Offset calculator

Use Finder's offset account calculator to see how you could pay less interest and own your home outright sooner, without spending an extra cent.

Key takeaways

  • An offset account is an account that's attached to a home loan which can be used like a normal transaction account.
  • For every dollar that's in the offset account, it reduces the value of the loan you have to pay interest on.
  • You can use a calculator to see how much money you'd save over the life of your loan with different amounts in your offset.

Home loan offset calculator

*Please note that the calculator provides an estimate of your potential offset savings only. The calculator does not take into account various details such as loan fees or changes to your interest rate.

Using the offset calculator

Finder's home loan offset calculator is simple to use. If you already have a home loan then input your interest rate and loan amount.

If you don't have a home loan yet, use your best estimate (and compare home loans to find a reasonable interest rate to use as an example).

  • Loan term and loan amount. Enter the total amount you've borrowed and the length of the home loan. If you don't have a loan yet, put in 30 years and an estimated amount.
  • Interest rate. Put in your current interest rate or an estimate if you're not sure.
  • Repayment frequency. Your repayment frequency is either weekly, monthly or fortnightly. This part of the calculator refers to your regular repayments and not any offset payment.
  • Offset amount. Enter the amount of money you're planning to save in the offset account as a single sum.
  • Offset starts at year. If you currently have a home loan, how long have you had it for? If you're 4 years into your home loan, put 4 years. If you don't have a home loan yet and are planning to save money in the offset account from day one, put 0 years.

Here's a helpful example to show you how it works.

Offset savings example calculation

Let's say you are 3 years into a 30-year, $500,000 home loan with a 100% offset account, which you haven't yet added any savings to. You have built up some money in a seperate savings account, earning around 4% interest, and you want to see if an offset account will help you.

You enter your loan details into the offset calculator:

  • Loan amount: $500,000
  • Loan term: 30 years
  • Interest rate: 5.80%
  • Offset (savings) amount: $25,000
  • Start offset at year: 3
  • Results: You will repay your home loan 2 years and 5 months early and save $84,124.59 in interest

The $25,000 savings results in you paying $84,124.59 less in interest. Instead of paying this in interest, this money will go towards your loan principal. If you add more money to the offset account over time, this saving will increase.

How much Aussies have in offset accounts
The latest APRA figures show that Australians have $307.6billion in their offset accounts. This is a 13% increase year-on-year.

How do home loan offset accounts work?

A home loan offset account acts like a normal bank account but it's attached to your home loan. And instead of earning you interest, the money in the offset account saves you in interest charges.

It works by offsetting the loan principal (the money you are repaying). For example, if you have $400,000 on your home loan and $20,000 in an offset account, then your lender sees this as a $380,000 loan principal. Thus, you are charged less in interest.

Your repayments won't change month to month with that $20,000 saved in offset. Instead, you will pay less in interest and pay more off the loan principal, meaning you repay the loan faster.

You can withdraw and spend the money in your offset account if you need to. This will reduce the amount of interest you avoid paying, but it gives you more control over your money to spend in emergencies.

Rebecca Pike's headshot
Our expert says: Top up your savings

"While the offset account calculator can provide a quick estimation of how much you might be able to save, there are other factors to consider.

For instance, your savings will fluctuate depending on the interest rate you have at the time. It also doesn't take into account whether you withdraw from the account or add money in. Use the calculator as a starting point, but you should always make sure you're adding into the account as much as possible to increase those savings as much as possible."

Rebecca Pike's headshot
Editor, Money

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Senior Money Editor

Richard Whitten is Finder’s Senior Money Editor, with over eight years of experience in home loans, property, credit cards and personal finance. His insights appear in top media outlets like Yahoo Finance, Money Magazine, and the Herald Sun, and he frequently offers expert commentary on television and radio, helping Australians navigate mortgages and property ownership. Richard started his career in education and textbook publishing in South Korea. He holds multiple industry certifications, including a Certificate IV in Mortgage Broking (RG 206) and Tier 1 and Tier 2 certifications (RG 146), as well as a Bachelor of Education from the University of Sydney and a Graduate Certificate in Communications from Deakin University. See full bio

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2 Responses

    Default Gravatar
    KereMarch 26, 2019

    If you want to offset your loan, how can you work out the amount you will pay..?

      Default GravatarFinder
      JohnMarch 27, 2019Finder

      Hi Kere,

      Thank you for reaching out to Finder.

      If you’re considering an offset mortgage, use an offset mortgage calculator to see if you this might be a viable option for you once you have all the variables in hand. You would need the following information to estimate this:

      Loan amount. The loan amount refers to the amount of money you have borrowed or plan to borrow.
      Loan term. The loan term is the amount of time you have to repay the loan.
      Interest rate. The interest rate is the annual percent at which you repay the loan, which can be fixed or variable.
      Repayment frequency. The repayment frequency is the interval in which you make your repayments and is generally monthly, fortnightly or weekly.
      Offset account information. The offset account balance is the amount you have in your offset account while the ‘start after’ date is the time that has elapsed on the loan before the offset account is used.

      If you’d like more professional advice regarding this matter you can compare mortgage brokers in your area and get in touch with one for help today. Hope this helps!

      Cheers,
      Reggie

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