UK Car Tax Bands Explained

When people talk about “car tax bands”, they usually mean Vehicle Excise Duty, often shortened to VED. The confusing part is that there is not one single system. The amount a car costs to tax depends mainly on when it was first registered and, in many cases, its official CO2 emissions figure.

In practice there are three separate systems still running side by side on UK roads, plus a handful of special cases. Which one applies to a car is fixed at the moment it is first registered and never changes afterwards — so a 2015 car will still be taxed under the 2015 rules in 2030.

Cars Registered On or After 1 April 2017

Modern cars use a two-stage system. The first year rate depends on CO2 emissions. After that, most petrol and diesel cars move onto a standard annual rate, with extra cost for cars that had a list price above £40,000 when new.

• Lower-emission cars usually pay less in year one.
• After year one, most cars pay the same standard rate.
• Expensive cars can attract the luxury supplement for several years.

Two details in this system catch buyers out regularly.

The first-year rate is usually paid by the original buyer, not you. It is charged once, when the car is first registered. If you are buying a three-year-old car you will pay the standard rate, so a headline-grabbing first-year figure on a high-emission car is not a cost you inherit. It does, however, depress that car's resale value, which works in your favour as a buyer.

The expensive car supplement follows the car, not the owner. If the manufacturer's list price when new was above £40,000, an additional annual amount is charged on top of the standard rate for five years, starting from the second time the vehicle is taxed. This is based on the original list price including options — not what you are paying now. A car bought second-hand for £22,000 can still carry the supplement because it listed at £41,000 when new. Always establish whether a nearly-new car you are considering is caught by this, because it is a recurring cost for several years and it is invisible unless you look for it.

Diesels are treated slightly differently. A diesel car that does not meet the RDE2 emissions standard is charged a higher first-year rate, effectively one band up from where its CO2 figure alone would place it. Again this affects the first year only, but it is another reason older diesels have fallen in value.

Cars Registered Between 1 March 2001 and 31 March 2017

These are the classic CO2 tax-band cars. They sit in bands such as A, B, C and so on, with lower emissions attracting lower annual VED. This is why two apparently similar hatchbacks from the same era can have noticeably different tax costs.

There are thirteen bands, lettered A through M, set by the official CO2 figure recorded for the vehicle. The gap between the bottom and top of the range is substantial — a difference of several hundred pounds a year between a small efficient hatchback and a large petrol estate of the same age.

This era is where the biggest bargains and the biggest traps both sit. Band A, for cars emitting up to 100g/km, historically attracted a zero annual rate. A number of small diesels from roughly 2009 to 2015 fall into the lowest bands, which means a fifteen-year-old car can cost nothing or very little to tax. Equally, a large-engined car from 2003 can sit in one of the top bands and cost more each year in VED than a modern equivalent. Because the band is locked in at registration, no amount of careful driving changes it.

When comparing two cars from this period, the CO2 figure is one of the most useful numbers you can get hold of, and it is worth checking before you view rather than after.

Cars Registered Before 1 March 2001

Older vehicles predate CO2-based taxation entirely. They are charged on engine size instead, using a simple two-tier split: one rate for engines up to 1549cc and a higher rate for anything above that. There is no emissions component at all, which is why a large-engined classic can be surprisingly cheap to tax relative to its thirst for fuel.

Electric and Alternative Fuel Vehicles

This area changed significantly from April 2025, and a lot of older advice online is now out of date. Electric vehicles were exempt from VED for years; they are not any more. Zero-emission cars now pay VED, with newly registered EVs charged a low first-year rate before moving onto the standard rate, and existing EVs moved onto the standard rate for their registration era.

The expensive car supplement also now applies to electric vehicles. Because EVs have tended to carry higher list prices than equivalent petrol cars, a used EV is more likely than you might expect to be caught by the £40,000 threshold. If you are looking at a nearly-new electric car, check the original list price specifically.

The practical point for buyers: do not assume an electric or hybrid car is free to tax. Check the actual figure for that specific vehicle.

Vehicles That Pay Nothing

Some vehicles sit in a zero-rate class. They still have to be taxed — the amount is simply nil, and the paperwork is not optional.

• Historic vehicles over 40 years old. This is a rolling threshold, so more cars become eligible each year, but the class must be applied for. It does not happen automatically.
• Vehicles used by a disabled person or carrying a valid disability exemption. The exemption belongs to the person and their eligibility, not permanently to the car.
• Some historic band A cars from the 2001–2017 CO2 system, as described above.

Road Tax Does Not Transfer When You Buy

This is the single most common and most expensive misunderstanding about car tax, and it catches out private buyers constantly.

Since October 2014, vehicle tax has not transferred with the vehicle. The moment a car is sold, the seller's tax is cancelled and they automatically receive a refund for any full months remaining. That means the car you have just bought is untaxed, regardless of what the seller told you or what any remaining tax period would suggest.

You must tax it in your own name before you drive it away. Doing this online takes a couple of minutes using the twelve-digit reference from the new keeper slip of the V5C, and you can drive as soon as it is done. Driving away untaxed risks a fine and, since enforcement is automated through number plate recognition rather than a disc in the window, it is very likely to be noticed.

Two related points worth knowing. If a car is currently declared SORN — officially off the road — the SORN ends when the vehicle is sold, so you cannot rely on the previous declaration and must either tax it or make your own SORN declaration. And if you pay by Direct Debit or in six-month instalments rather than a single annual payment, a small surcharge applies, so paying annually is marginally cheaper if your cash flow allows it.

Why Buyers Should Care

Running costs matter. A used car that looks cheap to buy may still be expensive to own if tax, insurance and fuel costs are high. When you compare two similar cars, VED can be a useful tie-breaker, especially for higher-mileage or family-use vehicles where every annual cost adds up.

What to Check Before You Buy

1. Confirm the exact first registration date, not just the model year.
2. Check the recorded CO2 figure where relevant.
3. Review MOT history at the same time so you do not focus on tax alone and miss reliability problems.
4. Compare tax with insurance, fuel type and likely maintenance costs.

Tax Is Only One Part of the Picture

A low-tax car with repeated MOT failures can still be poor value. Likewise, a slightly higher-tax car with an excellent maintenance record may be the better buy overall. Always look at tax, MOT history, mileage, known defects and insurance together.