Revenue from vehicle excise duty has fallen by £93 million in the year following the abolition of the paper tax disc, the Driver and Vehicle Licensing Agency’s newly published annual report and accounts show*.The DVLA’s accounts show revenue from vehicle tax fell from £6.023 billion at the end of March 2015 to £5.930bn a year later.The RAC, which was fearful that the impact of the scrapping of the tax disc would lead to a loss in revenue due to increased evasion, is now concerned the loss has proved to be even greater than the government’s own estimate of £80m over the course of 2015.A year ago the Department for Transport conducted a roadside survey which projected that about 1.5% of all vehicles on the road were unlicensed – the equivalent of about 560,000 vehicles – a rate of 1.4% unlicensed vehicles, compared with 0.6% in 2013 – or the equivalent of 210,000 vehicles.As a result the Department's statisticians estimated a loss to the exchequer of around £80m. In Great Britain specifically they estimated annual losses would rise from £35m in June 2013 to £78m in June 2015.While the RAC understands there may be other factors affecting the DVLA’s revenue loss such as greater numbers of ‘cheaper to tax’ low carbon emission vehicles being taxed, it is concerned the figure may continue to rise in the coming years as a result of increased evasion.In order to understand the true extent of the evasion problem, the RAC believes another roadside survey of unlicensed vehicles should be carried out this summer – a year earlier than it would normally be undertaken – so the government can get an up-to-date assessment of the evasion situation.RAC spokesman Simon Williams said: “It is worrying that the reduction in revenue from vehicle tax has exceeded the government’s own estimate. Some may argue that a £93m loss is only £13m higher than expected, this represents an increase of £58m on the corresponding period before the tax disc was abandoned and far exceeds the £10m savings arising from no longer issuing tax discs. This loss is a significant sum and one that merits further investigation.“We urge the Department for Transport to carry out another roadside survey of unlicensed vehicles this year to fully assess the untaxed vehicle situation. If this were to find that the number of untaxed vehicles is still at the same rate as when the last survey was conducted or, worse still, has increased, then action needs to be taken urgently to counter this.”In September 2014 the RAC estimated the Treasury could lose up to £132m on top of the £35m the DVLA said was lost from evasion the year before, making for a total loss of £167m. This was based on vehicle tax evasion following a similar path to the number of uninsured drivers of which there are believed to be around one million illegally using Britain’s roads.