The key difference is the security
Secured: an eligible asset backs the loan and may be repossessed if you do not repay. Unsecured: no particular asset is pledged, but the debt still has to be repaid. A lower advertised rate alone does not tell you which option costs less or suits your circumstances.
Secured and unsecured loans compared
| Question | Secured | Unsecured |
|---|---|---|
What backs the loan? | An asset accepted by the lender. | No specific asset is pledged. |
What must qualify? | You, the purpose and the proposed asset. | You and the intended borrowing purpose. |
Which costs less? | May offer a lower rate; fees still matter. | Compare your actual quote with the secured option. |
Can I buy a car? | Yes, if the product and vehicle qualify. | Yes, where car purchase is an accepted purpose. |
Can I repay early? | Check that product’s fees and conditions. | Check that product’s fees and conditions. |
What if I cannot repay? | The secured asset may be sold; a balance can remain. | Collection or legal action may follow. |
NAB’s explanation of the two structures provides an overview. Both require a credit assessment; having an asset does not guarantee approval.
Worked example: what does the lower rate actually save?
Imagine borrowing $20,000 over five years. These are hypothetical loans, not lender offers or current PLF rates. Both repay the full balance through monthly instalments with no balloon.
| Cost | Secured example | Unsecured example |
|---|---|---|
| Interest rate | 8% p.a. | 11% p.a. |
| Upfront fee, paid separately | $300 | $0 |
| Monthly fee | $8 | $0 |
| Monthly payment including fee | About $413.53 | About $434.85 |
| Total interest | $4,331.67 | $6,090.91 |
| Total fees | $780 | $0 |
| Total paid, including principal | $25,111.67 | $26,090.91 |
The secured example costs $979.23 less overall. Its interest saving is larger, but the upfront and monthly fees use up $780 of that difference. The question is whether the remaining saving and other terms justify pledging the asset in your circumstances.
Calculation assumptions
Interest stays at the stated rate. The monthly rate is the annual rate divided by 12; payments are made at month-end. The $300 fee is paid from cash and is not financed. Totals use unrounded repayments, so multiplying the displayed monthly figure may differ by a few cents. There are no extra, late or missed payments. Insurance, purchase costs and other conditional charges are excluded; include any actual differences in your own comparison. Lender daily-interest calculations and rounding may differ.
Secured car loans: check the vehicle and the purpose
A secured personal loan is not automatically available for every car or every expense. Before committing to a purchase, ask about the car’s age, condition, value, existing finance, seller type, insurance and required documents. Check whether rules apply when the loan starts, when it ends, or both.
For example, CommBank’s secured car-loan page states that its security car must be ten years old or less, have no existing finance owing and be comprehensively insured. These CommBank conditions were checked on 2 October 2026; other lenders have their own rules.
Compare new and used cars using the full purchase budget: price, transfer charges, registration, insurance and immediate repairs. Ask which costs the loan can cover. A product restricted to a vehicle purchase is different from a general loan secured by an asset you already own.
On PLF, choose “Car loan” as the purpose, then compare secured and unsecured results for the same amount and term. Check the product details before assuming that a low headline rate applies to your car. Filtering helps find options; it does not confirm asset acceptance or approval.
Buying privately or buying a used car
First confirm the lender accepts the purchase arrangement and ask how the seller will be paid. If the vehicle has finance owing, obtain clear instructions for settling that debt rather than assuming an informal promise from the seller is enough.
The official Australian Government PPSR search costs $2 online. Search using the correct VIN on the day of purchase or the day before and keep the certificate. It identifies registered security interests and may include available stolen or written-off information.
A PPSR result is not a mechanical inspection, and vehicle-history information may be incomplete or out of date. Arrange appropriate vehicle and registration checks as well. Do not confuse a paid third-party vehicle report with the official $2 search.
Compare flexibility separately from security
“Secured”, “unsecured”, “fixed” and “variable” describe different features. None is a complete fee policy. Ask these questions for both quotes:
- Can I pay extra, and is there a limit or charge?
- What would it cost to close the loan after one or two years?
- Can I redraw extra repayments, and on what terms?
- Is there a balloon or other final payment, and how would I fund it?
- Are fee waivers conditional, and have I met those conditions?
The difference is real: CommBank’s secured fixed-rate car loan allows extra repayments but does not offer redraw, and an early repayment adjustment can apply under its conditions. NAB’s published secured car-loan features include no early payout penalty but also no redraw. Check the specific contract rather than inferring flexibility from the loan type.
Use the fee checklist and comparison-rate guide when checking quotes.
What happens if you cannot repay?
Secured loan: repossession and sale can reduce the debt without clearing it. You may still owe a shortfall, and recovery costs can add to the amount owing. Moneysmart explains repossession and remaining debt. Consider how losing the car would affect your work, family and ability to earn.
Unsecured loan: the absence of a pledged asset does not cancel the debt or stop collection and possible legal action. Read Moneysmart’s debt-collection guidance if someone contacts you about a debt.
If repayments become difficult, contact the lender early about hardship assistance. If a default or legal notice arrives, act promptly. The National Debt Helpline offers free support on 1800 007 007.
Which type is better for your situation?
Use these questions to organise the decision:
- Does the product fit? Confirm your purpose, proposed asset, amount and term are accepted.
- What is the genuine saving? Compare the actual quotes over the same term, including fees and any final payment.
- Can your budget handle it? Leave room for running costs and foreseeable changes.
- How important is the asset? Consider the practical consequences of losing it, not only its resale value.
- Does the repayment plan fit? Check early payout and extra-payment terms if you expect to pay faster.
If neither repayment works comfortably, revisit the purchase budget or timing before choosing between loan structures. Offering security does not make an unaffordable repayment affordable.
Explore secured personal loans and unsecured personal loans, then test the figures in the repayment calculator.
Common questions
Are secured loans always cheaper?
No. Compare your offered rate, applicable fees, term and total payable. The worked example shows how fees reduce a lower rate’s saving; a different fee schedule or personal quote could change the result.
Can I buy a used car with an unsecured personal loan?
Yes, if the lender permits that purpose and approves your application. The car is not pledged under that unsecured loan, but you should still check its condition, ownership and any existing registered security interest before buying.
Is a secured loan easier to get with poor credit?
Security is one consideration, not an approval shortcut. The lender still assesses your finances, credit history and product fit. See the eligibility guide before applying.
Can I sell the car before repaying a secured loan?
Contact the lender first for a payout figure and the process for releasing its security. Do not assume you can sell the car and keep the loan unchanged. If the sale price is below the payout amount, ask how the difference must be covered.
Sources
- NAB: secured and unsecured personal loans
- CommBank: secured car-loan conditions
- NAB: personal-loan eligibility and features
- Australian Government PPSR: used-car searches
- Moneysmart: repossessed cars and remaining debt
- Moneysmart: dealing with debt collectors
- Moneysmart: financial hardship
- National Debt Helpline
General information only. Requirements, rates and fees depend on the lender, product and your circumstances. Editorial policy · How we compare · How we are paid