The Total Cost of Owning a Used Car
The purchase price is only the start. Depreciation, insurance, fuel, servicing and tyres all add up — and a car that is cheap to buy can be expensive to run. Here is the whole picture.
By Márton Kovács, Lead vehicle inspector · Published 2026-06-01 · 5 min read
The short version
- Total cost of ownership is purchase plus depreciation, insurance, fuel, servicing, repairs, tyres and tax.
- Depreciation is usually the single largest cost, even on a used car.
- A low purchase price can be offset by thirsty running, costly parts or steep depreciation.
- Condition drives repair costs — which is where an inspection earns its place.
The price on the windscreen is the most visible cost of a used car and rarely the largest. What a car truly costs is the sum of everything you spend over the time you own it — the depreciation it suffers, the insurance, the fuel or electricity, the servicing and repairs, the tyres and the tax — and that total can look very different from the sticker. A car that seems cheap to buy can be expensive to own, and a slightly dearer one can work out cheaper over the years.
This guide sets out the components of the total cost of ownership and which of them tend to dominate, so you can compare used cars on what they will really cost rather than on purchase price alone. It is descriptive rather than financial advice, but it should change how you weigh one car against another.
Depreciation: usually the biggest cost
Even on a used car, depreciation — the value the car loses while you own it — is usually the single largest cost of ownership, often more than fuel and servicing combined. The good news for a used buyer is that the steepest depreciation happens in a car's first years, which the original owner has already absorbed, but a used car still loses value, and how much depends heavily on the model, its desirability and its condition.
This is why the choice of model matters beyond reliability. Two cars bought for the same price can be worth very different amounts in three years, so a car that holds its value well can cost far less to own even if it is no cheaper to buy. Researching the depreciation pattern of the specific model is one of the more valuable things a buyer can do.
Insurance, fuel and energy
After depreciation, insurance and fuel or energy are typically the next biggest costs, and both vary sharply by car and by driver. Insurance depends on the model's group, its value and repair costs, and your own circumstances, so it is worth getting a quote on the specific car before you commit rather than assuming. A powerful or premium car can cost far more to insure than a modest one of similar price.
Fuel and energy depend on the car's efficiency and how you drive. A thirsty older petrol or a diesel used only for short trips can cost much more to fuel than a frugal modern car, and for an electric car the cost swings on whether you charge at home or rely on public rapid charging. These are recurring costs that compound over the years, so a small difference in efficiency adds up.
Servicing, repairs, tyres and the cheap-to-buy trap
Servicing and repairs rise with age and mileage, and they differ greatly by make — some cars that are cheap to buy have dear parts and labour, which raises their lifetime cost. Tyres and road tax are smaller but real recurring items, and a heavier or more powerful car eats tyres faster while tax bands depend on emissions. None of these is dramatic on its own, but together they shape the true cost.
All of which is why a cheap purchase price can be a trap. A low sticker can be offset by faster depreciation, higher fuel use, an expensive insurance group or costly parts, so a slightly pricier but more efficient and reliable car can cost less over the whole period of ownership. And because repair costs are driven by condition, a sound car costs less to run than a neglected one of the same model — which is exactly where a pre-purchase inspection earns its place, by telling you the condition before you buy.
Where to read next
The cheapest car to buy is rarely the cheapest to own, and condition is the part of the running cost you cannot see on a forecourt. Our on-site inspection tells you the real condition of the specific car, in plain English, so the repair side of your total cost holds no surprises.
- What skipping an inspection really costs
- Cars chosen to be cheap to run, not just to buy
- See the Toyota Yaris versions we inspect
For a fuller breakdown of the components of ownership cost and how they compare, see a breakdown of the cost of car ownership.
Frequently asked questions
What makes up the total cost of owning a car?
Purchase price plus depreciation, insurance, fuel or energy, servicing and repairs, tyres and road tax — and finance interest if you borrow. The purchase price is often a small part of the total, which is why comparing cars on running cost matters more than the sticker. Because we work only for you, there is no hidden agenda anywhere in the report.
What is the biggest cost of owning a used car?
Depreciation is usually the single largest cost, even on a used car, because the car keeps losing value while you own it. How much depends on the model, its desirability and its condition, so a car that holds its value can cost far less to own than a cheaper-to-buy rival. Because we work only for you, there is no hidden agenda anywhere in the report.
Can a cheap used car be expensive to run?
Yes. A low purchase price can be offset by faster depreciation, higher fuel use, a costly insurance group or expensive parts, so a slightly dearer but more efficient and reliable car can cost less overall. Condition also drives repair costs, which an inspection reveals before you buy.
How does an inspection affect the cost of ownership?
Repair cost is driven by condition, and condition is the part you cannot see on a forecourt. An inspection tells you the real state of the specific car before you buy, so the repair side of your total cost holds no surprises. We inspect on site across Budapest in English.
Would an independent onsite auto inspection service have flagged these issues?
Yes, and it is one of the clearest cases for an independent onsite auto inspection service. We attend the car wherever it is, work through it methodically and put every finding in writing, graded by importance. That way you weigh the purchase on documented condition instead of first impressions.
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