What is a comparison rate?

What does comparison rate mean, and how can it help you work out the true cost of a home loan? We explain how comparison rates work – and how they sometimes don't help at all.

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A comparison rate is a percentage rate that all lenders must display by law, next to their advertised interest rates. It's a rate that takes into account most of the fees and charges of a home loan, and it's designed to give you a more accurate representation of a loan's true cost once all of the fees, charges and costs are taken into account.

Compare mortgages by interest and comparison rates

Comparison rates were made mandatory in an attempt to stop lenders from advertising very low interest rates that lured unsuspecting borrowers into loans that actually cost them far more in the long run. For instance, a lender might have advertised a low mortgage interest rate of 2.5%, but then charged $20 per month in account keeping fees and an annual $400 loan package fee. Once these expenses are added in, the loan could be more expensive than a different bank that was charging 2.6%, but with no fees.

A comparison rate on a home loan is legally mandated to be calculated based on:

  • An example loan of $150,000
  • A loan period of 25 years
  • A principal and interest loan

What's the difference between the interest rate and comparison rate?

The interest rate is the percentage of interest that you will be charged on your loan. If your loan is $500,000 and the interest rate is 2.75%, you will be charged interest of around $13,750 in the first year of having the loan.

However, the interest rate you are charged doesn't consider all of your costs. There are other costs that your lender may charge, such as:

  • Account keeping fees
  • Annual package fees
  • Loan switch fees (when you move between variable and fixed rates)
  • Rate lock fees (when you are first obtaining a loan)
  • Government fees and charges

The comparison rate is a percentage amount that is calculated by adding together the interest rate, plus any additional fees and charges that may apply to the loan. The total figure is then converted into a percentage rate to highlight the true cost of the loan.

Lenders are unable to hide any fees, charges or other costs, as these are reflected in the overall comparison rate.

How do you calculate the comparison rate?

If the comparison rate you're given isn't reflective of your loan amount or your preferred loan term, it is possible to calculate this yourself. The comparison rates are actually calculated using a formula that is governed by the Uniform Consumer Credit Code (UCCC).

The calculation is not simple, so you may find that using a good comparison rate calculator, such as our calculator below, will make this easier for you. Before you begin, you will need the following information:

  • Loan amount
  • Loan term
  • Repayment frequency
  • Interest rate
  • Monthly account fee (if any)
  • Annual fee (if any)
  • Establishment fee (if any)
  • Valuation fee (if any)
  • Mortgage documentation fee (if any)
  • Settlement fee

When you have all this information, you're able to enter it into the comparison rate calculator and reach a percentage rate that more accurately displays the real cost of a home loan.

How do lenders calculate the comparison rate?

The comparison rate is calculated using a formula that takes into account a number of items. These include:

Interest rate

The actual interest rate charged by the bank for your home loan is the major factor in calculating the comparison rate.

Fees and charges

Many lenders charge a monthly account fee for their mortgage accounts. Some might charge an annual package fee. Some may also charge an establishment fee, valuation fee, mortgage documentation fee and settlement fee. These charges need to be taken into account when calculating the comparison rate, as they do affect the overall cost of the loan.

Loan term

When it comes to calculating comparison rates, a longer loan term will mean a higher comparison rate. If you see a comparison rate calculated over 25 years, ask to have it reworked to reflect a 30-year term, if this is how long you intend your mortgage to be set for.

Loan amount

The actual loan amount will also be a factor in calculating the comparison rate. Some banks actually offer discounted interest rates on larger loan amounts, so the comparison amount may actually be lower for a bigger loan amount.

Payment frequency

The interest on your mortgage is calculated on the outstanding balance every day. This means that paying your repayments more frequently will actually reduce the balance on a more regular basis, which can reduce the overall comparison rate.

What isn't included in the comparison rate?

Multiple factors are taken into consideration in an effort to reveal the true cost of a loan and arrive at a comparison rate. Unfortunately, there are some costs that won't be included in the calculations, even though they are costs that can affect how much your mortgage costs overall. These include:

  • Break costs or early termination fees
  • Deferred establishment fees
  • Redraw fees

Why the comparison rate isn't a good comparison anymore

Back when comparison rates were introduced in July 2003, these figures made much more sense. Today, the average loan size is much more than $150,000: the latest stats put the current average loan size closer to $500,000.

The average loan term for the majority of borrowers is also 30 years, not 25 years. This is why advertised comparison rates may not be especially helpful when you're working out your true loan costs.

It's important to be aware of this when looking at the comparison rate, because if your loan is more than $150,000, the comparison rate won't be a true reflection of the actual costs of your loan. Changing the terms or length of a loan can have a significant impact on the loan's comparison rate. With this in mind, it pays to generate your own comparison rate for your expected borrowing amount, with the lenders you're considering. The advertised comparison rate can be a helpful tool when you're considering home loans, but if you don't take the time to dig a bit deeper, you could end up paying thousands of dollars more.

Name Product Interest Rate (p.a.) Comp. Rate^ (p.a.) Application Fee Ongoing Fees Max LVR Monthly Payment
Westpac Fixed Option Home Loan Premier Advantage Package
3.48% p.a.
$395 p.a.
Up to $3,000 refinance cashback.
Lock in a low fixed rate for 2 years and buy your home with a 5% deposit. Eligible borrowers refinancing $250,000 or more can get up to $3,000 cashback. Other conditions apply.
UBank UHomeLoan Fixed
2.31% p.a.
$0 p.a.
Limited time offer.
Fix your mortgage for 1 year with a very competitive rate and no ongoing fees. Apply by 30 June 2021 and settle within 90 days to get this low rate.
HSBC Fixed Rate Home Loan Package
2.86% p.a.
$390 p.a.
$3,288 refinance cashback offer
Lock in a low fixed rate for 2 years and buy your home with a 20% deposit. Eligible refinancers borrowing $250,000 or more can get a $3,288 cashback. Terms and conditions apply.
St.George Fixed Rate Advantage Package
3.40% p.a.
$395 p.a.
Up to $4,000 refinance cashback
Borrowers with 20% deposits or equity can get this competitive fixed rate loan. Refinancers borrowing $250,000 or more can get up to $4,000 cashback (Other terms, conditions and exclusions apply).
Athena Variable Home  Loan
1.99% p.a.
$0 p.a.
Owner occupiers with 40% deposits or equity can get this competitive variable rate loan. No upfront or ongoing fees.