When buying a car, the choice between new and used doesn’t just affect what you drive, it can dramatically change what you pay for car insurance.
With premiums at record highs across the UK, the ABI (Association of British Insurers) reports the average cost of comprehensive car insurance reached £635 in 2024, the highest since records began. It has never been more important for drivers, particularly in London, to understand how their car purchase influences their policy.
How Car Age and Value Affect Insurance Premiums
New cars often come with a higher price tag, and insurance companies base premiums on the vehicle’s replacement value. If you crash a £25,000 new hatchback, your insurer faces a much larger repair or replacement bill than if you owned a £5,000 used equivalent.
Modern vehicles are also fitted with sophisticated technology; parking sensors, lane-assist cameras, advanced infotainment systems, all of which makes repairs more expensive. Specialist parts and technicians push up claims costs, and insurers pass these risks back to drivers in the form of higher premiums.
In contrast, used cars tend to attract lower premiums because their market value is smaller. However, older vehicles are not without issues: insurers may view them as more prone to breakdowns or accidents due to wear and tear, and certain models with scarce parts or modifications can actually cost more to cover.
ULEZ and Environmental Rules: Another Factor in Costs
For London drivers, the Ultra Low Emission Zone (ULEZ) adds another financial layer to the decision between new and used cars. Vehicles that don’t meet Euro 6 standards for petrol (2015 and newer) or Euro 4 standards for diesel (2016 and newer) are subject to a daily £12.50 charge when driving within the zone.
While this isn’t an insurance premium in itself, insurers are increasingly factoring environmental policies and vehicle compliance into their risk assessments. Newer, low-emission cars (particularly hybrids and EVs) may attract slightly lower premiums because they are exempt from ULEZ and seen as less costly to run in the long term.
By contrast, older petrol and diesel cars, while cheaper to buy and often cheaper to insure initially, can rack up significant ongoing costs if used regularly within London. For many drivers, the combined cost of ULEZ fees and insurance premiums makes upgrading to a compliant vehicle more attractive despite the higher upfront price.
Repair Costs and Parts Availability
For newer cars, parts are standardised and widely available, helping insurers manage repair costs. But the high labour charges for repairing advanced tech, from ADAS cameras to EV batteries, can keep premiums high.
Used cars can present the opposite problem: while cheaper to buy, sourcing older or discontinued parts can be challenging and costly. Insurers may flag these as higher-risk, especially if a car has been modified by a previous owner.
Safety Features: A Double-Edged Sword
Modern cars often come equipped with advanced safety features such as automatic emergency braking, blind-spot monitoring, or adaptive cruise control. Insurers typically reward these with lower premiums, since they reduce accident likelihood.
Older cars lack these features, which can make them riskier in the eyes of insurers. However, some classic or well-maintained vehicles may qualify for specialist insurance policies that recognise their lower mileage or careful usage.
The London Premium
Drivers in London face steeper costs than the rest of the UK, regardless of whether they buy new or used. Higher accident rates, denser traffic, and elevated car theft risks all push premiums up. According to Compare the Market, average premiums in London exceed £1,200 for drivers under 30, double the national average.
Choosing a lower-value used vehicle in the capital can be one way to reduce costs, particularly for young drivers. However, insurers will also consider postcode risk, overnight parking (driveway vs. street), and security measures such as alarms or trackers.
Insurance Groups and Why They Matter
Every car sold in the UK is assigned an insurance group (1–50) by the Group Rating Panel, which includes the ABI and Thatcham Research. Cars in Group 1 are the cheapest to insure; cars in Group 50 are the most expensive.
- A new Volkswagen Golf (Group 15–20) may be pricier to insure than a used Ford Fiesta (Group 5–10), even if both are safe and reliable.
- Electric cars often sit in higher groups due to battery replacement costs.
Checking a vehicle’s insurance group before buying can save hundreds annually.
When Temporary Car Insurance Makes Sense
Short term car insurance has become a popular option, particularly in London where car ownership is lower, and many people borrow cars instead of buying outright.
Temporary insurance can cover you for:
- Test-driving a car before committing to purchase.
- Driving a new car home from the dealership.
- Sharing cars between households.
This flexibility allows drivers to avoid committing to a full 12-month policy when they only need cover for a few hours or days.
Tips to Reduce Premiums on New and Used Cars
- Pay annually, not monthly: avoids interest charges.
- Increase your voluntary excess: lowers the base premium.
- Install black box telematics: particularly useful for younger London drivers.
- Add a named driver: placing an experienced parent on the policy can reduce costs.
- Improve security: secure parking, dashcams, and immobilisers all help.
The Bottom Line
The decision between buying new or used doesn’t just affect your bank balance at the dealership, it also changes what you’ll pay year after year in insurance premiums.
For Londoners in particular, where premiums are among the highest in the UK, the right choice of car (alongside careful use of insurance groups, safety features, and temporary policies) can mean the difference between manageable cover and eye-watering costs.
As insurers, regulators, and drivers continue to wrestle with record-high prices, one thing is clear: understanding how your choice of car affects your policy is one of the smartest financial decisions you can make on the road.
