Tax fraud has returned to a peak not seen since the start of the financial crisis.
New figures revealed tax fraud crimes now account for close to half of all fraud reported in the UK.
The data from accountancy BDO showed that tax fraud now accounts for 44% of Britain's total.
HMRC lost £603 million to tax fraud, BDO said.
The figures follow HMRC's decision to go public with the names and photographs of the biggest tax dodgers it managed to jail in 2012, revealing the group was sentenced to a collective 150 years behind bars.