The 15-Minor Rule: How It Works

The practical driving test has a clear, simple rule when it comes to minor faults (officially called "driving faults"): you can accumulate up to 15 minor faults and still pass. If you get 16 or more minors, you fail — even if none of them were serious or dangerous.

This is in addition to the rule about serious and dangerous faults: even one serious or one dangerous fault is an automatic fail, regardless of how few minors you have. You could have zero minors and still fail if you commit a single serious fault.

So to pass your driving test, you need:

  • 15 or fewer minor faults
  • Zero serious faults
  • Zero dangerous faults

In practice, most candidates who pass have between 3 and 8 minor faults. It's rare for someone to pass with exactly 15, though it does happen. And it's worth noting that 15 is a generous allowance — if you're consistently making that many errors, there may be areas of your driving that need more work even after you pass.

The minors are recorded by the examiner on the marking sheet (form DL25) throughout the test. Each minor is a tick in the relevant category — mirrors, junctions, steering, positioning, and so on. At the end, all the ticks across all categories are totalled.

Can you get 16 minors and pass your driving test?
No. If you accumulate 16 or more minor faults (driving faults), you automatically fail the test, even if none of them are serious or dangerous. The maximum number of minors you can have and still pass is 15. However, reaching 15 minors is uncommon among successful candidates — most people who pass have between 3 and 8 minors.

When Minor Faults Become Serious Faults

One of the most asked questions about the driving test is whether repeating the same minor fault automatically upgrades it to a serious. The answer is: no, it's not automatic, but it can happen.

Here's how it works in practice. The examiner is trained to assess whether a pattern of repeated minor faults indicates a habitual problem that could become dangerous. If they judge that it does, they have the discretion to record a serious fault instead of another minor.

Example scenario:

  • You forget to check your left mirror before turning left — minor fault
  • Two junctions later, you forget again — another minor fault
  • A third time, on a busy road with a cyclist present — the examiner may decide this is now a serious fault because the habitual failure to check could endanger a vulnerable road user

But here's the nuance: context matters enormously. The examiner considers:

  • Is it the same specific error each time, or different types of error within the same category?
  • Could the repeated error realistically lead to a dangerous situation?
  • Does the candidate seem unaware of the fault, or are they making an effort but occasionally slipping?

There is no fixed number of minors in one category that triggers an automatic upgrade. The commonly cited "3 minors in one area = serious" is a myth — it's not written in any DVSA guidance. However, 3+ minors in the same specific area will certainly draw the examiner's close attention.

Read our detailed guide to common driving test faults for more on this topic.

Do 3 minors in one category fail you on the driving test?
No, there is no automatic rule that 3 minors in one category equals a serious fault or a fail. This is a common myth. The examiner uses professional judgement to decide whether a pattern of repeated minor faults indicates a habitual problem that could become dangerous. If they judge it does, they may record a serious fault — but this depends on the specific circumstances, not a fixed count. In practice, getting 3 or more minors in the same area does increase the risk of a serious fault being recorded.

Most Common Minor Faults and How to Avoid Them

Knowing which minors are most frequently recorded can help you target your practice where it matters most. Here are the top minor faults that appear on marking sheets, based on DVSA data:

1. Mirrors — not checking before changing direction or speed

This is the single most common minor fault. Every time you brake, signal, turn, or change lane, the examiner expects to see a mirror check before the action. The fix: make the MSM (Mirror, Signal, Manoeuvre) routine absolutely automatic. In your practice sessions, have your instructor prompt you every time you miss a mirror check until it becomes second nature.

2. Junctions — observation

Not looking thoroughly enough at junctions before pulling out or turning. The fix: always look right-left-right at a T-junction, and take an extra look in the direction of greatest danger. Never rush out of a junction — an extra second of looking is never faulted.

3. Steering — control

Wandering within your lane, positioning too wide or too close to parked cars, or inconsistent steering on bends. The fix: keep both hands on the wheel, look well ahead (not just at the bonnet), and feed the wheel smoothly through your hands on turns.

4. Moving off — safety

Forgetting the blind spot check before pulling away. The fix: every single time you move off from stationary, check the right blind spot. Make it a non-negotiable part of your routine, even if you've only been stopped for a few seconds.

5. Use of speed — inappropriate

Driving too slowly or too fast for conditions. The fix: know the speed limits, drive at an appropriate speed for the conditions, and maintain good progress on clear roads. Aim for 28-29 mph in a 30 zone, not 22 mph.

What is the most common minor fault on the driving test?
The most common minor fault is failing to check mirrors before changing direction or speed. This includes not looking in the mirror before braking, signalling, turning, or changing lanes. The MSM routine (Mirror, Signal, Manoeuvre) should be applied before every change in speed or direction. The second most common minor is poor observation at junctions — not looking thoroughly enough before emerging or turning.

How Faults Are Recorded During the Test

Understanding how the examiner records faults can demystify the process and reduce anxiety about every small mistake.

The examiner carries a marking sheet (form DL25 — now often a digital tablet) divided into 31 categories of driving competence. These range from "controlled stop" and "move off" through "use of mirrors", "junctions", "positioning", "pedestrian crossings", and more.

How the examiner marks in real time:

  • They observe a fault (e.g., you don't check your left mirror before turning left)
  • They make a quick note on the marking sheet — a tick in the relevant category and column (minor, serious, or dangerous)
  • They continue observing your driving

The examiner does this continuously throughout the test. They're trained to mark without it affecting their ability to assess your driving. You might occasionally notice them making a note — don't let this distract you. A single tick doesn't mean you've failed. Remember, you can have up to 15 of those ticks and still pass.

Important note: The examiner makes their assessment at the time of the fault. They don't go back and reclassify faults after the test. If something is marked as a minor in the moment, it stays a minor. The exception is if they later observe a pattern that leads them to record a subsequent similar fault as serious.

After the test, you'll receive a copy of this marking sheet. It shows exactly which categories had faults and what type each fault was. This is the most useful feedback document you'll ever receive about your driving — whether you pass or fail, study it carefully.

Can the examiner change a minor to a serious after the test?
No, the examiner assesses each fault at the time it occurs and records it immediately on the marking sheet. They don't go back after the test and reclassify faults. However, if they observe a repeated minor fault pattern during the test, they may record a subsequent instance as a serious fault at that point. The classification is made in real time based on the examiner's professional judgement of the circumstances at that moment.

What Happens If You Fail Your Driving Test

Failing your driving test is disappointing, but it's not a disaster. Nearly half of all candidates fail — you're in very common company. Here's what happens and what to do next.

At the test centre: The examiner will tell you that you haven't passed and go through the marking sheet in detail. They'll explain each serious or dangerous fault and discuss your minor faults. Listen carefully and ask questions — this feedback is extremely valuable. You'll receive a copy of the marking sheet to take away.

The waiting period: You must wait a minimum of 10 working days (two calendar weeks) before taking another test. You can rebook immediately on the DVSA website, but the earliest available slot will be at least 10 working days away. Given current waiting times, you may actually wait several weeks for an available date.

What to do between tests:

  • Share the marking sheet with your instructor. They can interpret the faults in context and plan targeted lessons to address your specific weaknesses.
  • Focus on the faults that caused the fail. If you failed for observation at junctions, spend your next few lessons practising junctions specifically. Don't just do general driving practice.
  • Book 3-4 focused lessons rather than 10 hours of general practice. Quality over quantity.
  • Do mock tests again. Rebuild your confidence with exam-condition practice.
  • Use DriveSim to practise the specific skills that let you down, whether that's roundabout approaches, mirror routines, or manoeuvres.

Cost of rebooking: You'll need to pay the full test fee again (£62 weekday, £75 evening/weekend). There's no discount for retakes.

How many attempts can you have? There's no limit. You can take the driving test as many times as you need to. However, your theory test pass is only valid for 2 years. If your theory certificate expires before you pass the practical, you'll need to retake the theory test first.

Many excellent drivers failed their first test. The experience of failing, getting specific feedback, and working on weaknesses often produces better, safer drivers than those who scraped through first time. Don't view it as a failure — view it as part of the process.

What happens at the end of the driving test if you fail?
The examiner will tell you the result and go through your faults in detail, explaining each serious or dangerous fault and discussing your minor faults. You'll receive a copy of the marking sheet (form DL25) to take away. You must wait at least 10 working days before rebooking. There's no limit to how many times you can take the test, but your theory test pass must still be valid (it lasts 2 years). The retake costs the same as the original test. Use the feedback to target your practice specifically on the areas that caused the fail.