Argos has recently been fined £1.5 million by HMRC, and ordered to repay £2.4 million in wages.
The HMRC found that Argos had wrongly not been paying staff to attend briefings and for security checks. This failure to pay brought staff below the national minimum wage.
Repayments are due to more than 37,000 current and ex-employees. These date back to 2014 and more than two thirds of the staff in question are ex-staff.
However, the £1.5 million fine has been reduced to £800,000 because Argos agreed to pay within 14 days.
Similar cases have involved Debenhams (£63,000 fine and £135,000 refund) and Sports Direct (£1 million pay-back ordered).