A dealer offered us “0% interest” on a $45,000 SUV. Sounds amazing, right? We did the maths. That “free” loan actually cost thousands more than financing through a bank — because the dealer inflated the car price to absorb the interest cost. Here's how the trick works, and how to avoid it.
We compared 15 car loan providers across three channels: dealer finance, big-four banks, and online lenders. The rate differences are significant, but the real story is in the fees and fine print that nobody reads until it's too late.
Every lender in this guide is available to Australian borrowers with an Australian Credit Licence. We're not selling you a loan — we're showing you where the money goes so you can negotiate from a position of strength.
The Three Channels Compared
Dealer Finance
- Rate: 5–12% typical
- Fees: $500–$1,500 origination
- Pros: Convenient, one-stop shop
- Cons: Hidden fees, “0% deals” inflate car price, pressure to add insurance products
- Approval: Same day
Bank / Credit Union
- Rate: 6–8% typical
- Fees: $0–$350 establishment
- Pros: Trusted, pre-approval gives negotiating power
- Cons: Slowest approval (2–5 business days)
- Approval: 2–5 days
Online Lender
- Rate: 5–9% typical
- Fees: $0–$495
- Pros: Fastest approval, lowest fees, fully digital
- Cons: No face-to-face, some secured-only
- Approval: Same day (often hours)
Rate Comparison: 15 Lenders
Secured car loan rates for a $30,000 new car over 5 years. The comparison rate includes fees — that's the number that actually matters.
| Lender | Type | New Car | Used Car | Comparison | Monthly Fee | Estab. Fee |
|---|---|---|---|---|---|---|
| Plenti | Online | 6.49% | 7.49% | 7.12% | $0 | $0 |
| Pepper Money | Online | 6.99% | 7.99% | 7.65% | $0 | $495 |
| Macquarie | Bank | 6.89% | 7.39% | 7.45% | $0 | $0 |
| ANZ | Bank | 7.24% | 7.74% | 7.89% | $0 | $250 |
| Westpac | Bank | 7.29% | 7.79% | 7.95% | $0 | $250 |
| CBA | Bank | 7.49% | 7.99% | 8.15% | $10 | $300 |
| NAB | Bank | 7.49% | 7.99% | 8.12% | $8 | $350 |
| Dealer avg | Dealer | 8.50% | 9.50% | ~10% | varies | $500–$1,500 |
Rates indicative as of March 2026. Comparison rates based on $30,000 secured loan over 5 years. General information only — not financial advice.
The 0% Interest Trick Explained
When a dealer offers 0% interest, the interest is baked into a higher car price. You're paying it either way.
Here's how it works. A dealer has a car with a wholesale cost of $38,000 and a recommended retail of $42,000. Normally, they'd sell it for $40,000–$42,000 depending on negotiation.
But with a “0% finance deal,” they list the car at $45,000 — and absorb the interest cost into that inflated price. You're not getting free money. You're paying $3,000–$5,000 above market value for the car, and losing your ability to negotiate on price.
The Real Comparison
Dealer “0% Finance”
- Car price: $45,000 (inflated)
- Interest: $0
- Total paid: $45,000
- No price negotiation leverage
Pre-Approved Bank Loan
- Car price: $40,000 (negotiated)
- Interest (7% / 5yr): $6,120
- Total paid: $46,120
- Full price negotiation power
The bank loan costs $1,120 more on paper. But if you negotiate the cash price down to $38,500 (realistic with pre-approval leverage), your total becomes $44,620 — $380 less than the “0% deal.” And you're driving the same car.
The key insight: Pre-approval removes the dealer's biggest lever — financing. When you walk in as a cash buyer (with pre-approval), the dealer knows they can't make money on the finance, so they're more likely to negotiate on the car price itself. That's where the real savings are.
Secured vs Unsecured: Which Should You Choose?
Secured Loan
- Rate: Lower (car is collateral)
- Requirement: Must have comprehensive insurance
- Risk: Lender can repossess the car
- Best for: New or near-new cars over $15,000
Unsecured Loan
- Rate: Higher (+1–2%)
- Requirement: No mandatory insurance
- Risk: No asset at risk (but still a legal debt)
- Best for: Used cars under $15,000
The Hidden Cost of Secured Loans on Cheap Cars
For loans under $15,000 on used cars, unsecured often makes more financial sense. Here's why:
- Secured loan rate: 7.5% on $12,000 = $900/year in interest
- Unsecured loan rate: 9.5% on $12,000 = $1,140/year in interest
- Difference: $240/year more with unsecured
- But: Comprehensive insurance on a $12,000 car costs $1,000–$1,500/year (mandatory with secured)
- Third-party only: $300–$500/year (all you need with unsecured)
- Insurance saving: $700–$1,000/year
Net result: Unsecured saves you $460–$760/year despite the higher interest rate. The maths flips for cars worth $20,000+ where comprehensive insurance makes sense regardless.
Our Verdict
- Best overall value: Plenti or Macquarie — competitive rates, zero or low fees, and fast approval. Plenti is fully online; Macquarie gives you a bank behind it.
- Best if you want speed: Plenti — same-day approval, fully digital process, no paperwork posted to your house.
- Best big bank: Westpac or ANZ — competitive and fewer fees than CBA/NAB. Good if you already bank with them and want everything in one app.
- Avoid: Dealer finance — unless you've exhausted negotiation on the cash price first and the dealer's rate genuinely beats your best pre-approval offer (rare).
Pre-Approval Checklist
Walking into a dealership without pre-approval is like playing poker with your cards face up. Here's your preparation checklist.
Pre-approval is the single most powerful negotiating tool when buying a car. Get it before you visit any dealer.
Before You Visit the Dealer
- ✓Get pre-approved from at least one lender BEFORE visiting the dealer. This is non-negotiable.
- ✓Know the car's market value using RedBook, CarsGuide, or carsales.com.au. Print or screenshot the valuation.
- ✓Compare at least 3 lenders — one bank, one online lender, and one credit union. This takes 30 minutes and can save you thousands.
- ✓Check the comparison rate, not just the headline rate. The comparison rate includes fees and gives you the true cost.
- ✓Read the fine print on early repayment fees. Some lenders charge exit fees if you pay off the loan early. Online lenders like Plenti typically don't.
- ✓Factor in comprehensive insurance cost for secured loans. Get insurance quotes before signing — the cost can change whether secured or unsecured makes more sense.
One last thing: Never tell the dealer your monthly budget. They'll use it to stretch the loan term and maximise interest. Instead, negotiate on the total purchase price first, then discuss financing separately. Two separate negotiations, not one.
Sources: Interest rates were quoted via each lender's website for a $25,000 secured car loan over 5 years in February–March 2026. ASIC — MoneySmart car loans guide (moneysmart.gov.au) • RBA — lending rates (rba.gov.au). This is general information only — not financial advice. Always read the lender's terms and conditions. Some of the platforms we've linked to are affiliate partners — if you buy through our links, we might earn a small commission. Doesn't cost you anything extra.