HM Revenue & Customs is doubling its team aimed at tackling wealthy tax avoiders to more than 200 inspectors.
The Affluent Compliance Team is to begin recruitment of 100 additional inspectors as the work of the unit expands.
In addition to taxpayers with an annual income of more than £150,000 and wealth of between £2.5m and £20m, the unit will also cover those with wealth in the range £1m to £2.5m.
By the end of December, the unit had brought in an extra £75m in tax with a target of £586m by the end of 2015.
Exchequer Secretary David Gauke says: ““HMRC set up the new Affluent Team from some of the £917m made available in 2010.
He says: “The team has made a great start by bringing in £75m in additional tax that would otherwise have been lost to the country.
“The vast majority of people pay their way. Dodging tax is immoral, illegal and unaffordable and the minority who cheat are increasingly finding that, thanks to the work of the Affluent Team, they have made a big mistake.”
Director of the Affluent Team Roger Atkinson says: “Good quality intelligence is central to catching the cheats and so we are expanding our Affluent Intelligence Unit fourfold. This is very good news for all honest taxpayers.”