What Are the Cheapest Cars with the Cheapest Road Tax?

The cheapest cars with the cheapest road tax are usually carefully chosen used models first registered between 1 March 2001 and 31 March 2017. Under the Vehicle Excise Duty rates applying from 1 April 2026, cars in Bands A and B cost £20 a year, while Band C costs £35. The catch is that the exact engine, trim, gearbox, registration date and recorded CO₂ figure all matter. Two cars carrying the same model badge can fall into different tax bands.

Road tax is only one part of the running cost. A £20-a-year car can still be expensive if it needs major repairs, uses more fuel than expected or returns a high insurance quote. Before buying, check the tax attached to the exact registration and run a car insurance comparison. 

Which cars currently have the cheapest road tax?

There is no single model that is always the cheapest to tax. The lowest mainstream annual rate depends on the vehicle’s registration period and the tax system that applies to it.

For cars first registered between 1 March 2001 and 31 March 2017, the official April 2026 V149 tax tables set the annual rate at £20 for Band A cars emitting up to 100g/km of CO₂ and Band B cars emitting 101–110g/km. Band C, covering 111–120g/km, costs £35.

Some of these vehicles were previously advertised as having free road tax. That description is now out of date. From 1 April 2026, the lowest ordinary rate for these low-emission cars is £20 rather than £0.

The vehicle record decides the tax. The badge on the bonnet does not.

Three road-tax systems can apply to apparently similar cars

Registration date matters because the UK does not use one tax system for every car on the road.

For cars registered before 1 March 2001, GOV.UK confirms that tax is based on engine size. From 1 April 2026, the annual rates are £230 for engines no larger than 1,549cc and £375 for larger engines.

A model sold across the April 2017 cut-off can therefore appear almost identical in two classified adverts yet have very different annual tax treatment.

Used cars worth checking for £20 or £35 annual road tax

The following model families include versions that may fall into the lowest tax bands. This is a research shortlist, not a guarantee that every car carrying the name will qualify. Check the registration before paying a deposit.

The current MoneyExpert guide also identifies the Fiesta, i10, Fabia, Focus and Kadjar among model families with low-tax derivatives, while noting that the exact registration and emissions rating matter. Its figures should not be copied blindly, however, because annual rates changed on 1 April 2026. The MoneyExpert low-road-tax guide is best used as a model shortlist, with the government tax record used for the final check.

A £20 tax bill does not automatically make a car cheap

Vehicle tax is visible and easy to compare, which makes it tempting to give it more weight than it deserves.

The bigger costs are often the purchase price, depreciation, insurance, fuel and repairs. Tyres, servicing, MOT work and breakdown cover follow. Tax sits within that list; it does not replace it.

Paying £180 less in annual tax offers little comfort if the chosen car needs a £900 repair soon after purchase. The same applies to a low-tax diesel that spends most of its life on short urban journeys and develops problems with its emissions-control equipment.

Look at the likely three-year cost rather than one line in an advert. Condition and maintenance history can matter far more than the difference between Bands B and C.

Is it worth buying an older car just to reduce road tax?

Sometimes, but the tax saving needs context.

A Band A or B car costing £20 a year will require £60 in tax over three years. A post-April 2017 car paying the £200 standard rate will require £600 over the same period. The difference is £540.

That is meaningful. It is not automatically decisive.

An older car may cost less to buy but need tyres, suspension work, a timing-belt change or other age-related maintenance. A newer car may offer better safety equipment, quieter motorway driving or simply suit the household better. Paying £180 more a year in tax can still be the sensible choice where the newer vehicle is in better condition and avoids foreseeable repairs.

Tax should narrow the shortlist, not make the entire decision.

Check the exact registration, not the seller’s description

Old adverts regularly retain phrases such as “free road tax” or “£20 tax” after the official rates have changed. Treat those claims as prompts to investigate, not as proof.

1. Ask for the registration number.
2. Check the vehicle’s tax information through the official government services.
3. Confirm the date of first registration.
4. Check the recorded CO₂ figure where the emissions-based system applies.
5. Match the engine, trim and gearbox to the actual car.
6. Find out whether an expensive-car supplement remains payable.
7. Verify the details again before collection if the advert has been live for some time.

Vehicle tax does not transfer when a used car is sold. GOV.UK explains that a new keeper must tax the vehicle using the V5C or green new-keeper slip before using it on a public road.

Should you buy a diesel purely for £20 road tax?

No. Many of the lowest-emission pre-2017 choices are diesels, but the tax band does not tell you whether the engine suits your driving.

A diesel particulate filter needs suitable operating conditions to manage the soot it collects. Repeated short journeys can be a poor fit, particularly where the engine rarely becomes fully warm. A driver covering regular longer distances may have a stronger case for choosing one.

Fuel price, emissions-zone rules, maintenance history and the cost of possible repairs also belong in the calculation. Low official CO₂ emissions do not guarantee low total ownership risk.

A £20 diesel is most convincing when the driver’s actual mileage and journeys suit it.

Do electric cars still have free road tax?

No. Electric and zero-emission cars became liable for Vehicle Excise Duty from 1 April 2025.

Under the rates applying from 1 April 2026, GOV.UK states that electric cars registered on or after 1 April 2025 pay £10 in the first year and £200 thereafter. Electric cars registered between 1 April 2017 and 31 March 2025 also pay the £200 standard rate.

Older qualifying electric cars registered between 1 March 2001 and 31 March 2017 pay £20.

That means “tax-free electric car” is no longer an accurate general description. An old review or classified advert may reflect the rules that applied when it was written rather than the current amount due.

Check the original list price on more expensive cars

The used price is not the figure used to decide whether the expensive-car supplement applies.

For petrol and diesel cars within the post-April 2017 system, an original list price above £40,000 can trigger the additional rate. From 1 April 2026, the supplement is £440, taking the annual payment to £640 when added to the £200 standard rate. It is usually payable for five years from the second vehicle licence.

For qualifying zero-emission cars, the threshold applying from 1 April 2026 is more than £50,000. The current GOV.UK vehicle-tax tables explain the standard and additional rates.

A prestige car that has depreciated heavily can therefore remain expensive to tax for part of its life.

Low road tax and low insurance do not always arrive together

An insurer may consider the exact derivative, performance, repair cost, theft and claims history, along with the driver’s age, postcode and intended use. None of those factors is replaced by the road-tax band.

After checking the tax attached to each registration, complete a car insurance comparison using the same driver details for every shortlisted car. 

Readers who want vehicle-specific insurance evidence can use our separate guide to the cheapest cars to insure in the UK. Parents helping a new driver choose a first vehicle may also find the practical setup questions in our article on insuring an 18-year-old son useful.

Seven checks before buying a low-road-tax car

1. Verify the registration date. The cut-off can change the entire tax system.
2. Check the current rate. Do not rely on a historic review or dealer headline.
3. Confirm the CO₂ figure. For pre-April 2017 cars, a small difference can move the car into another band.
4. Match the exact derivative. Engine, trim and gearbox can all matter.
5. Investigate maintenance history. A low annual tax bill cannot compensate for neglected servicing.
6. Calculate three years of ownership. Include tax, fuel, insurance, servicing and realistic repair exposure.
7. Check for the supplement. Use the original list price, not today’s used value.

Descriptions such as “tax exempt”, “free road tax” and “only £20 to tax” can become stale. The official record should settle the question.

Questions about cars with cheap road tax

What is the best route to a genuinely cheap car?

The strongest low-tax candidates are generally pre-April 2017 used cars with verified CO₂ emissions of 110g/km or less. The cheapest car overall, however, is the one that balances condition, purchase price, fuel, maintenance, tax, insurance and suitability for the journeys it will actually make.

Start with the registration number. The badge alone cannot tell you what the car will cost.

My Favourite Voucher Codes publishes practical money-saving information for UK consumers. You can read more about how the website operates. The site also donates 20% of its monthly profits to charities selected through a public poll, with previous recipients and donation information available on the charity page.

Written by Julian House on 19th June 2026