Secured vs Unsecured Car Loans: What's the Difference?

A secured car loan uses the vehicle as security for the lender, which typically means a lower interest rate. An unsecured car loan has no asset backing, so rates are higher but you are free to sell the car at any time. On a $25,000 loan over five years, the difference can be $3,000 or more in total interest. Here is how to decide which structure suits you.

Why the secured vs unsecured decision matters more than the rate

Most Australians focus on the interest rate when comparing car loans, but the loan structure affects more than just the monthly repayment. In 2026, secured car loan rates in Australia start from around 6.5% for strong applicants, while unsecured rates typically begin at 10% or higher. That rate gap drives a significant cost difference, but it also determines whether you can sell the car freely, what happens if you default, and whether the vehicle appears on the Personal Property Securities Register (PPSR).

The real cost difference: secured vs unsecured

Here is what the numbers look like on a $25,000 car loan over five years, comparing a secured rate of 7.5% with an unsecured rate of 12%.

Over five years, the unsecured loan costs roughly $3,100 more in interest even after accounting for the lower establishment fee. That gap widens on larger loans and narrows on smaller ones.

When the gap narrows

On loans under $10,000, the total interest difference shrinks to around $1,000 to $1,500. Factor in the secured loan's higher establishment fee and the PPSR registration, and the practical difference can be under $800. For smaller loans, the flexibility of unsecured may be worth the modest premium.

What secured actually means: the PPSR

When you take out a secured car loan, the lender registers a security interest against the vehicle on the Personal Property Securities Register (PPSR). This is the legal mechanism that makes the car collateral for the loan.

What that means in practice: you own the car and drive it normally, but you cannot sell it without the lender's consent while the loan is active. If a buyer checks the PPSR (and they should, it costs $2 per search), they will see the security interest listed against the vehicle's VIN.

If you sell the car privately without clearing the PPSR, the lender's security interest follows the vehicle. The buyer could lose the car to the lender if you stop making repayments. This is why dealers and savvy private buyers always run a PPSR check before purchasing.

With an unsecured loan, there is no PPSR registration. You can sell the car at any time without needing the lender's involvement. The loan remains your personal obligation regardless of whether you still own the vehicle.

Secured vs unsecured: full comparison

What happens if you default

The consequences of falling behind on repayments differ significantly between secured and unsecured car loans.

Secured loan default: The lender can repossess the vehicle after following the required notice period (typically 30 days of arrears). They sell the car, usually at auction, and the sale price rarely matches the loan balance due to depreciation and selling costs. You remain liable for any shortfall, plus the lender's recovery costs. A new car loses around 20% of its value in the first year, so early defaults often leave a substantial gap.

Unsecured loan default: The lender cannot take the car because it was never used as security. Instead, they pursue the debt through collections and potentially legal action. A default is listed on your credit report for five years. If the lender obtains a court judgment, they can garnish wages or pursue other assets, but they cannot specifically target the car.

Neither outcome is good. The secured default is faster and more disruptive (you lose the car). The unsecured default is slower but the debt follows you longer without a clear resolution path.

When to choose a secured car loan

A secured car loan is the better option in most situations. Choose secured when you are buying a newer vehicle (under 7 to 10 years old), you plan to keep the car for the full loan term, and the lower rate will save you meaningful money.

Best for: New or near-new cars over $15,000 where you want the lowest possible rate and plan to keep the vehicle.

When an unsecured car loan makes more sense

There are specific situations where unsecured is the smarter choice, despite the higher rate.

Older vehicles. If the car is over 12 years old, most lenders will not accept it as security. An unsecured loan may be your only option. Even if a lender does accept an older car, the rate advantage shrinks because the lender prices in the depreciation risk.

Small loans under $10,000. The rate gap costs you less in absolute dollars, and the secured loan's establishment fee and PPSR registration eat into the saving. The flexibility to sell the car without lender involvement may be worth more than the modest interest saving.

You plan to sell the car before the loan ends. If you upgrade vehicles every two to three years, the PPSR constraint becomes a real inconvenience. An unsecured loan lets you sell privately at any time and use the proceeds however you choose.

You want the car separate from the debt. Some borrowers prefer the clean separation. If something goes wrong financially, the car is not at risk of repossession. This is a personal risk preference, not a financial optimisation.

Which is better by situation

How to check if a car has existing finance

Before buying any used car, run a PPSR search at ppsr.gov.au. It costs $2 per search and tells you whether any lender has a registered security interest against the vehicle. If a security interest exists and is not discharged at settlement, the previous lender can repossess the car from you even though you paid the seller.

This article is general information only and is not financial advice.