It is a Monday in October in Leicester. You run a 22-van mobile-servicing fleet. Two vans — a 2019 Transit Custom and a 2020 Vivaro — both come up for MOT in the same week because they were bought together in a fleet order three years ago. Your local commercial MOT station is booked out for 10 days. You take a slot at a garage 40 minutes away. The Vivaro fails on a damaged prop shaft and the part is on 5-day backorder. The van is off the road for 9 working days. One of your customers, a letting agency doing boiler checks, drops you for being unreliable. Cost of the episode: £1,800 in subcontracted cover and a £30,000/year contract gone.

This is the MOT-scheduling disaster that happens to SMB fleets every autumn. The fix is not a £300-a-month fleet management system. The fix is knowing what the bigger operators do, copying it, and avoiding the three specific traps.

How small fleets actually manage MOT today — the disasters

Before the fix, the reality. Most 10-40 vehicle fleets rely on one of four systems, in rough order of popularity:

  1. A spreadsheet the office manager updates when they remember. Works for 5 vans. Breaks silently above 15.
  2. The DVSA reminder emails or paper letters — if they registered for them, which most did not. Goes to a shared inbox nobody owns.
  3. The driver is trusted to flag it. A driver who has been with you 3 years will. A new driver will not. A driver who has just resigned definitely will not.
  4. The MOT certificate on the windscreen. Only works if someone looks at it.

All four share the same fault: they are reactive. The first time anyone notices is when the date is uncomfortably close. By then every MOT slot in the area is gone.

The 42-day rule that SMB fleets rarely use

Here is the first free lever. You can MOT a vehicle up to 1 calendar month minus 1 day before the current certificate expires, and the new certificate still starts from the old expiry date. In practice: if your van's MOT expires on 15 October, you can test it from 16 September onwards and still get a full new certificate running to 15 October next year. You do not lose a day.

For SMB fleets this is the single biggest scheduling tool and most operators do not use it. Instead of everyone fighting for the last week of October, you book your October expiries for the third week of September. Garages are quieter, slots are available, retests are achievable. Details on gov.uk here.

The second rule: if a vehicle fails MOT with dangerous defects it is immediately off the road. If it fails with major defects, and the current MOT is still valid, it can legally be driven until the existing certificate expires — but insurers do not like this and your duty of care is weakened. Treat any fail as off-road.

The DVLA MOT history API — free, and nobody uses it

The DVLA API portal provides a free MOT History API. You register, get a key, and can look up MOT history by registration number programmatically. For a fleet of 22 vans, a simple script that pulls every vehicle's MOT status once a week and emails a summary to the office solves 80% of the scheduling problem.

The public MOT history page at gov.uk/check-mot-history shows the same data in a browser, which is the backup when someone is away or the script is not built yet.

If you use a fleet tool that does this for you, fine. If you do not, a junior with basic Excel or Google Sheets skills can pull the API into a spreadsheet in an afternoon.

The scheduling calendar every SMB fleet should have

The rule: no week should have more than 10% of your fleet hitting MOT. For a 20-van fleet that is 2 vans per week maximum. For 40 vans, 4 per week maximum.

The way to get there:

  1. List every van with its MOT expiry date in a spreadsheet. One row per van.
  2. Count vans expiring each calendar week of the year.
  3. For any week with more than your 10% threshold, move the earlier-booked vans back using the 42-day rule. You sacrifice a few days of certificate on the first rotation, then permanently the fleet is balanced.
  4. Repeat the smoothing every time you buy a new batch of vans together. Never let a fleet order land on the same MOT week.

Done once, this takes 2 hours. It avoids almost every "two vans on the same week" disaster for the life of the fleet.

The booking rhythm

Once the calendar is balanced:

  • 8 weeks out — office manager confirms the van is still on the fleet and not on long-term hire to a customer.
  • 6 weeks out — MOT slot booked at your primary garage for the 42-day window. Always the first slot of the day — if it fails, there is time to retest the same day.
  • 4 weeks out — van booked for a pre-MOT safety inspection. This is the single highest-value hour of mechanic time in the fleet calendar. Tyres, brake pads, suspension bushes, wipers, headlamp aim, emissions check. Fix anything that will fail. Target: zero MOT fails from discretionary items.
  • The test week — driver briefed, van valeted, no ladder or tools on the roof rack (some testers refuse to test loaded vans).

Your first-pass rate will go from ~70% (industry average for older commercial vehicles) to 90%+. A fail costs £60-£100 in retest fees plus 3-7 days downtime. On a 22-van fleet that is £1,500-£3,000/year saved on retests alone, before counting downtime.

What to do when two vans hit the same week anyway

Sometimes you inherit a fleet, or a scheduling change forces two vans into the same week. The playbook:

  1. Split the bookings across two garages. Primary and backup. Identify your backup garage BEFORE you need it.
  2. Book Tuesday-Thursday, never Friday. A Friday fail plus weekend gives you 3 days of downtime before repair starts. A Tuesday fail lets you retest Wednesday or Thursday.
  3. Never book both vans in the morning at the same garage. If both fail, you lose two vans for one day. Morning + afternoon at the same garage is fine.
  4. Have a subcontractor plan ready. Who can you call tomorrow morning for a van? Know the name, number, day rate. £200-£300/day is typical. £400+ is panic-hire and probably indicates you did not plan.

The retest rule nobody reads

If your van fails MOT and you retest at the same test station within 10 working days, most stations do a partial retest for a reduced fee (the exact fees are regulated by DVSA — see the DVSA MOT inspection manual and the fee schedule on gov.uk). Retest at a different station and you pay full fee again. Always retest where you failed.

The SMB MOT checklist

  1. Spreadsheet every van and its MOT expiry. Today.
  2. Count vans per week. Smooth so no week has more than 10%.
  3. Register for DVSA reminder emails on every vehicle. Shared inbox, one owner.
  4. Pick a primary MOT garage and a backup. Tell them you are a fleet and book in advance.
  5. Book every MOT 6 weeks out, in the 42-day early window, never Fridays.
  6. Pre-MOT inspect every van 4 weeks out. Fix discretionary items.
  7. Know your subcontractor plan before you need it.

Sources & further reading

Related Mekavo articles: ULEZ and CAZ compliance for small fleets, 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 built for the 10-50 vehicle operator who is not ready for Webfleet or Samsara pricing. We pull every van's MOT expiry into one view, remind the right person 8, 6 and 4 weeks out, and keep the pre-MOT inspection record attached to the vehicle so you have an audit trail if a regulator or insurer ever asks. It is the spreadsheet that does not break at 15 vans.

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.