The Warehouse repaid the $68m it received in Government wage subsidies in December after it came under fire from unions, commentators and some politicians, including the Prime Minister, for taking the money, proceeding to lay off staff then reporting a full-year profit of $44.5m.
The group said it had made the decision to repay the subsidies after experiencing strong trading in the lead-up to Christmas.
Without the subsidy, the company would have made a loss of just over $4m.
First-quarter sales for the group increased by 6.3 per cent and now stand up 6.6 per cent year-to-date compared to the same period last year - better than what it had expected.
Full-year guidance and its half-year financial results will be released in March.
Shares in The Warehouse are up 4c, or 1.45 per cent, to $2.70 so far today.
Retail consultant and analyst Chris Wilkinson, managing director of First Retail Group, said the $20m profit upgrade was impressive — and reflected strong spending trends seen across the industry.
"This reflects where a lot of retailers are sitting at the moment, particularly the larger retailers; they have all benefited from strong consumer confidence and that has translated into sales and [increased] profitability," Wilkinson told the Herald.
Less discounting across the sector as a result of supply issues and increases in freight charges, along with sustained strong property values, were driving strong earnings among retailers, he said.
"Large retailers right through to smaller ones are reporting very strong consumer confidence driving foot fall, average sales values are much higher and transaction volumes are up."
Improved efficiency in recent months and years, including reducing its staff numbers and merging Warehouse and Warehouse Stationery stores, was now beginning to pay dividends for the group, Wilkinson said.
Its investment in online and digital retailing in recent years would have also paid off in recent months, he said, adding that there was still more work to be done for the group to realise its full potential.
"The Red Sheds have still got quite a long way to go in terms of transforming their offer, especially given the strong competition from the likes of Briscoes and Kmart."