TL;DR — Key takeaways
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Most people comparing home loan rates start in the wrong place. They find the lowest number on a rate table, assume that loan is the best deal, and either apply directly or rule out everything above it. That approach sounds logical. It’s also how borrowers end up in loans that cost them more than they needed to pay.
Knowing how to compare home loan rates properly takes about ten minutes to learn and can save you tens of thousands of dollars over the life of a loan. This guide covers what to actually look at, what most borrowers miss, and how to figure out which loan is genuinely right for your situation.
Start here: the difference between the interest rate and the comparison rate
Every home loan in Australia has two rates displayed: the interest rate and the comparison rate. They are not the same number, and the gap between them matters.
The interest rate is the base rate applied to your outstanding loan balance. It determines your regular repayment amount. The comparison rate takes that base rate and adds most fees and charges — application fees, ongoing account fees, and similar costs — to give you a single annual percentage that better reflects the true cost of the loan. Under Australian law, as outlined by ASIC, lenders must display the comparison rate whenever they advertise an interest rate.
Why the gap matters
| Loan A | Low advertised rate, high fees — comparison rate is noticeably higher |
| Loan B | Slightly higher advertised rate, minimal fees — comparison rate is close to the base rate |
Use Rateseeker’s comparison rate calculator to see the true cost of any loan before you apply.
When comparing two loans, always compare their comparison rates — not just the headline figures. A loan that looks cheaper on the rate card can easily be more expensive in practice once fees are factored in.
Fixed vs variable: which rate type should you compare?
Before you can compare rates meaningfully, you need to decide whether you’re comparing fixed loans, variable loans, or both. They serve different purposes and the right choice depends on your situation.
The rate comparison between a fixed and a variable loan is only meaningful if you’re actually deciding between them. For a full breakdown, see Rateseeker’s article on fixed vs variable home loans.
What else to compare beyond the rate
The rate is one number. Whether a loan is actually right for you depends on several others. Here’s what gets missed in most rate comparisons.
Offset account
An offset account links to your loan and reduces the interest-bearing balance daily. If you keep savings in an offset, you’re reducing the interest you pay without losing access to the money. Not all loans offer one, and some charge a fee for the feature. Use Rateseeker’s offset account calculator to see what a balance in offset would save you on your loan.
Extra repayments and redraw
Variable loans typically allow unlimited extra repayments without penalty. Fixed loans often cap them. If you plan to pay down your loan faster or want to access those extra payments later via redraw, check whether your target loan actually allows it and what restrictions apply. Use Rateseeker’s home loan repayment calculator to model different repayment scenarios.
Ongoing fees
Monthly or annual account-keeping fees are captured in the comparison rate but it’s worth seeing them as a separate line item. A $395 annual fee on a loan held for 30 years is nearly $12,000 over the life of the loan before any interest effect is considered.
Exit flexibility
Variable loans can generally be refinanced or discharged at any time without a penalty. Fixed loans charge a break cost if you exit during the fixed term — this can be substantial if interest rates have moved significantly since you locked in. If there’s any chance you’ll sell, refinance, or pay out the loan within the fixed period, this matters.
The right comparison depends on how you plan to use the loan
A borrower who keeps $50,000 in an offset account gets enormous value from a loan with a full offset. A borrower who pays the minimum and holds the loan for 30 years benefits more from the lowest possible comparison rate. The “best” loan is different for each of them, even if the rate on offer is identical.
The most common mistakes borrowers make when rate shopping
Most of the errors in rate comparisons come from the same handful of habits.
- Comparing the headline rate only. The interest rate is not the cost of the loan. The comparison rate gets you closer, and the combination of rate, fees, and features gets you there entirely.
- Using rate tables that show a single lowest rate. Most published rate tables show a lender’s absolute lowest rate, which typically applies to a very specific loan size, LVR, and borrower type. The rate you’re actually offered may be meaningfully higher.
- Ignoring your LVR. Lenders price their rates in tiers based on your loan-to-value ratio. A borrower at 70% LVR and a borrower at 90% LVR will not be offered the same rate, even from the same lender for the same loan product.
- Applying to multiple lenders to compare. Every time a lender runs a credit check, it leaves a mark on your credit file. Multiple applications in a short window can affect your credit score and how subsequent lenders view your application. Compare first, then apply once to the right lender.
- Not accounting for your loan purpose. Owner-occupied loans and investment loans are priced differently by most lenders. Principal and interest versus interest-only repayments also affects your rate. Make sure you’re comparing equivalent loan types.
Why comparing through a broker gives you a more accurate result
A rate table tells you what a lender is currently advertising. A broker tells you what you would actually be offered, based on your income, deposit, LVR, loan purpose, and credit profile — across 40 or more lenders at once.
That distinction matters. The rate on the lender’s website is a marketing number. The rate in your loan offer is the real one. A broker narrows the gap between those two figures by matching your profile to the lenders whose policies and pricing suit your situation. According to the MFAA, brokers now write around 74% of all new residential home loans in Australia — and borrower access to broader lender comparisons is a significant reason why.
Self-comparing on rate tables also carries the risk of triggering multiple credit enquiries if you apply to several lenders to see what you’re offered. A broker does a single, structured assessment and applies to the right lender the first time. For more on what to look for in a broker, see our guide to mortgage brokers in Sydney. For further guidance on comparing loans, MoneySmart offers a reliable independent overview of what to consider.
Don’t apply to multiple lenders to “test” your options
Each lender credit enquiry is recorded on your file. Multiple enquiries in a short period signal to lenders that you’ve been shopping around and may have been declined elsewhere. Use Rateseeker’s comparison rate calculator to model your options, then let a broker identify the right lender before you apply.
Compare home loan rates the right way. Run your numbers through our comparison rate calculator, then speak to a Rateseeker broker who compares across 40+ lenders based on your actual situation. Comparison Rate Calculator |
Frequently asked questions
The interest rate is the base rate charged on your outstanding loan balance. The comparison rate includes the interest rate plus most fees and charges, expressed as a single annual percentage. It gives a more accurate picture of the total cost of the loan. Australian lenders are legally required to display the comparison rate alongside the advertised rate.
Not necessarily. A loan with a very low advertised rate may carry high fees, offer no offset account, cap extra repayments, or charge a break fee if you exit early. The comparison rate and the loan’s features together give a more accurate picture of value than the headline rate alone. Use Rateseeker’s comparison rate calculator to compare the true cost of different loans.
The best rate depends on your borrower profile: your income type, deposit size, LVR, loan purpose, and how long you plan to hold the loan. A mortgage broker compares options across multiple lenders based on your specific situation rather than listing generic lowest rates. This produces a comparison that reflects what you would actually be offered.
No. Every credit enquiry from a lender is recorded on your credit file. Multiple enquiries in a short period can affect your credit score and make subsequent lenders more cautious. The better approach is to compare using a calculator and work with a broker who can identify the right lender and apply once, correctly.