As many as 1.4million people are set to receive a letter from HMRC claiming that they have underpaid tax over the past two years, owing an average of £1,500 each.
About £2bn was underpaid through the PAYE (pay as you earn) system over the past two financial years, with 1.4m people now set to receive demands for the underpaid sum from Her Majesty’s Customs and Revenue.
In addition, around 4.3m have been found to have overpaid tax over the same period, resulting in tax refunds totalling £1.8bn, or £418 on average per person.