Annual profits have quadrupled for online fashion group Asos thanks to cost-cutting action and as customers returned fewer items amid the pandemic.

The firm reported pre-tax profits of £142.1 million for the year to August 31, up 329% from £33.1 million a year earlier, as sales jumped 19% including 18% growth in the UK.

Get more updates, news, views and analysis from BusinessLive direct to your inbox

Nick Beighton, chief executive of Asos, said: “Life for our 20-something customers is unlikely to return to normal for quite some time.”

But he said in the face of the pandemic, Asos had “met this challenge head on”.

“We’ve driven efficiency and have emerged a stronger, more resilient and agile business,” he added.

Asos shrugged off soaring costs due to the pandemic by making savings across the group, while a trend for customers to buy more carefully and return less also offset plunging demand for “going-out” items.

It said shoppers were returning fewer items because they have changed what they buy on the site, switching from formalwear to products such as activewear and mascara, which are less likely to be sent back in normal times.

Mr Beighton also said that the company has sought to bulk up on popular ranges, such as leisurewear, amid significant pressure on supply across the sector.

“There has been a focus on planning to ensure we’ve built up stocks in the areas we expect to see demand continue,” he said.

“There are issues across all countries that supply which is affecting the whole industry.

“We are also still keeping an eye on how sales trends are differing in the South, Midlands and North as different areas face lockdown restrictions. It’s too early to say yet but this could affect demand.”

This helped deliver a profit tailwind of around £45 million, according to the group.

It said it had made a “solid start” to the new year and expects an ongoing increase in underlying profits.

But it cautioned over the outlook for consumer demand as it said “economic prospects and lifestyles of 20-somethings remain disrupted” due to the coronavirus crisis.

Asos said UK customer numbers rose 11% over the year to 7 million.