The personal electronics and homewares retailer, which also owns home appliance retailers The Good Guys and e&s, on Monday reported total sales were up 9.8 per cent to $5.67 billion for the six months to December 31.
The group's earnings before interest and tax was up 8.6 per cent to $419.9 million, and its net profit after tax climbed 8.0 per cent to $285.4 million.
"We are pleased to report strong sales and earnings for HY25," said group CEO Terry Smart.
"In this challenging trading environment, marked by heightened competitor activity, our focus remained on maximising demand through delivering consistently high levels of customer service and exceptional value for our customers."
Sales at the 206 JB Hi-Fi stores in Australia were up 7.2 per cent to $3.88 billion, with key growth in the categories of mobile phones, small appliances, computers, TVs and cameras.
Online sales were up 16.4 per cent to $682.7 million, making up 17.6 per cent of total sales.
Same-store sales at the company's 106 The Good Guys stores climbed 8.8 per cent to $1.52 billion, with growth in floorcare, TVs, portable appliances, cooking and refrigeration.
In January, JB Hi-Fi Australia's same-store sales were up 7.1 per cent, while The Good Guys saw same-store sales climb 5.9 per cent.
"Whilst we are pleased to see sales momentum continue into January, we remain cautious given the uncertainty in the retail market and the continued competitive activity," Mr Smart said.
JB Hi-Fi declared an interim dividend of $1.70 per share, up 7.6 per cent from a year ago.Â
The company ended the year with a $555.1 million in cash, up from $303 million from a year ago.
At 11.15am, JB Hi-Fi shares were up 0.4 per cent to $102.92.