Number plates

What year is an 18 plate?

18 plates were issued to cars first registered in Great Britain between 1 March 2018 and 31 August 2018. Below: how old those cars are, when the first MOT falls due, the tax rules and the models most often tested. To decode a whole plate, use the number plate age checker.

MOT data updated 28 September 2026. Tax rates for the year from 1 April 2026.

Issued from1 March2018

Issued until31 August2018

Age today8 years

First MOT dueMarchMarch 2021 to August 2021

Which year is it?

An 18 plate covers March to August 2018. The September identifier that follows it is 68.

The plate normally shows when the car was first registered, which can be later than when it was built. A car imported new gets the identifier of its first UK registration. A used import gets an identifier that matches its age (the date it was built or first registered abroad), or a Q plate when its age cannot be proved.

MOT

A car's first MOT is due by the third anniversary of its first registration, then every year. For an 18 plate that first MOT was due between 1 March 2021 and 31 August 2021, depending on the registration date. You can take an MOT up to a month (minus a day) before the due date and keep the same renewal date.

All cars: share of MOT tests that failed at the age these cars are now (DVSA data, 2022 to 2025).
Age	MOT fail rate	Tests (n)
8 years	23.8%	10,440,457

MOT fail rates by make, model and age

Vehicle tax

After the first year, cars first registered from 1 April 2017 pay the standard rate, £200 a year (rates from 1 April 2026).
The expensive car supplement runs from the second to the sixth year a car is taxed, so it no longer applies to cars first registered in this window (the last ones passed six years on 31 August 2024).
Electric cars have paid vehicle tax since 1 April 2025. Their first-year rate depends on the registration date.

Work out the tax for one car

ULEZ and clean air zones

Transport for London's guide: petrol cars that meet the ULEZ standard (Euro 4) are generally those first registered after 2005, though some from 2001 meet it. Diesel cars that meet it (Euro 6) are generally those first registered after September 2015. The year on the plate is a starting point only: the Euro standard of the car decides.

ULEZ and clean air zone checker

Most tested models first used in 2018

The models with the most MOT tests among cars first used in 2018. DVSA's data gives the year of first use, not the month, so this covers every plate issued in 2018, not only this one.

Models first used in 2018: MOT tests 2022 to 2025, counting only the ages with at least 1,000 tests of that model, and the share that failed at the latest such age.
Model	MOT tests (n)	Age	Fail rate	More
Ford Fiesta	375,574	7 years	17.1% (n=93,249)	All years Problems Recalls ULEZ
Volkswagen Golf	249,969	7 years	13.8% (n=61,626)	All years Problems Recalls ULEZ
Vauxhall Corsa	213,179	7 years	27.0% (n=53,047)	All years Problems Recalls ULEZ
Ford Focus	192,323	7 years	18.1% (n=47,441)	All years Problems Recalls ULEZ
Nissan Qashqai	190,418	7 years	20.5% (n=47,260)	All years Problems Recalls ULEZ
MINI Cooper and One	182,639	7 years	13.1% (n=45,282)	All years Problems Recalls ULEZ
Volkswagen Polo	175,789	7 years	25.0% (n=43,887)	All years Problems Recalls ULEZ
Mercedes-Benz A-Class	166,733	7 years	17.4% (n=41,455)	All years Problems Recalls ULEZ
Ford Kuga	155,489	7 years	15.8% (n=38,466)	All years Problems Recalls ULEZ
Kia Sportage	135,831	7 years	17.8% (n=33,805)	All years Problems Recalls ULEZ
Vauxhall Mokka	128,152	7 years	28.9% (n=31,923)	All years Problems Recalls ULEZ
Vauxhall Astra	121,612	7 years	20.0% (n=29,965)	All years Problems Recalls ULEZ

A fail rate depends on age, mileage and upkeep, so compare models of the same age only.

Questions

What year is an 18 plate?

18 plates were issued to cars first registered in Great Britain between 1 March 2018 and 31 August 2018.

When is the first MOT due on an 18 plate?

By the third anniversary of first registration: between 1 March 2021 and 31 August 2021.

Can an 18 plate be on a newer car?

Yes. A private (cherished) number can be moved to a newer car, which then looks older than it is. It can never go on a car first registered before 1 March 2018, because a plate may not make a car look newer than it is. How to transfer a private number plate.

Other plates

Decode a plate: number plate age checker

Before: 67 plates. After: 68 plates. Every age identifier · Area codes (the first two letters)

Found one you might buy? Vet the specific car.

The plate tells you roughly when a car was first registered. The VetTheCar Buying Report brings together the MOT history, mileage readings and running costs of one car before you pay.

See a sample Buying Report Free car tools

Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVLA vehicle registration numbering rules (INF104); DVSA anonymised MOT test data, class 4 normal tests, 2022 to 2025; GOV.UK vehicle tax rate tables (DVLA). MOT data updated 28 September 2026. Tax rates for the year from 1 April 2026.

Not affiliated with or endorsed by DVSA or DVLA. How we calculate these figures · Data sources