An MOT retest can be free if you leave your car at the test centre for repair, or return by the end of the next working day for specific minor faults. Otherwise, it costs up to half the full MOT fee, as long as you return to the same garage within 10 working days.
It's a feeling every driver dreads: the phone call from the garage with the words, "I'm afraid your car has failed its MOT." Your first thought is usually about the repair bill, but the second is often, "How much is this going to cost me just to get it tested again?" It’s a perfectly reasonable question, and one surrounded by a lot of confusion and myths. Many people think a retest is always free, while others assume you have to pay for a full test all over again. The truth, as with most things MOT-related, lies somewhere in the middle and is governed by clear rules set by the Driver and Vehicle Standards Agency (DVSA). Understanding these rules is key to avoiding unnecessary costs and stress. As an MOT tester with over two decades of experience, I've seen countless drivers caught out by misunderstandings about retest fees. The system is actually designed to be fair, giving you a chance to get things fixed without being penalised, but you need to know how it works. Getting it wrong can mean the difference between a free check and paying for a whole new MOT. This guide will walk you through the official DVSA regulations in plain English. We'll cover when a retest should be free, when you should expect to pay a partial fee, and the scenarios where you'll unfortunately have to pay for a full test again. Knowing your rights and options puts you in control of the situation and helps you make the best decision for your wallet and your vehicle.
Official Rules: The 'Partial Retest' and Costs
The rules for retest fees are laid out clearly by the DVSA in the 'MOT Testing guide for test stations'. The core principle is that you shouldn't have to pay for a full test twice if you get your car repaired promptly. This is where the concept of a 'partial retest' comes in. When your vehicle fails its MOT, you have a window of **10 working days** to have the faults rectified and get the vehicle re-inspected. If you bring the car back to the *same* testing station within this 10-day window, the tester does not need to perform a full MOT again. Instead, they conduct a partial retest, where they only check the items that the vehicle failed on previously. This saves a significant amount of time and effort, and the fee reflects that. According to the DVSA, the maximum a test station can charge for a partial retest is half of the maximum legal MOT fee for that vehicle class. For a standard Class 4 car, the maximum MOT fee is £54.85, so the maximum partial retest fee is **£27.42**. A test centre is free to charge less than this, or even waive the fee as a gesture of goodwill, but they are not obligated to. The fee covers the examiner's time to re-examine the vehicle, check that the repairs meet the required standard, and log the new 'pass' result on the central DVSA database. It's important to remember this 10-working-day timeframe is strict. If you return on the 11th working day, the original failure certificate (the VT30) expires for retest purposes, and you will need a complete, brand-new MOT at the full price. The clock starts from the day of the failure, and does not include weekends or public holidays.
When Is an MOT Retest Completely Free?
This is the question everyone wants the answer to. Yes, an MOT retest can be completely free of charge, but only under two specific circumstances. It's crucial to understand which one applies to you. **1. Leaving the Vehicle at the Test Station for Repair** This is the most straightforward scenario. If your car fails the MOT and you agree to leave it at the testing station to have the necessary repairs carried out by them, the subsequent retest is free. This applies regardless of what it failed on. The re-inspection must still happen within the 10-working-day window. This is a common situation; we'll carry out the MOT, identify the faults, provide you with a quote for the repairs, and if you give us the go-ahead, we fix it and then complete the retest to issue the pass certificate. Because the car never left our premises, the DVSA considers this part of the same testing event, so no retest fee is applicable. **2. The 'One Working Day' Rule for Minor Faults** This is the one that often causes confusion. You can get a free retest even if you take the car away, but there are strict conditions. You must bring the vehicle back to the same test station **before the end of the next working day**, and it must have failed on one or more of a specific list of items. As per the DVSA's guide (Section I.3), these items are things that a tester can check quickly and easily without specialist equipment. The list includes: * Bonnet/boot lid * Brake pedal rubber * Direction indicators and hazard lamps * Doors * Fuel filler cap * Horn * Lamps (but not headlight aim) * Loading door * Mirrors * Registration plates * Seatbelts (but not anchorages or structure) * Seats * Sharp edges or projections * Steering wheel * Tailgate * Tyres (but not tread depth or pressure) * Vehicle Identification Number (VIN) * Windscreen and glass * Wipers and washers For example, if you fail on a blown headlight bulb, a cracked mirror, or worn-out wiper blades, you can take the car, fix it yourself, and retu
When Do You Have to Pay for a Retest?
While everyone hopes for a free retest, there are common situations where a fee is payable. Understanding these scenarios will help you budget accordingly after an MOT failure. **1. Paying the Partial Retest Fee** This is the most common paid scenario. You will have to pay the partial retest fee (up to £27.42 for a car) if: * You take the vehicle away for repairs. * The failure items are **not** on the specific 'free retest' list (e.g., brakes, steering, suspension, emissions, corrosion, headlight aim). * You return the vehicle to the *same* test station within the 10-working-day window. This is a fair compromise. It allows you the freedom to have the car repaired by a garage of your choice, or even do the work yourself if you're competent, without having to pay for a full test again. The fee reflects that the tester still needs to allocate time—sometimes using a ramp and specialist equipment like a brake roller or headlamp aligner—to verify the repairs are up to standard. For example, if you fail on brake performance, you might take it to your specialist mechanic. After they've replaced the pads and discs, you bring it back to us. We'll put it on the brake rollers to check the performance is now within limits and, if so, we'll pass it and charge the partial retest fee. **2. Paying for a Full, New MOT** Sometimes, you have no choice but to pay for a brand new MOT at the full price. This will happen if: * You bring the vehicle back for its retest **after** the 10-working-day window has expired. At this point, the system automatically requires a full test. * You decide to take the vehicle to a **different** test station for the retest. The partial retest arrangement is only valid at the original test station that conducted the failure. A new garage has no record of the initial test other than the failure certificate and must conduct its own full inspection from scratch. This is why it's so important to act quickly after a failure. A delay of just one day beyond the 10
Smart Ways to Avoid Retest Fees
Frankly, the best way to avoid a retest fee is to pass your MOT the first time! As a tester, I'd much rather give you a pass certificate straight away. It's less paperwork for me and less stress for you. A surprising number of MOT failures are for simple, inexpensive things that a driver could have checked and fixed themselves in just a few minutes. Before you bring your car in, take ten minutes to do a 'pre-MOT check'. This isn't about being a mechanic; it's about spotting the obvious issues. Go through this simple list: * **Lights:** Ask a friend to help you check every single light. Headlights (main and dipped beam), side lights, indicators, hazards, brake lights, reversing lights, and even the number plate lamps. A blown bulb is one of the most common failures. * **Tyres:** Check the tread depth. The legal minimum is 1.6mm, but it’s best to have more. A quick way to check is the 20p test – if you can see the outer band on the coin when you place it in the tread, it's likely too low. Also, check for any obvious cuts or bulges on the tyre walls and make sure the pressures are correct. * **Wipers & Washers:** Make sure your wiper blades are not torn or perished. Test them – do they clear the screen effectively? Crucially, make sure your washer bottle is topped up with fluid. An empty bottle is an instant fail. * **View of the Road:** Check your windscreen for any chips or cracks. A chip larger than 10mm in the driver's central view (the 'A-zone') is a fail. Also, remove any air fresheners or phone cradles obstructing this view. * **General Checks:** Honk the horn, check all seatbelts engage and retract properly, and ensure your registration plates are clean, legible, and not cracked or broken. Clear your car of clutter, especially in the boot, so we can access everything we need to. These simple checks address a huge percentage of MOT failures and could save you the cost, time, and inconvenience of a retest.
What Happens if You Do Fail
Okay, so despite your best efforts, the car has failed. Don't panic. Here’s exactly what happens next and what your options are. Immediately after the test, the examiner will give you a VT30 'Refusal of an MOT Test Certificate'. This document lists every reason the vehicle failed, categorised as either 'Major' or 'Dangerous'. It will also list any 'Advisories' – items that are wearing but not yet severe enough to cause a failure. Your next step is to get the failure items repaired. You have the 10-working-day window to do this and qualify for a partial retest at the original test station. Your legal right to drive the vehicle depends on two things: the status of your old MOT and the nature of the new defects. * **If your old MOT certificate is still valid** (i.e., you had the test done early) and the new failure is 'Major', you can legally drive the car, but only to a pre-booked appointment for repair or to the retest itself. You cannot use it for normal journeys like shopping or commuting. * **If your old MOT has expired**, the same rules apply: you can only drive it to get the faults fixed or to the retest. * **If the failure is marked 'Dangerous'**, the rules are much stricter. A dangerous defect means the vehicle is a direct and immediate risk to road safety. In this situation, the DVSA and the law are clear: you should NOT drive the car at all. You would need to have it recovered from the test station to a place of repair. Once repaired, contact the original test station to arrange the retest. They will check the repairs, and if everything is satisfactory, they will update the online system and issue you with a fresh VT20 Pass Certificate, valid for one year from the original test date.
Can I legally drive my car if it fails the MOT? — It depends. If your previous MOT certificate is still in date and there were no 'dangerous' defects found, you can drive your car to a garage for repair or to a pre-booked retest appointment. You cannot use it for general journeys. If the fail was for a 'dangerous' item, you must not drive the car at all. If your old MOT has expired, you can only drive to a place of repair or the retest. Driving a failed vehicle illegally can lead to fines and points on your licence.
Is the partial retest fee always exactly half price? — No, the 'half price' figure is the *maximum* a test station is allowed to charge by law. For a Class 4 car, this is £27.42. A garage can choose to charge less, or even waive the fee entirely, perhaps as a gesture of goodwill if you're a regular customer. However, you should not expect this. The fee is a legitimate charge for the examiner's time and the use of equipment, so most garages will charge it. Always ask upfront what their retest fee will be.
What's the difference between a 'Major' and a 'Dangerous' MOT fail? — Both are failures, but they differ in severity. A 'Major' defect, like a worn steering joint, means the vehicle is unroadworthy and the fault must be repaired immediately. A 'Dangerous' defect, such as a brake disc about to fail, means the vehicle poses a direct and immediate risk to you and other road users. A car with a Major fail can be driven to a garage for repair; a car with a Dangerous fail must not be driven at all and should be recovered.
Do I have to get the repairs done at the same garage that did the MOT? — Absolutely not. You have the right to take your car to any garage you choose for the repair work, or even fix it yourself if you have the skills. The MOT test station and the repair workshop are separate functions, even if they're in the same building. Once the car is repaired, you can then take it back to the original test station for the partial retest. This gives you the freedom to shop around for the best price or use a mechanic you trust.