Home Loan Offset
Calculator
See how much interest and time you could save on your home loan by using a 100% offset account. Enter your loan details, model your own offset balance, then talk to a Dark Horse Financial specialist about turning the numbers into a real, tailored home loan solution.
How to Use This Calculator
Four quick steps from a rough idea to a tailored home loan conversation.
Enter Your Loan Details
Add your loan balance, interest rate and years remaining into the calculator above.
Try It Now ↑Add Your Offset Balance
Enter what you have (or plan to keep) in an offset account, plus any regular deposits.
Try It Now ↑See Your Estimated Savings
Instantly see the interest and loan term you could save, without changing your repayment.
Try It Now ↑Talk to a Specialist
Turn the numbers into a real, tailored home loan solution with an offset-enabled lender.
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How Does a Home Loan Offset Account Work?
A 100% offset account is an everyday transaction or savings account linked to your home loan. Instead of earning interest itself, the balance sitting in it is deducted from your loan balance before your lender works out how much interest to charge you each day. Your scheduled repayment usually doesn't change, so the extra amount that would have gone to interest instead reduces your principal faster.
100% offset
Every dollar in your offset account is deducted from your loan balance before interest is calculated.
Calculated daily
Interest is calculated on your reduced balance each day, so the benefit starts from day one.
Stays accessible
Unlike extra repayments, your offset balance stays available to withdraw whenever you need it.
Your Loan Balance Over Time
How your loan balance runs down with and without the offset account you entered above.
Worked Example
What a Modest Offset Balance Could Save
The loan: A $500,000 home loan over 30 years at 6.24% p.a., with repayments of $3,075.33 a month — the same whether or not an offset account is used.
The offset: Starting with $40,000 in an offset account today, plus $300 a month in ongoing deposits.
The result: Roughly $265,000 saved in interest and the loan paid off about 7 years 2 months sooner — without ever changing the repayment amount.
Figures shown are illustrative only, based on the example above. Try the calculator with your own numbers ↑.
Other Ways to Reduce Your Home Loan Interest
An offset account is one of several ways to cut down what you pay in interest — here's how it compares.
Is an Offset Account Right for You?
An offset account tends to make the most sense when:
- You keep a meaningful, fairly stable balance in savings or everyday banking
- You're on a variable rate loan, where full offset accounts are most commonly available
- You want your savings to keep reducing interest while remaining accessible
- You'd rather not lock money away in extra repayments you can't easily get back
- You want to compare how a delayed offset start could affect your interest bill
- You're weighing an offset account against refinancing or restructuring your loan
Potential interest saved in our worked example above, on a $500,000 loan with a $40,000 offset balance. Try your own numbers in the calculator.
Why Use Dark Horse Financial for Your Home Loan?
Broad Lender Access
Compare offset-enabled home loans across a wide panel of bank and non-bank lenders.
Variable & Fixed Options
We help you weigh up offset-enabled variable loans against fixed rate alternatives.
Fast, Clear Advice
Get straight answers about how an offset account would work for your specific loan.
Established & Proven
Trusted by Australian businesses and homeowners since 2013.
Specialist Expertise
Led by a working capital and lending specialist with nearly 15 years' experience.
No-Obligation Assessment
A free initial conversation, with no obligation to proceed.
Frequently Asked Questions
Common questions about home loan offset accounts — answered directly.
The results generated by this calculator are provided for general information purposes only and are based on the information you input. They are indicative estimates only and do not constitute an offer of finance, credit approval, or a formal quote. This calculator does not take into account your personal or business objectives, financial situation, or needs and should not be relied upon as financial, legal, or tax advice. Actual terms, rates, fees, repayments, and eligibility criteria may vary depending on lender assessment and individual circumstances. You should not make any financial decision based solely on these results and we strongly recommend speaking with one of our finance specialists to obtain advice tailored to your specific situation before proceeding.