Short answer: a well-chosen used car is usually cheaper over the first five years because someone else has absorbed part of the early depreciation. A new car may still offer better value if you keep it for many years, receive competitive finance, or value warranty cover, current safety technology and predictable maintenance.
The right comparison is not the sticker price alone. Compare the vehicle's loss in value plus every cost of keeping it on the road.
New versus used: the key differences
Cost or benefit | New car | Used car |
|---|---|---|
Purchase price | Usually higher | Usually lower |
Depreciation | Often greatest in the early years | Usually slower after the first owner |
Warranty | Full manufacturer warranty | May have limited or no remaining warranty |
Repairs | Generally more predictable early on | Higher risk as age and kilometres increase |
Finance | Promotional rates may be available | Rates can be higher, so compare the total amount repaid |
Choice | Latest specification and safety features | More vehicle for the same upfront budget |
Use total cost of ownership, not purchase price
A fair comparison uses this formula:
Total ownership cost = depreciation + finance cost + registration and compulsory charges + insurance + fuel or electricity + servicing, tyres and repairs + parking and tolls.
Depreciation is the purchase price minus the amount you expect to receive when you sell or trade the car. Do not add the full purchase price and depreciation together: that counts the same loss twice.
Finance should also be handled separately. Compare interest, establishment fees and any balloon payment, rather than adding loan repayments on top of the full vehicle price. The principal portion of a repayment is paying for the asset; interest and fees are the additional ownership costs.
Illustrative five-year cost comparison
This example shows the method rather than predicting the cost of a particular model. It assumes both cars travel 15,000 km a year and excludes finance, parking and tolls because those depend on the buyer and location.
Five-year item | New car | Three-year-old used car |
|---|---|---|
Purchase price | $40,000 | $30,000 |
Estimated resale value after five years | $22,000 | $18,000 |
Depreciation | $18,000 | $12,000 |
Fuel | $12,600 | $13,500 |
Insurance | $6,500 | $5,500 |
Servicing, tyres and repairs | $3,000 | $6,000 |
Registration and compulsory charges | $5,000 | $5,000 |
Total ownership cost | $45,100 | $42,000 |
In this illustration, the used car costs $3,100 less over five years. The result can reverse if the used car needs major repairs, attracts expensive finance or has poor resale value. Replace every estimate with quotes for the exact vehicles you are considering.
1. Depreciation usually decides the result
New cars normally lose value fastest while they are newest. A buyer who sells again after only a few years may carry much of that loss. A used-car buyer starts from a lower price, so there is usually less money at risk even if the percentage loss looks similar.
Keeping a new car for eight to ten years can spread its early depreciation across a longer period. That is why ownership length matters more than a simple new-versus-used rule.
2. Finance can erase a cheaper purchase price
Compare loans using the comparison rate, fees, term and total amount repayable. A lower used-car price does not guarantee a lower total cost if its interest rate is materially higher. Likewise, a low advertised repayment can hide a longer term or a large balloon payment.
Get finance quotes before choosing the car. Compare dealer finance with independent lenders and leave room in the budget for registration, insurance and repairs.
3. Insurance must be quoted for each vehicle
Insurance premiums depend on the car, drivers, address, annual kilometres, where the car is kept, cover type and excess. An older car is not automatically cheaper to insure. Obtain like-for-like quotes for both vehicles and compare exclusions as well as price.
Compulsory third party insurance covers injuries, not damage to vehicles or property. The way it is purchased varies by state and territory, so include the correct local registration and insurance charges.
4. Servicing and repair risk
A new car normally provides the most predictable early ownership period because it has a manufacturer warranty and fewer worn components. Check the warranty conditions and capped-price servicing schedule rather than assuming every cost is covered.
For a used car, review the service history and arrange an independent pre-purchase inspection. Budget for tyres, brakes, the battery and scheduled items due soon. Check the VIN through the Personal Property Securities Register before buying privately so you can identify a recorded security interest, stolen status or written-off status.
5. Fuel, electricity and real driving
Use your own annual kilometres and realistic energy consumption. The official fuel or energy figure is useful for comparison, but traffic, towing, climate and driving style change the result.
For an electric vehicle, compare home and public charging costs. Home charging may be cheaper, but installation can add an upfront cost. Government concessions change over time and differ by location, so check the current state or territory rules before relying on them.
When buying new can make sense
You plan to keep the vehicle for many years.
You want the latest safety equipment or a specific specification.
Warranty cover and predictable servicing are important to you.
A strong finance offer lowers the total amount repaid.
The model has strong expected resale value.
A current EV concession or fleet arrangement materially changes your calculation.
When buying used is usually better value
You want to minimise upfront cost and early depreciation.
You can find a two- to four-year-old example with complete service history.
An independent inspection shows no major work is due.
The used-car finance rate remains competitive.
You are comfortable without the full new-car warranty.
A practical buying checklist
Choose the exact new and used vehicles you want to compare.
Decide how many years and kilometres you expect to keep the car.
Estimate resale value conservatively.
Get written finance and insurance quotes.
Add local registration, compulsory insurance and transfer or stamp-duty costs.
Estimate fuel or charging using your real annual kilometres.
Check servicing schedules, tyre condition and upcoming repairs.
Inspect a used vehicle and check its VIN and service history.
Run a best-case and worst-case repair scenario.
Choose the car that fits both your budget and risk tolerance.
Bottom line
For many Australian buyers in 2026, a reliable two- to four-year-old used car will produce the lowest five-year ownership cost. It avoids much of the earliest depreciation while still offering modern safety and comfort.
A new car can be the better-value decision when you keep it for a long time, secure favourable finance and value warranty-backed predictability. The defensible answer comes from comparing depreciation and running costs for two specific vehicles—not from purchase price alone.