A car loan looks simple on the dealer's screen: a shiny weekly figure and a smiling salesperson. But that weekly number is engineered to look small, and the total you hand over across the life of the loan can be thousands more than you expect. This guide walks through the parts that actually move your repayment — the rate, the term, and the balloon — so you can see past the headline figure.
DriveTruth doesn't sell loans, cars or leases. We have no finance to push, so the aim here is simple: help you understand what you're signing before you sign it. Plug your own numbers into the car loan calculator as you read, and the maths below will make a lot more sense.
The three levers that decide your repayment
Almost every car loan comes down to three things working together. Change one and the whole picture shifts.
- Amount financed — the drive-away price minus your deposit or trade-in. The more you borrow, the more interest you pay, so a bigger deposit is the cheapest way to cut your total.
- Interest rate and term — a longer term (say 7 years instead of 5) drops the weekly figure but stretches interest over more years, so you pay more overall. A lower rate does the opposite.
- Balloon (residual) payment — a lump sum parked at the end of the loan. It shrinks your regular repayment now, but you still owe that amount later, and you pay interest on it the whole way through.
Comparison rate vs advertised rate
The advertised rate is not the full cost of borrowing. By law, whenever a lender advertises a rate they must also show a comparison rate, which folds in most standard fees so you can line up two loans fairly. One catch worth knowing: the comparison rate is calculated on a standard loan amount and term set by regulation, not your actual loan, so treat it as a level playing field for comparing lenders rather than your exact cost. A loan with a tempting low headline rate and fat monthly fees can easily cost more than a plainer loan with a higher sticker rate. Always compare the comparison rate — and read what fees sit outside it, because some (like early-exit fees) still won't be captured.
The balloon payment trap
Balloons are popular because they make the weekly number look brilliant. The catch is that the balloon doesn't make the debt disappear — it just delays it, and you accrue interest on that deferred amount for the entire term.
Secured vs unsecured, fixed vs variable
Most car loans are secured against the vehicle, which usually means a lower rate — but the lender can repossess the car if you default. Unsecured loans cost more but don't tie up the car. Fixed rates give you a repayment you can budget around for the whole term; variable rates can move with the market, up or down. There's no universally 'right' answer here — it depends on how much certainty you want and how long you plan to keep the car.
What people forget to budget for
The loan only covers the purchase. The car keeps costing you money every week it sits in the driveway, and a repayment you can technically afford can still leave you stretched once the real running costs land.
- On-road costs — stamp duty, registration and dealer delivery are part of the drive-away price you're financing. Build the real figure with the drive-away price calculator first.
- Insurance — comprehensive cover is often a condition of a secured loan, so price it before you commit.
- Fuel or charging, servicing and tyres — the ongoing costs that decide whether the car actually fits your budget.
Car Loan Repayment Calculator
Repayments with optional balloon, total interest and total cost.
Is a loan even the right tool?
If you're buying through salary packaging, a novated lease can sometimes beat a straight car loan after tax — but only sometimes, and the savings are frequently oversold. Whether it actually stacks up depends on your income and marginal tax rate, how Fringe Benefits Tax is treated (an eligible electric vehicle priced under the luxury car tax threshold for fuel-efficient cars can currently be FBT-exempt, which shifts the maths a lot), and the residual you're left owing at the end. Run your own numbers through the novated lease vs loan calculator to see the true net difference rather than trusting a sales pitch, and confirm the current rules with the ATO. And if you want the full lifetime picture — finance plus depreciation plus running costs — the total cost of ownership tool pulls it all together.
A car loan is a perfectly reasonable way to buy a car. Just make sure you're deciding based on the total you'll repay, not the weekly figure someone wants you to focus on.
Novated Lease Calculator
Your true net saving vs a car loan — residual, FBT, GST and EV exemption included.
Frequently asked questions
Should I take a balloon payment on my car loan?
Only if you have a clear plan to pay it. A balloon lowers your regular repayments but leaves a lump sum owing at the end, and you pay interest on that amount for the whole term. If you can't pay it in cash when it falls due, you'll have to refinance or sell — and if the car has depreciated below the balloon, you'll be out of pocket. Model it with and without a balloon in the car loan calculator before deciding.
What's the difference between the advertised rate and the comparison rate?
The advertised rate is just the interest. The comparison rate also includes most standard fees, so it reflects the true cost of borrowing and lets you compare loans fairly. It's worked out on a standard loan amount and term set by regulation, so it won't exactly match your loan — but it's still the fairest way to line up lenders. A low advertised rate with high fees can cost more than a higher-rate loan with none, so compare the comparison rate and still check for fees that sit outside it, like early-exit charges.
Does a longer loan term save me money?
No — it just spreads the cost. A longer term lowers each repayment but stretches interest over more years, so you almost always pay more in total. A shorter term with a bigger deposit is the cheapest overall, provided the higher repayments still fit your budget comfortably.
Should I get a car loan or a novated lease?
It depends on your income, marginal tax rate and how FBT is treated. A novated lease can beat a loan after tax for some salary-packaged buyers — and an eligible EV under the luxury car tax threshold can currently be FBT-exempt, which tilts the maths further — but the savings are often overstated once fees and the residual are counted. Run both through the novated lease vs loan calculator using your own figures, and confirm the current FBT rules with the ATO, rather than relying on a seller's estimate.
General information only — not financial, tax or legal advice. Figures change; confirm with the ATO, your state revenue office and a licensed adviser, and use the calculators for your own numbers.