Motorists paid £41m in fines for unpaid car tax in 2016 compared to £10m in 2015
Fines for unpaid car tax have risen four-fold since paper discs were axed.
Motorists were hit by £41million in penalties last year, up from £10million in 2015, the DVLA said.
But revenue raised by vehicle excise duty fell £54million as lower emissions saw tax rates drop.
Tax discs bearing an expiry date used to be displayed on vehicle windscreens, but the system was scrapped nearly in 2014 as a cost saving measure.
It means most drivers rely on getting a reminder through the post when they need to renew their vehicle tax.
Drivers who fail to pay or renew their vehicle excise duty can be fined up to £1,000.
Vehicles clamped for non-payment rose 166 per cent and out-of-court settlements by 170 per cent.
While the licensing body did not reveal how many drivers were fined, in 2014 it clamped 60,000 motorists for not paying their road tax.
This suggests that nearly 160,000 drivers were clamped for non-payment last year.
The DVLA said it planned to introduce a new internet-based service to make it easier for drivers to comply with the law.