How Does an MOT Retest Work? Costs, Deadlines, and Free Retests

A failed MOT does not automatically mean paying for a whole new test. If you return the vehicle to the same testing station within 10 working days, the retest is capped at half the standard MOT fee, which works out to about £27.43 for a car. If the failure was limited to certain eligible items and you get the vehicle back by the end of the next working day, the retest is free. Miss the 10-day window, or take the car to a different station, and you pay for a full test at up to £54.85. That is the shape of MOT retest cost and timeframe rules; the detail below tells you which category your situation falls into.

The Deadlines That Decide What You Pay

The clock starts on the day of the original test. Three deadlines matter, and they stack.

The tightest is the end of the next working day. If your vehicle failed only on items from a specific eligible list (covered below) and you can get it repaired and back to the same test centre before that station closes the following working day, the retest costs nothing.

The next is 10 working days from the original test. Return the vehicle to the same station within that window and the station can only charge up to half the statutory maximum test fee for a partial retest. Working days exclude weekends and bank holidays, so this usually gives you around two calendar weeks.¹

After 10 working days, the partial retest option is gone. Whether you return to the original station or go somewhere else, the vehicle needs a full MOT at the standard rate.

There is one other free option worth knowing. If you leave the vehicle at the test centre for repairs and it never leaves the premises, the retest is also free, provided it happens before the end of the 10th working day.²

What Each Retest Actually Costs

For a standard car, the statutory maximum for a full MOT is £54.85.³ Retest fees flow from that figure.

A free retest costs nothing. This applies when the car stays on-site for repair and retest inside 10 working days, or when the failure was on eligible items only and the vehicle comes back by close of business the next working day.

A partial retest is capped at half the statutory maximum. For a car that ceiling is roughly £27.43. The cap is a maximum, not a set price, and many stations charge less, so it is worth asking upfront.²

A full test at up to £54.85 applies whenever the partial retest rules do not: 10 working days have passed, or you have moved to a different test centre. A new station has no record of what the first inspection found and starts from scratch.

Which Failures Qualify for a Free Next-Working-Day Retest

The free next-working-day retest only applies if every major or dangerous fault on your failure notice is on the eligible list. One qualifying item plus one non-qualifying item, and you fall back to the partial retest fee. The eligible items are:

Lamps and lighting: headlamp levelling devices, main beam tell-tale, rear reflectors, and all other lamps except headlamp aim
Windscreen glass, wipers, and washers, and mirrors
Doors, hinges, catches, pillars, bonnet, boot lid, tailgate, and loading doors
Wheels, tyres, and tyre pressure monitoring systems (this exception does not apply to motorcycles)
Seatbelts (but not the anchorages), load limiters, pre-tensioners, and seats
Horn, steering wheel, battery, registration plates, electrical wiring, fuel filler cap, brake pedal anti-slip, vehicle identification number, and sharp edges or projections

If your list of failures sits entirely inside that list and the repairs are quick, getting the car back the next working day saves you the partial fee entirely.¹

Can You Drive the Car Between the Test and the Retest?

This depends on two things: how the fault was classified, and whether your previous MOT certificate is still valid.

Faults are recorded as minor, major, or dangerous. Minor faults do not fail the vehicle. Major faults cause a failure but do not automatically ground the car. Dangerous faults fail the vehicle and mean it cannot legally be driven at all until the repair is done.⁴

If your vehicle failed on major faults only and your previous MOT is still in date, you can drive it away from the test centre. The car still has to be roadworthy in its own right, so a fault you know about could still get you stopped.

If your previous MOT has already expired, driving is limited to a pre-booked test appointment or a journey directly to a garage for the specific repairs that caused the failure. Anything else is illegal, and driving without a valid MOT can bring a fine of up to £1,000. A dangerous-classified vehicle can attract a fine of up to £2,500 and three penalty points.¹

What the Retest Examiner Checks

When your vehicle fails, the station issues a VT30 form, formally the Refusal of an MOT Test Certificate. It lists every defect and its classification.⁵ Treat this document as the repair brief for whoever fixes the car.

A partial retest is focused, not a second full inspection. The examiner rechecks only the items marked major or dangerous on the VT30. That is why the fee is capped at half and why the appointment is quicker.¹

Every major and dangerous item has to meet the inspection manual standard. A repair that is nearly right, a tyre just below the tread limit, brake performance that falls short of tolerance, will fail again on the retest. Making sure the mechanic works from the VT30 rather than a rough description is the single easiest way to avoid paying twice.

Once every failure item passes, the examiner issues a VT20 pass certificate and updates the DVSA’s central database. Police cameras and roadside checks read that database in real time, so the car’s legal status changes the moment the record is finalised.¹

Booking Early Protects Your Renewal Date

You can present a vehicle for MOT up to one month minus a day before the current certificate expires and keep the same annual renewal date. So if your MOT runs out on 15 May, a test on or after 16 April preserves that 15 May anniversary.⁶

A failure can spoil that alignment. If repairs and the retest push the pass date past the old expiry, the new certificate runs from the retest pass, not from the original anniversary. You lose the clean 12-month cycle and, more importantly, you may be left with a vehicle you cannot legally drive during the gap. Booking the initial test early in the one-month window gives you room for a failure, a repair, and a retest without running out of certificate.

1
GOV.UK. Getting an MOT: Retest After a Repair
2
GOV.UK. MOT Testing Guide for Test Stations – L. Accounts and Fees
3
GOV.UK. Getting an MOT: MOT Costs
4
GOV.UK. Getting an MOT: MOT Test Result
5
RAC. MOT Retest: Time Limits, Costs, and the MOT Retest Process
6
GOV.UK. Getting an MOT