How many UK Clean Air Zones are operational?

Fourteen as of April 2026: London ULEZ (£12.50), Birmingham CAZ (£8), Bath (£9), Bristol (£9), Sheffield (£10), Bradford (£9), Newcastle & Gateshead (£12.50), North Tyneside (£12.50), Oxford ZEZ (£10 for all non-EVs), Portsmouth (£9), and four Scottish LEZs (Glasgow, Edinburgh, Dundee, Aberdeen — £60 penalty with no daily charge option). Several others (Greater Manchester, Cambridge) are in consultation.

What Euro standard do I need to be compliant?

Petrol vehicles need Euro 4 or higher (broadly, post-January 2006 registration). Diesels need Euro 6 (broadly, post-September 2015). EVs and hydrogen vehicles are always compliant. Oxford ZEZ is the exception — it requires Euro 6 petrol and Euro 6 diesel, with only EVs exempt.

How do I check my vehicle's Euro standard?

Your V5C logbook shows the Emissions Class (e.g. "Euro 6"). For the official check, enter your registration at gov.uk/check-ulez — it uses DVLA data and confirms compliance for ULEZ and most CAZ zones.

What happens if I don't pay the daily charge?

English CAZ/ULEZ: pay within 14 days online or you get a Penalty Charge Notice (£180, halved to £90 if paid in 14 days). Scottish LEZs: no daily charge exists — you get a £60 PCN that doubles for repeat offences in 90 days up to £480 (cars) or £960 (buses/LGVs).

Does a scrappage scheme apply?

London offers grants up to £2,000 for compliant replacements for ULEZ-affected residents. Birmingham, Bath, Bristol and some others have run schemes in the past. Check your local authority's current scheme before budgeting an upgrade.

I'm only in the zone occasionally — should I upgrade?

Run the calculator with your actual weekly entries. If payback is >4 years and your current vehicle is reliable, keep paying daily. If payback is <2 years (typical for daily commuters to London/Birmingham/Oxford), upgrading usually wins.

Is motorcycle charging different?

Motorcycles in ULEZ need Euro 3 (post-2007). They pay the same £12.50 daily if non-compliant. Most CAZ zones exempt motorcycles entirely — check your zone's specific rules.

Do blue badge / disabled drivers pay?

Most zones offer exemptions or extended grace periods for blue badge holders, but rules vary by authority. London ULEZ has a disabled exemption until October 2027. Check your zone's specific concessions list.

Clean Air Zone / ULEZ Daily Cost Calculator UK [2026]

How This Tool Works

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📋 Purpose

Driving an older petrol or diesel into a Clean Air Zone can cost £400–£3,000 per year, yet many drivers have no idea if their car is compliant. This tool uses the current zone rules for all 14 UK CAZ/ULEZ/LEZ/ZEZ schemes, checks your vehicle fuel type and Euro standard, and shows your real cost over time — plus a clear payback analysis for whether to upgrade to a compliant car or keep paying daily. It also flags the Scottish LEZs where there is no daily charge option, only £60 PCNs.

⚙️ How It Works

1
Select the Clean Air Zone you drive into.
2
Enter your vehicle fuel type (petrol/diesel/hybrid/EV).
3
Enter your vehicle Euro emissions standard from the V5C.
4
Enter the number of days per week you drive into the zone.
5
Enter your current vehicle value and upgrade cost.
6
We check compliance against each zone's rules.
7
We calculate weekly, monthly, annual and 5-year charges.
8
Press Calculate to see recommendation: upgrade, borderline, or pay daily.

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Complete Guide: UK Clean Air Zones & ULEZ

How the 14 UK Clean Air Zones work, what Euro standards you need, and when upgrading pays back vs paying daily.

📅 Last updated: April 2026

Quick Tips

Jump-start your understanding with these essential tips

gov.uk/check-ulez uses DVLA data — the definitive source. Third-party apps and "compliance checkers" can be out of date for zones that tighten rules.

Scottish LEZs don't offer a pay-daily option. Non-compliant vehicles get a £60 PCN per infraction, doubling for repeat offences in 90 days up to £480.

Bradford (Mon–Sat 7am–7pm) and Tyneside (Mon–Sun 7am–7pm) don't charge overnight. Most other zones run 24/7.

CAZ/ULEZ is a daily charge — you pay once per day regardless of how many times you enter and exit. Keep the same-day return cheap.

TfL auto-pay is free and avoids the £180 PCN risk from forgetting. Register your vehicles once; charges auto-debit weekly.

Step-by-Step Guide

Follow these steps to get the most from this tool

Which cities do you regularly drive into? Each has its own rules, charge and exemptions. Run the calculator once per zone if you travel to multiple.

Check your V5C "Emissions Class" field, or enter your reg at gov.uk/check-ulez. For cars older than ~10 years, also check the MOT history for any modifications that affect compliance.

A "day in the zone" = any calendar day your vehicle is in the zone during charging hours. Park outside + public transport = zero charges. Drive in one day = one charge regardless of trips.

Use We Buy Any Car or Motorway for a trade-in value. Non-compliant used cars are worth 20–40% less than their clean-air equivalents because the market prices in future CAZ costs.

A compliant used car starts around £7,000–£12,000 for sensible choices (Euro 6 diesel 2017+, Euro 4 petrol 2010+, or any EV). Subtract any scrappage grant (London £2,000) from your upgrade cost.

Payback = net upgrade cost ÷ annual CAZ cost. <2 years = strong buy. 2–4 years = depends on holding period. >4 years = pay daily and keep the car.

Zones periodically tighten rules. Oxford's ZEZ already excludes most compliant diesels. Greater Manchester's CAZ is paused but could restart. Your "compliant today" car could become non-compliant in 3–5 years.

Advanced Topics

Deep dives for advanced users

Euro 4 petrol: registered Jan 2006+. Euro 5 diesel: registered Sep 2009+. Euro 6 diesel: registered Sep 2015+. Exceptions exist — particularly imported cars, taxi-spec vehicles, and some fleet models certified earlier than mass market. The V5C always takes precedence.

Scottish LEZs were designed under Transport (Scotland) Act 2019 with pure penalty enforcement. Policy intent: eliminate non-compliant vehicles from city centres, not monetise them. The £60 PCN (doubling for repeats) effectively bans non-compliant vehicles rather than taxing them.

TfL has committed ~£160m to ULEZ scrappage since 2019, paying £2,000 (cars) / £1,000 (motorcycles) for compliant replacements. Birmingham, Bath and Bristol ran similar schemes that have mostly closed. Check your local authority's current scheme — grants can cut net upgrade cost by 20–40%.

CAZ (Clean Air Zone) is the England framework with 4 class tiers (A–D) covering buses, taxis, LGVs, HGVs and cars. ULEZ is specifically London's 24/7 zone. LEZ (Low Emission Zone) is Scotland's equivalent. ZEZ (Zero Emission Zone) requires fully zero-emission vehicles (Oxford is the UK's first ZEZ).

If you're weighing an EV upgrade, run the Salary Sacrifice EV Net Cost Calculator to compare salary-sacrifice vs cash purchase. Check home-charging costs with the Home EV Charging Cost Calculator. For the full commute picture, see the Hidden Costs of Commuting Calculator.