More than 300 vehicles are clamped every day in the UK, according to data released by the DVLA.
The numbers were released as the government agency launched a new campaign urging drivers to tax their cars.
The campaign slogan warns simply, "tax it or lose it".
DVLA chief executive Oliver Morley said: "This campaign targets those who break the law by not taxing their car.
"While the overwhelming majority of vehicles on the road are licensed correctly, it is only right that we take action against those people who think they can get away with it.
"The law is clear and so are the consequences - if you don't tax your car, you risk losing it."
Money raised by Vehicle Excise Duty (VED) has decreased in recent years, falling by £147m between 2014/15 and 2016/17.
There are concerns that tax evasion has increased following the decision to do away with the paper tax disc in 2014 (a number plate recognition system, linked to a DVLA database, has replaced the old physical disc).
However, the DVLA disputes this assertion, stating that VED receipts have gone down due to more people buying tax-exempt vehicles with lower CO2 emissions.
Morley said: "The fact is it's never been easier to tax your car.
"Our online system is available 24 hours a day and with direct debit you can choose to spread the cost over the year.
"There really is no excuse for skipping vehicle tax."
Vehicle tax – what you need to know
- VED varies, based on a vehicle’s CO2 emissions
- Vehicles listed with a price in excess of £40,000 are charged an extra fee
- Find out the table of VED charges here