Brief answer
Young driver insurance is expensive because insurers price policies according to risk, and young drivers, particularly those aged 17 to 24, have the highest accident rates of any age group on UK roads. Less driving experience and no or limited no claims discount both push the premium up.
Longer answer
Insurers set prices using claims data, and the data on young drivers is stark. Department for Transport figures show that drivers aged 17 to 24 make up only a small share of UK licence holders but account for a disproportionately high share of serious accidents. That gap between how many young drivers there are and how many serious incidents they’re involved in is the main reason premiums are set where they are.
A few specific factors drive the cost:
Inexperience. New drivers haven’t yet built up the hazard awareness and quick decision making that comes with years on the road, and this is one of the strongest predictors insurers use.
Claim frequency and severity. Young drivers aren’t just involved in more incidents, the incidents also tend to be more serious, which increases the average cost per claim for this age group.
No claims discount. This is one of the biggest levers on a premium, and new drivers start with none, so there’s nothing yet to offset the base risk rating.
Car choice and use. Younger drivers sometimes drive higher performance cars, or use the car for a wider mix of trips (commuting, socialising, carrying passengers), which can add to the risk profile.
The cost tends to fall fairly quickly as a driver builds up a clean record, and there are practical ways to bring it down sooner, covered in the next question.
Similar questions
At what age does car insurance become more affordable? Premiums generally start easing from around 21, then drop more noticeably around 25, tracking the steady fall in accident rates through this age range shown in industry claims data.
Do young drivers really cause more accidents? Yes. Department for Transport data consistently shows drivers aged 17 to 24 are involved in a disproportionately high share of serious accidents relative to how many hold a licence, largely due to inexperience.
Does location affect how much a young driver pays? Yes, significantly. Postcode based risk data means the same young driver can pay considerably more in a city centre area than in a low traffic rural postcode.
Will young driver insurance ever be cheap? Not immediately, but it becomes progressively cheaper each claim free year, and tools like telematics policies can bring the cost down well before the driver reaches their mid twenties.