, who reported the highest levels of frustration at checkout.