Free ULEZ Checker: Is Your Car Compliant? (2026 Guide)

If you have ever typed "is my car ULEZ compliant" into Google, you are not alone. It is one of the most common questions I hear from both car buyers and dealers. With clean air zones now active in several UK cities - and more potentially on the way - knowing whether your vehicle meets the required emission standards is no longer optional. It is essential.

I have spent years working in car sales before founding Vehiso, and I have watched the shift happen in real time. Buyers are increasingly filtering their searches by ULEZ compliance, and dealers who do not display this information clearly on their listings are losing out.

In this guide, I will walk you through everything you need to know: what ULEZ actually is, which cities have clean air zones, how to check your vehicle for free, what happens if you get caught out, and what your options are if your car does not meet the standard.

What is ULEZ and why does it exist?

ULEZ stands for Ultra Low Emission Zone. It is a designated area where vehicles that do not meet specific emission standards are charged a daily fee to drive. The goal is straightforward - reduce air pollution in areas where it poses the greatest risk to public health.

London introduced the first ULEZ in April 2019, initially covering central London only. It was expanded to the inner London area in October 2021, and then extended London-wide in August 2023. That final expansion was controversial, but the data since has shown meaningful reductions in roadside nitrogen dioxide levels.

Other UK cities have followed with their own versions, typically called Clean Air Zones (CAZ). The principle is the same - if your vehicle does not meet the minimum emission standard, you pay to enter.

The bottom line is this: if you drive in or around any major UK city, you need to run a ULEZ compliance check on your vehicle. And if you are buying a used car, it should be one of the first things you look at.

Which UK cities have clean air zones?

Here is a breakdown of the active clean air zones across the UK as of 2026, along with their daily charges for non-compliant vehicles:

A few things worth noting here. London is the only city that charges private cars £12.50 per day. Birmingham and Bristol also charge non-compliant cars and vans. Bath, Bradford, and Portsmouth only charge heavier commercial vehicles - private cars are not affected in those zones, regardless of their emissions.

That said, these zones are reviewed regularly. More cities could introduce charges for private cars in the future, and existing zones could tighten their standards. If you are buying a car in 2026, future-proofing against emission requirements is a smart move.

Which vehicles are ULEZ compliant?

The compliance rules are based on Euro emission standards, and they differ between petrol and diesel vehicles:

Petrol vehicles

Your petrol car or van needs to meet Euro 4 or later to be compliant. In practical terms, this generally means vehicles registered from around 2006 onwards. Most petrol cars from 2006 and later will pass, though there are some exceptions with older models that were registered late in a production run.

Diesel vehicles

Diesel is where it gets stricter. Your diesel car or van needs to meet Euro 6 or later. This generally means vehicles registered from around September 2015 onwards. Some manufacturers hit Euro 6 earlier than others, so it is always worth checking your specific vehicle rather than relying on the year alone.

Electric and hybrid vehicles

All fully electric vehicles are exempt from ULEZ and clean air zone charges. They produce zero tailpipe emissions, so they will always be compliant.

Plug-in hybrids and standard hybrids still need to meet the relevant Euro standard for their engine type (petrol or diesel). Most modern hybrids will be fine, but again - check rather than assume.

Motorcycles and mopeds

Motorcycles, mopeds, and similar L-category vehicles need to meet Euro 3 to be ULEZ compliant. Generally, this means those registered from around 2007 onwards.

How to find your vehicle's Euro standard

Your vehicle's Euro emission standard is listed on your V5C registration document (logbook). Look for the emissions information section. If you do not have your V5C to hand, you can check using your registration number through the tools I mention below.

How to check if your car is ULEZ compliant

There are several ways to run a ULEZ compliance check on your vehicle, and all of them are free.

1. TfL ULEZ vehicle checker

Transport for London provides an official ULEZ checker on their website. Enter your vehicle registration number and it will tell you whether your car meets the ULEZ emission standards. This tool covers the London ULEZ specifically, but since London has the strictest standards for private cars, if you pass here you will generally be compliant in other UK clean air zones too.

2. Vehiso's free ULEZ checker

We built a free ULEZ checker tool at Vehiso that lets you check any vehicle's compliance status instantly using its registration number. It covers not just London's ULEZ but also other UK clean air zones, giving you a clear picture of where your vehicle can travel without charges.

3. GOV.UK clean air zone checker

The government also provides a clean air zone vehicle checker that covers all the official clean air zones outside of London. Enter your registration and select the city, and it will tell you whether your vehicle would be charged.

4. Check your V5C

As I mentioned above, your vehicle's Euro emission standard is on your V5C logbook. Cross-reference this against the standards I listed earlier (Euro 4 for petrol, Euro 6 for diesel) and you will have your answer.

My recommendation? Use an online checker to be certain. The year-of-manufacture rule of thumb is useful, but it is not bulletproof. Some vehicles were manufactured to an older standard even after the new one came into force.

What happens if you drive in a clean air zone without paying?

If your vehicle is not compliant and you drive within a ULEZ or clean air zone without paying the daily charge, you will receive a Penalty Charge Notice (PCN).

London ULEZ penalties

• Daily charge if paid on time: £12.50
• Penalty Charge Notice: £180, reduced to £90 if paid within 14 days
• The charge applies every day you drive within the zone, so a week of non-compliance could result in multiple PCNs

Other clean air zone penalties

Penalties vary by city but typically follow a similar structure:

• Birmingham: £120 PCN, reduced to £60 if paid within 14 days
• Bristol: £120 PCN, reduced to £60 if paid within 14 days
• Bath and others: Similar penalty structures for applicable vehicle categories

The zones use Automatic Number Plate Recognition (ANPR) cameras, so there is no barrier or checkpoint. If your vehicle is non-compliant and you drive through, the cameras will pick it up and a PCN will arrive in the post. There is no way to avoid detection.

It is also worth noting that the daily charge resets at midnight. If you drive into the zone at 11pm and leave at 1am, that counts as two days.

For car dealers: why ULEZ compliance matters on your listings

This section is specifically for dealers, and I want to be direct about it.

If you are selling used cars in 2026 and your website does not clearly show whether each vehicle is ULEZ compliant, you are making life harder for your buyers - and losing sales because of it.

I have spoken to hundreds of dealers through Vehiso, and the pattern is clear. Buyers in and around London, Birmingham, and Bristol are actively filtering for ULEZ-compliant vehicles. If your listing does not state the compliance status upfront, many buyers will simply move on to a dealer whose listings do.

What buyers want to see

Buyers do not want to have to look up a registration number on a separate tool. They want to see, right there on the listing page, whether a car is compliant with the ULEZ and clean air zones. This is especially true for buyers searching from their phones - they want quick, clear information.

How Vehiso handles this automatically

At Vehiso, we built ULEZ and clean air zone compliance directly into our dealer websites. When you list a vehicle on a Vehiso-powered dealer website, the system automatically checks and displays the vehicle's compliance status. There is no manual data entry required - it happens based on the vehicle's registration and specification data.

This means every car on your site shows buyers immediately whether it is ULEZ compliant, which clean air zones it can enter without charge, and what the relevant Euro emission standard is. It is one less reason for a buyer to leave your site, and one more reason for them to pick up the phone or submit an enquiry.

If you are a dealer looking to improve your online presence, have a look at our guide on how to build a car dealer website - it covers how features like automatic ULEZ compliance display fit into a broader strategy for attracting and converting buyers online.

What to do if your vehicle is not compliant

If you have run a ULEZ compliance check and your vehicle does not meet the standards, you have several options.

1. Scrappage schemes

Some local authorities offer scrappage or financial assistance schemes to help you switch to a compliant vehicle. London's scrappage scheme has gone through several rounds - check the TfL website for the latest availability. Birmingham and other cities with active clean air zones have also offered similar support at various times.

These schemes typically offer a grant or payment towards scrapping your non-compliant vehicle and purchasing or leasing a compliant replacement. Eligibility criteria vary, so check the specifics for your area.

2. Retrofitting

For some vehicles - particularly larger commercial vehicles like HGVs, buses, and coaches - retrofitting an approved emissions reduction system can bring them up to the required standard. This is less common for private cars, but it is an option for fleet operators and commercial vehicle owners.

The Clean Vehicle Retrofit Accreditation Scheme (CVRAS) maintains a list of approved retrofit solutions. Your vehicle would need to be fitted with an accredited system and then re-tested to confirm compliance.

3. Switch to a compliant vehicle

The most straightforward option for most people. If your car does not meet Euro 4 (petrol) or Euro 6 (diesel), it is likely at least 10 years old for petrol or 11 years old for diesel. At that age, running costs, reliability, and maintenance are often climbing anyway.

If you are looking to buy a compliant replacement, make sure ULEZ compliance is one of your search criteria. Any reputable dealer should be able to confirm the Euro emission standard of their stock. If you are buying from a dealer with a Vehiso-powered website, the compliance status will already be displayed on every listing.

For a broader look at what to consider when buying a used car, our guide on the best cars for new drivers covers some excellent options that also happen to be ULEZ compliant.

4. Avoid the zones

This is the least practical option for most people, but it is technically available. If you rarely drive into a city with a clean air zone, you might decide to keep your non-compliant vehicle and simply plan your routes to avoid charged areas. In London, where the ULEZ now covers the entire Greater London area, this is very difficult. In other cities with smaller zones, it may be more feasible.

5. Pay the daily charge

If you only occasionally need to enter a clean air zone, paying the daily charge might work out cheaper than changing your vehicle. At £12.50 per day in London or £8-£9 in Birmingham and Bristol, the maths depends on how often you need to drive in.

Frequently asked questions

What is ULEZ?

ULEZ stands for Ultra Low Emission Zone. It is an area in London where vehicles must meet minimum emission standards or pay a daily charge of £12.50. The zone was expanded to cover all of Greater London in August 2023. Other UK cities operate similar schemes called Clean Air Zones.

How much is the ULEZ charge?

The London ULEZ charge is £12.50 per day for cars, motorcycles, and vans that do not meet the emission standards. For heavier vehicles such as HGVs, buses, and coaches, the charge is £100 per day. Other cities have different rates - Birmingham charges £8 per day and Bristol charges £9 per day for non-compliant cars and vans.

Which cars are ULEZ compliant?

Petrol cars that meet Euro 4 emission standards (generally those registered from 2006 onwards) are compliant. Diesel cars need to meet Euro 6 (generally registered from September 2015 onwards). All fully electric vehicles are exempt. You can check your specific vehicle using the Vehiso ULEZ checker or the TfL vehicle checker.

What happens if I drive in ULEZ without paying?

You will receive a Penalty Charge Notice (PCN) of £180, which is reduced to £90 if paid within 14 days. The zone is monitored by ANPR cameras, so non-compliant vehicles are detected automatically. Each day you drive in the zone without paying incurs a separate penalty.

Do I need to pay ULEZ if my car is compliant?

No. If your vehicle meets the emission standards, you can drive in the ULEZ and other clean air zones without any charge. There is nothing to register or pay - compliant vehicles are automatically recognised by the ANPR cameras.

Is the ULEZ charge the same as the Congestion Charge?

No. The ULEZ charge and the London Congestion Charge are two separate charges. If your car is non-compliant with ULEZ and you drive in the Congestion Charge zone during charging hours, you would need to pay both - £12.50 for ULEZ plus £15 for the Congestion Charge, totalling £27.50 per day.

Can I check ULEZ compliance for free?

Yes. You can use the Vehiso free ULEZ checker, the TfL vehicle checker, or the GOV.UK clean air zone checker. All are free and only require your vehicle registration number.

More from the Vehiso blog

If you found this guide useful, here are some other posts from the Vehiso blog that you might find helpful:

• How to Build a Car Dealer Website - A complete guide for dealers looking to get online or upgrade their existing site.
• Best Cars for New Drivers - Our picks for reliable, affordable, and ULEZ-compliant first cars.
• How to Tax Your Car - Everything you need to know about vehicle tax rates and how to pay.
• Car Supermarket vs Dealership - Comparing the pros and cons of each when buying your next car.
• Vehiso Dealer Management System - See how Vehiso helps car dealers manage stock, build websites, and display ULEZ compliance automatically.