When your car fails an MOT, the station does not automatically get to charge you a full test fee a second time. There are rules. Most drivers don’t know them. Some garages, quietly, rely on that.
This guide covers what you’re actually entitled to, how the retest fee structure works, and the situations where a garage is within its rights to charge you the full £54.85 — so you can tell which is which.
The two retest categories
The DVSA distinguishes between two types of retest, and the fee depends on which one applies to you.
Partial retest — only the failed items are checked again. The rest of the car is not re-examined. This applies when:
- You return to the same test centre that conducted the original test
- You return within 10 working days of the original test date
- The vehicle has been repaired but not significantly altered
The partial retest fee is lower than a full test fee. For cars, it is currently £27.35 if the test centre agrees to carry it out at a reduced rate. Some centres charge nothing at all — more on that below.
Full retest — the entire MOT test is repeated from scratch. This applies when:
- You go to a different test centre from the one that failed you
- You miss the 10-working-day window
- The nature of the repair has changed the vehicle in a way that makes a full assessment necessary
A full retest at any station is capped by the same maximum fee as the original test: £54.85 for a private car. Stations can charge less; they cannot legally charge more.
The same-day free retest
This is the one most drivers miss.
If your car fails on certain defects and you return to the same station on the same day, the partial retest is free. No charge. The tester re-checks the failed items with no additional fee.
This applies specifically to defects that can be repaired quickly and straightforwardly — typically:
- Lamps and bulbs (headlamps, brake lights, indicators)
- Screen wash (empty reservoir)
- Wiper blades (easy replacement)
- Some minor brake defects where the component is straightforward to swap
The underlying logic: the car is already there, the tester is familiar with it, and a few minutes to re-check a replaced bulb costs the centre very little. DVSA has structured the fee rules to reflect this.
The catch is that “same day” means the testing slot has to exist. A small MOT centre with a full diary may not be able to fit you back in before closing. That’s not misconduct — it’s scheduling. If they genuinely can’t do a same-day re-check, the 10-working-day partial retest window opens up, and the part fee applies.
What counts as 10 working days
Working days are Monday to Friday, excluding bank holidays. A test on a Friday afternoon gives you until the second Friday of the following fortnight, skipping any bank holidays in between. That’s a decent window, but don’t assume you have longer than you do — and don’t mistake calendar days for working days.
DVSA guidance on retests is published as part of the MOT testing guide at gov.uk/guidance/mot-testing-guide. The specific rules on fees and partial retests are in the fee schedule sections.
After 10 working days, the partial retest entitlement lapses. You’re starting from scratch, paying the full fee, at whichever station you choose.
Where stations get it wrong (or pretend to)
Some stations charge a full retest fee when a partial retest applies. This is technically a breach of the fee regulations, but it’s rarely challenged because most customers don’t know the rules.
The situations where this tends to happen:
“We need to check the whole car again” — For a partial retest, they don’t. The regulations only require re-checking the defects listed on the VT30 failure notice. If a tester is claiming the whole vehicle needs re-assessment for a replaced headlamp bulb, they’re wrong.
Applying the full fee to a 10-working-day partial retest — Some stations set their own pricing and assume the customer won’t push back. If you’re within the window and returning to the same centre, the partial retest fee structure applies. Ask before the retest starts what the charge will be. If it’s the full £54.85, ask why a partial rate doesn’t apply.
Refusing the partial retest to force a rebooking — A station can legitimately say it doesn’t have availability today, but it cannot refuse a partial retest entirely within the 10-working-day window if the car has been repaired and the conditions are met.
None of this is worth getting into a lengthy dispute over at the garage forecourt. If you believe you’ve been overcharged, pay under protest, note it, and raise it with DVSA via their customer complaints route. Refusing to pay and taking the car is worse for you.
Checking the VT30 before repairs
The VT30 is the failure notice — the sheet the tester produces listing every defect, categorised as Major, Dangerous, or Advisory. You are entitled to this document. Take it before you authorise any repairs.
It matters for retests because the partial retest only covers items on the VT30. If a station tries to add items that weren’t on the original failure notice to the retest, they’re conducting a more extensive assessment than the regulations require. You’d need to agree to that and potentially pay differently.
It also matters for a practical reason: if you take the car elsewhere for the repairs, the repairing garage needs to know what was actually failed. The VT30 is the reference document. Don’t rely on the MOT station’s verbal summary.
If you’re going to a different station anyway
Sometimes you’d rather not go back to the station that failed you. That’s your right. A different station means a full retest, full fee, no partial entitlement — but you’re also getting an independent view of the car.
If the first station’s failure looked unusual or you want a second opinion before committing to expensive repairs, taking the car to a different station within 10 days is a reasonable move. You’ll pay £54.85, but if the second tester only confirms two of the five listed defects, you’ve saved yourself money on unnecessary work. See our guide on getting a second opinion for how to approach that decision.
For the full current MOT fee structure, including how stations set their prices and where the caps sit, that guide covers the detail.
Booking the retest
Most stations let you book a retest by phone. When you call, confirm:
- The retest will cover only the VT30 items (partial, not full)
- The fee that will apply
- That they have availability within your 10-working-day window
Get a name if you’re in any doubt. A verbal confirmation isn’t legally binding, but it’s useful if there’s a dispute about the fee when you arrive.
If the repairs were done at a different garage, bring a receipt showing the work was completed. The tester may want to confirm what was changed. It’s not always required, but having the documentation removes ambiguity.
The items that don’t qualify for partial retest
Not every repair qualifies for a same-day free re-check. Items that require substantive mechanical assessment — brake performance measurements, emissions testing, structural checks — can’t be re-checked in a couple of minutes and won’t qualify for the same-day free slot. They fall under the partial retest fee within 10 working days, or a full retest if you’ve passed the window.
If you’re unsure whether your specific failure qualifies for the same-day free or the 10-day partial, ask the station directly before you leave with the failed car. They should be able to tell you which category the defect falls into.
One thing to do before you drive away with a failure notice
Ask, while you’re still at the counter: “Does this qualify for a same-day free retest if I get it repaired today?” A straight question, before you’ve left the premises. If it does, you’ve saved yourself a fee. If it doesn’t, you know exactly what you’re dealing with.
The retest rules exist to stop drivers being double-charged for the same administrative exercise. They work, when you know to use them. To understand the full appeals process if you believe the failure itself was wrong, the DVSA formal appeal route is covered in detail here. And if you want to understand whether the station’s cost structure is typical for your area, our MOT centre finder shows local stations and pricing. To check a vehicle’s MOT history before a purchase or to understand what past testers have flagged, that tool is free.