To avoid paying the Clean Air Zone charge, your vehicle will need to be

  • A diesel of Euro 6 (VI) standard of better (most new registrations after 1 September 2015)
  • A petrol of Euro 4 standard or better (most new registrations after 1 January 2006)
  • Zero emission, ie electric or hydrogen
  • Low emission, including CNG (compressed natural gas) and hybrids that either meet or go beyond Euro 6 diesel and Euro 4 petrol standards
  • CVRAS (Compliant Vehicle Registered Accreditation Scheme) retrofit solution, including LPG retrofits

If you are considering buying a new car, you should consider the costs over the lifetime of the vehicle. The upfront cost of a diesel or petrol car may be lower than that of an equivalent electric vehicle, but the cost of running an electric car is much lower. The Government also subsidise purchases of some electric vehicles and offer grants for installing home charging points.

The table below compares the annual running costs of a typical Euro 6 diesel and petrol car (first registered in 2017), Euro 4 petrol car (first registered in 2007) and an electric car. It shows that a car owner driving the average 7,800 miles per year would save over £1,000 in fuel and taxes each year with an electric car compared to an old Euro 4 petrol car and would prevent the emission of over two tonnes of carbon dioxide.

Annual Mileage: 7,800 miles

Euro 4 Petrol

Euro 6 Petrol

Euro 6 Diesel

Electric Car

CAZ Charges





Fuel Costs





VED costs





Total annual costs





Total annual cost savings compared to Euro 4 petrol






Tailpipe NOX Emissions

1.1 kg

0.8 kg

7.9 kg

0 kg

Tailpipe CO2 Emissions

2,080 kg

1,569 kg

1,531 kg

0 kg

The Go Ultra Low website has information about what electric and plug-in hybrid (PHEV) vehicles are available and allows you to perform cost calculations based on your exact mileage and vehicle.