Chop $77,000 off your mortgage

article header

Cropping almost five years, and about $77,000, off your home loan may be as simple as increasing your repayment frequency from once per month to fortnightly. But the amount you save will depend entirely on your lender and their method of calculating interest.  

That’s because lenders may credit you with 24 payments per year, which is twice per month, or 26 payments per year when calculated fortnightly, according to RateCity research.

Damian Smith, chief executive of RateCity, says the research revealed that of the major four banks Commonwealth Bank’s method for calculating interest offered the best savings for fortnightly repayments.

“It’s possible to get big savings by paying your mortgage fortnightly rather than monthly – but it really depends on the lender,” he says.

How the big four do it

ANZ, Commonwealth Bank and NAB calculate fortnightly payments by dividing a monthly payment by two. However, ANZ and NAB debit 24 fortnightly payments per year, or two payments per month, while Commonwealth Bank credits payments every two weeks. So Commonwealth Bank customers make 26 payments in a calendar year and therefore get credit for two additional fortnightly payments each year.

Those with Westpac home loans are charged 26 payments per year. However, the repayments equal the same amount as monthly repayments would, so borrowers aren’t paying any more each year by increasing repayment frequency. They do save on interest because they pay part of the principal off sooner each month.

In dollar terms, a Commonwealth Bank customer with a $300,000 mortgage at 7.30 percent over 25 years could save almost $77,000 in interest and reduce their loan by almost five years by making fortnightly repayments rather than paying monthly.

“Using the same scenario, Westpac borrowers could save almost $7,000, but ANZ and NAB customers would save less than $400 over 25 years,” says Smith.

A boost for borrowers  

But no matter who you bank with, most borrowers can still significantly reduce debt more quickly by using an offset account, switching to a cheaper home loan or by accelerating repayments, for instance.

You may only need to find a couple of extra hundred dollars each month to put a dent in your mortgage, AMP financial planner Dianne Charman told

“If the person was to also boost repayments by $180 a fortnight, it would shave 10 years off the mortgage,” she was reported to say.

To calculate how much you could save by switching the repayment schedule on your mortgage or by upping the amount you pay use RateCity’s new home loans calculator or contact your lender.


^Words such as "top", "best", "cheapest" or "lowest" are not a recommendation or rating of products. This page compares a range of products from selected providers and not all products or providers are included in the comparison. There is no such thing as a 'one- size-fits-all' financial product. The best loan, credit card, superannuation account or bank account for you might not be the best choice for someone else. Before selecting any financial product you should read the fine print carefully, including the product disclosure statement, fact sheet or terms and conditions document and obtain professional financial advice on whether a product is right for you and your finances.

Compare your product with the big 4 banks, or add more products to compare
As seen on