You run a 15-van plumbing operation out of Harrow. Seven of your vans are 2014-2016 Transits — good mechanical condition, low finance, about £6,000-£8,000 trade value each. Seven drivers are in and out of Central London three to four days a week for boiler jobs. The ULEZ expanded to cover the whole of Greater London in August 2023. Your office sits just inside the zone.

The question is not "what is ULEZ". Every fleet blog describes the zone. The question is: do you pay the daily charge, upgrade the vans now, wait for scrappage, or stop taking Central London jobs? The answer depends on numbers most operators never sit down and work out.

Here is the real maths, and the same framework applied to Birmingham, Bristol, Bath, Sheffield and Bradford CAZ.

The London ULEZ maths for a 15-van SMB

The ULEZ charge is £12.50 per non-compliant vehicle per day inside the zone. The rule of thumb: any diesel van registered before September 2016 is almost certainly Euro 5 or earlier and will pay. Petrol vans need to be Euro 4 (roughly 2006 onwards) to escape. Check the plate on the TfL vehicle checker before you assume.

For a van entering the zone 3 days a week, 48 working weeks a year:

  • £12.50 × 3 days × 48 weeks = £1,800 per van per year
  • Seven non-compliant vans in Zone 3-4 days a week = £12,600 to £16,800 a year

Four years of charges = roughly £60,000. That is more than the cost of replacing the seven vans with compliant used Euro 6 Transits (roughly £12,000-£14,000 a van at 2026 used prices, or £84,000-£98,000 across the seven).

But this ignores three things most fleet managers miss:

  1. Your old vans have trade value. Seven Transits at £6,500 trade average = £45,500 recovered. Net upgrade cost is closer to £40,000-£55,000 — not £98,000.
  2. Finance cost. £50,000 on a 4-year fleet HP at 9% APR is roughly £1,250/month, or £15,000/year. Still less than the ULEZ total, but not by much in year one.
  3. Risk of missed charges. A driver forgets to register a new Auto Pay vehicle and you pick up a £180 penalty (£90 if paid within 14 days). Across 15 drivers over 4 years, 10-20 penalty events is realistic. Budget £1,500-£3,000.

The honest conclusion for a 15-van fleet doing regular Zone work: upgrade is cheaper within 3 years. Pay-and-drive only makes sense if your exposure is fewer than 2 days per van per week, or you are within 18 months of replacement anyway.

Scrappage — useful, not transformational

TfL runs a scrappage scheme for vans and minibuses used for business. As of early 2026 the top grants are £7,000 for scrapping a non-compliant van (or £9,500 to retrofit, though retrofit technology for light vans is limited in practice). Check the current rates and eligibility on the TfL scrappage page — the pot is finite and the terms change.

Reality check: £7,000 grant is useful, but the condition is you scrap the vehicle (disposal only, no resale). If your old van is still worth £6,500 at trade, you are swapping a £6,500 trade-in for a £7,000 grant. Net benefit: £500 per van. That is not transformational on a 15-van fleet.

Scrappage makes sense when your van has failed MOT, the repair bill exceeds trade value, or it is worth less than £3,000 on the open market. Otherwise, sell it out of zone and buy compliant.

What to tell your drivers when the zone expands

The August 2023 London expansion caught fleets that had been comfortable in outer boroughs for years. The next expansion to watch: nothing formal announced for London by early 2026, but Birmingham, Bristol and Sheffield have all reviewed their boundaries in the last 18 months. Bath extended its CAZ boundaries in 2024. Assume every active zone will expand once.

The conversation with drivers is simple and concrete:

  • "Your van is/is not compliant. Here is the sticker on the windscreen." Make it visible.
  • "If you are routed through the zone and your van is not compliant, the company pays. Not you."
  • "If you drive into the zone in a personal vehicle for a work run (tools in the boot), you are still liable. Never do this."
  • "Auto Pay is registered for every compliant and non-compliant van. If you swap vans for the day, tell the office first."

Write this on a single A4 and put it in every van. Drivers will not read a 12-page policy document, but they will read a laminated sheet in the cab.

Birmingham, Bristol, Bath, Sheffield, Bradford — what differs

The government manages CAZ rules centrally, but each city sets its own vehicle classes and charge levels. The national portal for paying any CAZ is on gov.uk, and the technical framework is published by Defra.

The differences that matter for an SMB fleet:

  • Birmingham — Class D (cars + vans + HGVs + taxis). £8 a day for non-compliant vans. Zone covers inside the A4540 Middleway. Plumbers and electricians on call-outs into the city centre get caught daily.
  • Bristol — Class D. £9 a day for vans. Covers central Bristol inside the inner ring road. Confusing boundary — check the Bristol CAZ map before you commit.
  • Bath — Class C only (commercial vehicles, no private cars). £9 a day for vans. Smaller zone than Bristol, but hits any fleet servicing central Bath properties.
  • Sheffield — Class C. £10 a day for vans. Inside the inner ring road. Launched 2023.
  • Bradford — Class C+taxi. £9 a day for vans. Wider than most people expect — covers a large area of the city, not just the centre.

None of the outer cities match London for size or charge, but for a regional fleet operating 8 vans through Birmingham or Sheffield 4 days a week, the charge is £8 × 4 × 48 = £1,536 per van per year, or £12,288 across 8 vans. Same logic as London — upgrade pays back in 3-4 years.

The checklist before you decide

  1. Run every van's plate through the TfL checker and the relevant city CAZ checker. Write down which are compliant.
  2. Pull 3 months of driver route data. How many zone entries per van per week on average?
  3. Multiply: entries × weeks × charge = annual liability per van.
  4. Get 3 used-van quotes for Euro 6 replacements — local dealers, auction, and a national van specialist. The spread is wide.
  5. Get trade-in quotes for the old vans from the same sources. Auctions often beat part-ex for clean older Transits.
  6. If the upgrade pays back in under 3 years, upgrade. If 3-5 years, calculate finance cost and decide. Over 5 years, pay the charge until natural replacement.

When pay-and-drive is actually the right answer

If your fleet only enters the zone occasionally — one van doing a weekly site visit, a director's estate car for meetings — Auto Pay is fine. The admin cost of upgrading a low-use vehicle outweighs the charge. Be honest about your real utilisation before triggering a five-figure replacement programme.

Sources & further reading

Related Mekavo articles: Fleet MOT scheduling for SMB operators, Driver licence checking with DVLA, Spotting fuel card fraud in your data, Electric fleet TCO for a 20-van SMB in 2026.

Why we care

Mekavo Fleet is the lightweight fleet manager for 10-50 vehicle operators — plumbers, electricians, couriers, mobile servicing. We track MOT dates, driver licences, fuel receipts, vehicle documents and the compliance paperwork that matters, without the enterprise price tag of Webfleet or Samsara. If you are running a spreadsheet today and a ULEZ penalty just landed on the doormat, that is the gap we fill.

Note on scenarios: The shops, names, addresses, and case reference numbers in this article are fictional and used solely to illustrate how the cited statutes operate in practice. Any resemblance to actual shops, owners, or events is coincidental. The statutes, regulations, and agency procedures cited are real and current as of publication.