ASOS, whose fast fashions are popular with shoppers in their twenties, made a pretax profit of £142.1 million (€156 million) in the year to August 31st - in line with guidance in August and up from £33.1 million (€36.3 million) in the same period last year.
Sales rose 19 per cent to £3.26 billion (€3.58 billion) as it served 23.4 million customers, up 3.1 million.
ASOS traded through coronavius lockdowns when store-based rivals had to close shops for weeks.
The group said it had made a "solid" start to the new financial year and was well set up for the peak Christmas trading period.
However, it said it was cautious on the outlook for consumer demand whilst the economic prospects and lifestyles of 20-somethings remain disrupted.
"Whilst life for our 20-something customers is unlikely to return to normal for quite some time, ASOS will continue to engage, respond and adapt as one of the few truly global leaders in online fashion retail," said CEO Nick Beighton.
Shares in ASOS, which have doubled over the last year, closed Tuesday at 5,378 pence, valuing the business at £5.4 billion (€5.9 billion) - more than twice the market capitalisation of Marks & Spencer, Britain's biggest clothing retailer by sales. -Reuters