Diesel cars have a complicated relationship with road tax. While they often match petrol cars on standard annual rates, their first-year VED charges can be significantly higher — and additional environmental surcharges apply in cities across the UK. Here is a full breakdown of diesel car tax in 2026.
First-Year VED for Diesel Cars
Diesel cars registered from April 2025 pay first-year VED based on their CO2 emissions. The difference from petrol is that diesel cars start in a higher CO2 band: most diesel cars emit over 130g/km of CO2, placing them in the £205 to £1,565 first-year band range. A typical 2.0-litre diesel family car emitting around 150g/km pays £260 for the first year. The highest-emitting diesel cars — often large SUVs — can pay £2,605 for the first year.
Standard Annual VED Rate
From year two onward, diesel and petrol cars pay the same standard annual VED rate. The standard rate for petrol and diesel cars is £190 per year. This standard rate has applied since 2017-18 and has not changed since. Whether you drive a petrol supermini or a diesel SUV, both pay £190 from year two. The fuel type distinction in VED has essentially disappeared after year one.
Premium Rate Surcharge for Diesel Cars
There is no diesel-specific premium rate for road tax — the premium supplement of £410 per year (years two through six) applies to any vehicle with a list price over £40,000, regardless of fuel type. A diesel BMW X5 over £40,000 list price pays the same £410 premium as an equivalent petrol model. The premium rate is driven by list price, not CO2 or fuel type. Check the VED rate tables on GOV.UK for full band listings.
Diesel in Clean Air Zones and ULEZ
While not strictly road tax, diesel cars face significant additional charges in Clean Air Zones and London's Ultra Low Emission Zone. Diesel cars that do not meet Euro 6 emission standards face daily charges of up to £12.50 in Birmingham's CAZ and £15 in London's ULEZ (expanded zone). Older diesel vehicles — particularly pre-2015 — may face these charges every day they are driven in affected zones. Factor these charges into the total cost of owning a diesel car.
Company Car BIK for Diesel
For company car drivers, diesel cars attract higher Benefit in Kind rates than equivalent petrol models due to their higher CO2 emissions. A diesel company car emitting 140g/km at 35% BIK rate on a £35,000 P11D value costs £12,250 per year in BIK tax — nearly double that of an equivalent 120g/km petrol car at 28% BIK. Diesel company cars are increasingly losing their appeal for employee tax efficiency.
Residual Values and Future Costs
Diesel cars are depreciating faster than petrol and electric alternatives due to regulatory pressure, clean air zone restrictions and consumer preference shifts. This affects the total cost of ownership beyond VED. Diesel makes most financial sense for high-mileage drivers — those covering 30,000+ miles annually — where the superior fuel efficiency offsets the higher first-year VED and environmental charges. For average drivers, a petrol or hybrid may be more cost-effective overall.