Interest Rates9 min readDecember 18, 2025

Understanding Car Loan Interest Rates in Australia: What You Need to Know

Interest rates can make a difference of thousands of dollars over the life of your car loan. Understanding how they work is essential for every car buyer.

When financing a vehicle in Australia, the interest rate you receive is arguably the most important factor determining your total loan cost. A difference of just one or two percentage points can translate to thousands of dollars over a typical five-year loan term. Yet many Australians accept the first rate offered without understanding how these rates are determined or that better options might be available. This guide provides a comprehensive overview of car loan interest rates in Australia, helping you navigate the market with confidence.

What Determines Car Loan Interest Rates?

Car loan interest rates in Australia are influenced by a complex interplay of macroeconomic factors, lender policies, and individual borrower characteristics. Understanding these factors helps you identify opportunities to secure better terms and provides context for the rates you are offered.

At the broadest level, the Reserve Bank of Australia's cash rate serves as a benchmark for lending rates across the economy. When the RBA raises or lowers this rate, lenders typically adjust their car loan rates accordingly, though not always immediately or proportionally. This is why car loan rates tend to move with broader economic conditions.

Competition among lenders also drives rates. Banks, credit unions, online lenders, and dealer finance all compete for your business, and this competition generally benefits borrowers. However, the degree of competition varies across market segments, with prime borrowers often seeing the most competitive offers.

Fixed vs Variable Interest Rates

Australian car loans typically come with fixed interest rates, meaning your rate and monthly payment remain constant throughout the loan term. This predictability makes budgeting straightforward and protects you from rate increases during your loan period. Most borrowers prefer fixed rates for this certainty.

Some lenders offer variable rate car loans, where the interest rate can change in response to market conditions. Variable rates might start lower than fixed rates but carry the risk of increasing over time. If rates rise significantly, your monthly payments could become more burdensome than anticipated.

When choosing between fixed and variable, consider your risk tolerance and expectations about future rate movements. In a rising rate environment, locking in a fixed rate provides security. When rates are expected to fall, a variable rate might save money, though predictions are never certain.

How Your Credit Score Affects Your Rate

Your credit score is the single most influential factor in determining the interest rate lenders will offer you. This three-digit number summarizes your credit history and indicates to lenders how risky you are as a borrower. Higher scores signal reliability and typically qualify for the lowest advertised rates.

In Australia, credit scores generally range from 0 to 1200, depending on the credit reporting agency. A score above 800 is usually considered excellent, while scores below 500 may significantly limit your options or result in much higher rates. The difference between an excellent and average credit score can mean 2-4% in interest rate, translating to thousands of dollars over a loan term.

Before applying for a car loan, obtain your credit report from agencies like Equifax, Experian, or illion. Check for errors that might be lowering your score, such as incorrect late payments or accounts that do not belong to you. Disputing and correcting errors can improve your score before you apply.

The Impact of Loan-to-Value Ratio

The loan-to-value ratio, or LVR, compares how much you are borrowing against the vehicle's value. A lower LVR, achieved by making a larger deposit, typically results in better interest rates. This is because the lender's risk is reduced when you have more equity in the vehicle from the start.

For example, borrowing $25,000 for a $30,000 car gives an LVR of about 83%. Borrowing $28,000 for the same car results in a 93% LVR. Lenders view the first scenario as less risky and may offer a lower rate accordingly. Some lenders have specific rate tiers based on LVR thresholds.

Saving for a larger deposit not only reduces your LVR but also decreases the principal you are borrowing, resulting in lower total interest costs. Even if you cannot save enough to significantly affect your rate tier, a larger deposit still reduces your overall loan cost.

New Car vs Used Car Interest Rates

Lenders generally offer lower interest rates for new vehicles compared to used cars. This difference reflects the lower risk associated with new car lending. New cars have known values, warranties that reduce repair risks, and typically depreciate more predictably than used vehicles.

Used car loans often carry rates 1-3% higher than equivalent new car loans. Additionally, some lenders restrict used car financing to vehicles under certain ages, commonly five to seven years old. Older vehicles may require unsecured personal loans, which typically carry even higher rates.

When considering a used car, factor the higher interest rate into your total cost comparison. Sometimes the savings on purchase price are partially offset by higher financing costs. Our car loan calculator can help you compare scenarios with different rates.

Comparison Rate: The True Cost Indicator

Australian consumer credit laws require lenders to display a comparison rate alongside the advertised interest rate. The comparison rate includes most fees and charges associated with the loan, providing a more accurate picture of the true cost. This makes comparing offers from different lenders more meaningful.

For example, a lender might advertise 6.5% interest but have high establishment fees, resulting in a comparison rate of 7.2%. Another lender advertising 6.9% with minimal fees might have a comparison rate of 7.0%, making it the better deal despite the higher headline rate.

Always check the comparison rate when evaluating loan offers. However, note that comparison rates are calculated on a standard $30,000 loan over 5 years, so actual costs may vary for different loan amounts and terms. Still, the comparison rate provides a useful standardized benchmark.

Where to Find the Best Rates

Different types of lenders offer varying rate ranges and suit different borrower profiles. Banks often provide competitive rates for customers with existing relationships and strong credit profiles. Credit unions may offer lower rates to members, particularly for borrowers with good but not excellent credit.

Online lenders and fintech companies have disrupted the market with streamlined applications and competitive rates. These lenders often have lower overhead costs, allowing them to pass savings to borrowers. However, their rates may vary significantly, and some specialize in specific borrower segments.

Dealer finance can be convenient but often carries higher rates than direct lending. Dealers typically receive commissions for arranging finance, which can inflate costs. Always compare dealer finance offers against quotes you have obtained independently before accepting.

Strategies to Secure Lower Rates

Several practical strategies can help you obtain the best possible interest rate on your car loan. Start by shopping around extensively. Obtain quotes from at least three to five lenders, including different lender types. Having multiple offers gives you leverage for negotiation.

Improve your credit position before applying. Pay down existing debts, ensure all accounts are current, and avoid applying for new credit in the months before your car loan application. Each credit application can temporarily lower your score.

Consider the timing of your purchase. End-of-financial-year sales, model changeover periods, and holiday promotions sometimes come with manufacturer-subsidized finance rates. While you should not delay essential purchases indefinitely, awareness of promotional periods can save money.

Do not overlook negotiation. Many lenders have flexibility in the rates they offer, particularly for well-qualified borrowers. If you have a competitive quote from another lender, ask if your preferred lender can match or beat it. The worst they can say is no.

Conclusion

Interest rates are a critical component of car loan costs that deserve careful attention from every vehicle buyer. Understanding how rates are determined, what factors influence your personal rate, and where to find competitive offers empowers you to make better financial decisions. By taking time to compare options and potentially improve your borrowing profile before applying, you can secure rates that save significant money over your loan term.

Before committing to any car loan, use our free calculator to see exactly how different interest rates affect your monthly payments and total costs. This knowledge ensures you enter negotiations informed and ready to secure the best possible deal.

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