Serious Fault vs Dangerous Fault: What’s the Difference on Your Driving Test?

On the UK driving test a serious fault is something potentially dangerous, while a dangerous fault involves actual danger to you, the examiner, the public or property. Those are the DVSA’s own words on GOV.UK. Both fail your test on their own, no matter how well the rest of the drive went. The third grade, a driving fault (the “minor” everyone talks about), is not dangerous unless you keep repeating it. Here is how an examiner decides which box to tick, with the same manoeuvre marked at each level.

The three fault grades in one line each

Every mistake you make on test gets sorted into one of three grades. The DVSA defines them like this on GOV.UK:

• Driving fault (minor) – not potentially dangerous, but if you keep making the same one it could become a serious fault.
• Serious fault (major) – something potentially dangerous.
• Dangerous fault (major) – actual danger to you, the examiner, the public or property.

That is the whole framework. The word “potentially” is doing the heavy lifting between minor and serious, and the word “actual” is what separates serious from dangerous. Get those two words straight and most of the confusion disappears.

One thing worth clearing up first: officially there is no such thing as a “major” or a “minor”. Those are the nicknames the whole country uses, and even GOV.UK now puts them in brackets, but the examiner is grading dangerous, serious and driving faults. When your instructor says “that’s a major”, they mean a serious or a dangerous fault – either of which is an instant fail.

Serious fault vs dangerous fault: the difference that matters

Here is the bit that catches people out. A serious and a dangerous fault have the exact same consequence – one of either ends your test – so for the purpose of passing, the distinction does not change your result. What changes is why the examiner marked it.

A serious fault is potentially dangerous. The situation had the makings of an incident, but nothing actually happened – often because someone else reacted, or because the road happened to be clear. You did not check a blind spot before moving off; this time there was no cyclist there, but there could have been. The potential for danger was real, so it is serious.

A dangerous fault is when the danger becomes real. Someone had to brake, swerve or take evasive action; you made contact with a kerb hard enough to affect control; the examiner had to touch the wheel or the dual controls. Actual danger to a real person or a real object. That is a dangerous fault.

Grade	DVSA definition	What actually happened	Result
Driving fault (minor)	Not potentially dangerous	A small error, no risk created	Pass, unless repeated or you exceed 15
Serious fault (major)	Something potentially dangerous	The risk was there, but no one had to react	Instant fail
Dangerous fault (major)	Actual danger to you, the examiner, the public or property	Someone or something was genuinely put at risk	Instant fail

So the mental test an examiner is running, moment to moment, is roughly: did that create a real risk, or the possibility of one, or neither? Neither is a minor. Possibility is serious. Real risk is dangerous.

The same manoeuvre marked at all three levels

Grades make far more sense when you watch one action slide up the scale. Take checking your mirrors before moving off from the side of the road, one of the most-marked areas on test.

• Minor. You pull away on a quiet residential street, and you glance in the mirror but skip the right blind spot. Nothing is coming, the road is empty, the risk is genuinely low. The examiner notes a driving fault. Do it once and you are fine.
• Serious. You do the same thing on a busier road where a cyclist could realistically have been in that blind spot. Nobody was there this time, so there is no incident – but the potential for one was clear. That is a serious fault.
• Dangerous. You pull out without the check and a car or bike actually has to brake or swerve to avoid you. The danger is now real. Dangerous fault, test over.

Same missed observation every time. What moves it from minor to serious to dangerous is the level of risk you created, not how it felt to you. This is why instructors drum blind-spot checks into you even on empty roads: on test you have no way of knowing which version of that road you will get. Speed works the same way – drifting 2-3 mph over a clear 30 is usually a minor, carrying 40 past a school at kicking-out time is serious, and forcing a pedestrian to stop short is dangerous. One behaviour, three grades, decided entirely by the risk.

Is a serious fault an automatic fail? How many are allowed?

Yes, and none are allowed. A single serious fault means you have not passed, whatever else you did – GOV.UK is unambiguous that to pass you must make no serious or dangerous faults at all. The pass criteria are two lines: no more than 15 driving faults (minors), and zero serious or dangerous faults. That 15 refers only to minors; there is no allowance to bank a couple of serious faults.

This surprises people who have had a strong drive. You can complete 38 minutes of tidy, confident driving, pick up two or three minors, and still fail on a single serious fault in the last two minutes. The examiner is not weighing your good driving against the bad moment. You can pass with minors, but not with one major of either kind – and the 15-minor limit only matters once the majors are off your sheet, which is why the detail in our guide to how many minor faults you can get is worth knowing too.

What is a dangerous fault on the driving test?

A dangerous fault involves actual danger to you, the examiner, other road users or property, in the DVSA’s words. In plain terms, something real was put at risk: another driver braked hard because of you, a pedestrian had to stop, you hit or badly clipped a kerb, or the examiner had to intervene with the wheel or the dual-control brake. If a member of the public genuinely had to take evasive action, that is the textbook dangerous fault. Dangerous faults are rarer than serious ones – most learner mistakes create potential danger rather than actual danger, because the road is often clear enough that no one has to react – but the two share a result: one of either fails you.

What counts as a serious fault? Common examples

Serious faults cluster in the same places year after year, and the DVSA’s official Top 10 reasons for failing the driving test in Great Britain on GOV.UK is basically a map of where they happen. From the passenger seat, the ones I see marked serious most often are:

• Observation at junctions. Pulling out without looking properly, or misjudging the speed of an approaching car so it has to slow. This is the single most common serious fault on the DVSA’s list.
• Mirrors before changing direction or speed. Changing lanes, turning or braking without the mirror check that should come first.
• Steering and control. Mounting the kerb on a turn or manoeuvre, or losing control of the wheel.
• Positioning. Being in the wrong lane at a roundabout, or sitting where you mislead or endanger others.
• Response to signs and signals. Missing a stop line, ignoring a give-way, or going through on the wrong signal.

None of these are exotic. They are everyday driving done a touch too loosely at the wrong moment. Our full breakdown lives in the guide to the most common reasons people fail the driving test, worth reading alongside this one.

Can I fail if I can’t parallel park?

Not automatically, no – it depends how it goes wrong. The manoeuvre itself is not pass-or-fail; how safely you carry it out is. A slightly untidy park where you stay in control and observe properly might cost you a minor, or nothing at all. Touch the kerb gently and it is usually a minor. But hit the kerb hard, swing wide into the path of traffic, or fail to look while reversing, and you have created potential (or actual) danger – that becomes a serious or dangerous fault. So it is never “I couldn’t park, therefore I failed”; it is the risk you created while parking that the examiner grades. The same logic applies to bay parking, the forward bay and the pull-up-on-the-right manoeuvre.

How faults are marked on the day

Since 2021 examiners record faults on a tablet rather than the old paper DL25, but the grading is identical – dangerous, serious and driving faults, tapped in live as you go. You will not see a running total during the test; you get the result and a debrief at the end. The examiner will always tell you what faults you made, whether you pass or fail.

If you do fail, you book another test and pay again, and the earliest date you can take is at least 10 working days away (that notice period is set by the DVSA on GOV.UK). The current car test fee is £62 to £75 depending on the time and day you book. Use that gap properly: a targeted session on the exact fault that failed you beats booking straight back in and hoping. Our guide on taking an intensive course after failing your driving test walks through how to turn one specific serious fault into a fixed habit rather than a repeat.

Turning “nearly there” into a pass

If you keep failing on one or two serious faults rather than a scattergun of problems, you are genuinely close – and that is a very fixable place to be. The pattern I see most is a learner who drives well but has one recurring blind spot: junction observation, mirror timing, or steering on manoeuvres. Fix that single thing under pressure and the pass follows.

That is exactly what a short, focused course is for. Our Provisional intensive course (10-15 hours) suits drivers who are nearly test-ready and just need to iron out the faults that keep tripping them, rather than a full beginner programme. If you are less sure where you stand, our page on how it works explains how we match the course length to where you actually are, and our guide to passing the driving test first time covers the habits that keep serious faults off your sheet. GetMyPass intensive driving courses are built to get you genuinely test-ready; the examiner still decides on the day, so the aim is always to maximise your chances. Independent driving is one place nervy learners tip into a serious fault by watching the sat-nav instead of the road – if that is your worry, read our guide to independent driving on the UK test before you go.