Used Car Vs New Car Cost Comparison — Dave's Complete Guide

The Numbers Do Not Lie

There is a widely held belief that Buying a new car is always a waste of money and buying used is always the smart play. Like most widely held beliefs, it is mostly right but not entirely.

Buying used is almost always cheaper overall. But there are specific situations where buying new can make financial sense, particularly when manufacturer incentives, low-rate finance deals, and warranty cover are factored in.

Let me crunch the numbers properly so you can see where the real differences lie.

Depreciation: The Biggest Cost of Car Ownership

Depreciation is the difference between what you pay for a car and what it is worth when you sell it. It is, by a considerable margin, the single biggest cost of owning any car, and it hits new car buyers hardest.

If you are weighing up alternatives, our guide to How to Transfer Car Ownership When Buying Private covers similar ground from a different angle.

A new car typically loses 15 to 35 percent of its value in the first year alone. After three years, most cars have lost 40 to 60 percent of their original price. This is money you never get back.

Let me put that into real numbers with a worked example.

New Car Example: Volkswagen Golf 1.5 TSI Life

• New price: £28,000
• Value after 1 year (10,000 miles): approximately £22,500 (depreciation: £5,500)
• Value after 3 years (30,000 miles): approximately £16,000 (depreciation: £12,000)
• Value after 5 years (50,000 miles): approximately £12,000 (depreciation: £16,000)

Over five years, the new Golf has cost £16,000 in depreciation alone. That is £3,200 per year, or £267 per month, just for the privilege of the car getting older.

For more on this topic, take a look at our How To Negotiate On A Used Car And Save Money guide.

Used Car Example: Same Golf, Bought at 3 Years Old

• Purchase price at 3 years old (30,000 miles): £16,000
• Value after 2 more years (50,000 miles): approximately £12,000 (depreciation: £4,000)

The used Golf buyer pays £4,000 in depreciation over two years, or £2,000 per year. That is £1,200 less per year than the new buyer, despite driving exactly the same car.

Insurance Costs

New cars are generally more expensive to insure than used ones because the replacement value is higher. The insurance company bases its premiums partly on how much it would cost to replace the vehicle if it were written off.

You might also find our How to Transfer Car Ownership UK guide useful alongside this one.

Using the Golf example:

• Insurance for the new Golf (£28,000 value): approximately £600 to £900 per year
• Insurance for the 3-year-old Golf (£16,000 value): approximately £450 to £700 per year

The saving is not dramatic, perhaps £100 to £200 per year, but it adds up over the ownership period.

Vehicle Tax (VED)

For cars registered after April 2017, the standard rate of VED is £190 per year regardless of emissions. However, new cars with a list price over £40,000 pay an additional premium of £410 per year for the first five years, making the total £600 per year.

We have covered related ground in our Best Time Of Year To Buy A Used Car Uk guide, which is worth reading if this subject interests you.

This additional charge does not apply when you buy the same car used, because it only applies for the first five years from the date of first registration. So if you buy a car that originally cost £45,000 but is now four years old, you only pay the supplement for one more year instead of five.

For cars registered before April 2017, VED is based on CO2 emissions and can vary from nothing to over £600 per year.

You can check any car's full MOT history for free on GOV.UK before arranging a viewing.

Maintenance and Repair Costs

This is where new cars have an advantage. A new car comes with a manufacturer warranty (typically three to seven years) that covers most repair costs. Maintenance in the early years is usually limited to routine servicing, which costs £150 to £300 per visit.

A Used Car, particularly one out of manufacturer warranty, is more likely to need unexpected repairs. Suspension components, brake discs, clutch plates, and other wear items start needing replacement after four to six years of use.

If things go wrong after purchase, Citizens Advice can help you understand your legal rights.

Before buying, you can check the exact road tax cost on GOV.UK using the registration number.

However, the cost of these repairs is typically far less than the depreciation saving. Even a bad year with £1,500 in unexpected repairs on a used car leaves you ahead of the new car buyer who is losing £3,000 to £5,000 in depreciation over the same period.

You can look up the exact insurance group for any car on Thatcham's website before getting quotes.

Typical Annual Maintenance Costs

• New car (0-3 years): £200 to £400 (routine servicing only)
• Used car (3-6 years): £400 to £900 (servicing plus some wear items)
• Older used car (6-10 years): £600 to £1,500 (servicing plus more frequent repairs)

Finance Costs

New car finance deals can be surprisingly competitive. Manufacturers often subsidise finance rates to shift stock, offering 0% APR or very low rates on new cars that are simply not available on used models.

Used car finance rates are typically higher, ranging from 6 to 15 percent APR depending on the car and your credit score. This means the monthly payments on a used car might be more comparable to a new car than you expect, although you are borrowing a smaller amount overall.

Always compare the total amount payable, not just the monthly figure. A new car at 0% APR costs you nothing in interest. A used car at 9% APR over four years adds significant interest to the total cost.

The Full Cost Comparison

Let me bring it all together with a five-year comparison of the Volkswagen Golf.

Buying New (£28,000)

• Depreciation over 5 years: £16,000
• Insurance (5 years at £750): £3,750
• VED (5 years at £190): £950
• Servicing (5 years at £300): £1,500
• Repairs (covered by warranty for 3 years, then £600 x 2): £1,200
• Total cost of ownership: £23,400
• Annual cost: £4,680

Buying Used at 3 Years Old (£16,000), Keeping for 5 Years

• Depreciation over 5 years (value drops to £6,500): £9,500
• Insurance (5 years at £550): £2,750
• VED (5 years at £190): £950
• Servicing (5 years at £350): £1,750
• Repairs (5 years at £800): £4,000
• Total cost of ownership: £18,950
• Annual cost: £3,790

The used car buyer saves approximately £890 per year, which is £4,450 over the five-year period. That is a significant amount of money.

When Buying New Can Make Sense

Despite the numbers, there are situations where buying new is defensible:

• When manufacturer finance at 0% APR effectively eliminates borrowing costs
• When you want a specific specification that is hard to find used
• When you value the certainty of a full manufacturer warranty
• When you plan to keep the car for 10 years or more, spreading the depreciation over a longer period
• When a specific model holds its value exceptionally well (some Porsches, Land Rovers, and hot hatches depreciate less than average)

When Buying Used Is the Clear Winner

• When you are on a budget and want the most car for your money
• When you are buying a car that depreciates heavily in the first few years (executive saloons, large SUVs)
• When you are happy with a car that is two to five years old and still has life in the warranty
• When you can do basic maintenance yourself or have a trusted local garage
• When you want to avoid being tied into a PCP cycle

Dave's Verdict

For the vast majority of buyers, a used car between two and five years old offers the best balance of value, reliability, and low running costs. You avoid the steepest depreciation curve, you get a car that is still relatively modern and well-equipped, and you can often find examples with remaining manufacturer warranty.

Whatever you decide, and whether you go new or used, knowledge is the key. If you are buying used, run a vehicle check through Dave before committing. It reveals the car's full history, confirms the mileage is genuine, and checks for Outstanding Finance, write-offs, and theft markers. The numbers only work in your favour if the car you are buying is what it claims to be. Use Dave to check any car you are considering.