Australia's Free Mortgage Offset Calculator

Pay Off Your Home
Years Earlier Than You Think

See exactly how your offset account saves you interest โ€” and find the fastest path to mortgage freedom.

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$127k
Avg. Interest Saved
8.4 yrs
Avg. Time Saved
Free
Always & Forever
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Our Free Calculators

Everything you need to plan your mortgage payoff strategy.

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Most Popular
Offset Calculator

See exactly how your offset account reduces interest and cuts years off your loan.

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Essential Tool
Repayment Calculator

Find out exactly what your monthly repayments will be and how extra payments save you money.

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Save Thousands
Refinance Calculator

Should you refinance? See the break-even point and total savings from switching lenders.

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How an Offset Account Works

The simplest wealth-building tool most Australians underuse.

1

Your savings sit in offset

Instead of a regular savings account, your money lives in an offset account linked to your mortgage.

2

Interest on the difference only

The bank only charges interest on your loan balance minus your offset balance โ€” saving you money every single day.

3

More of each payment hits principal

Less interest means more of every repayment reduces your actual loan โ€” compounding your savings over time.

Learn More

Practical guides for Australian homeowners.

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Strategy
The Offset Account Strategy That Saves Australians $100k+
Most homeowners set and forget their offset. Here's the active strategy that genuinely accelerates payoff.
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Refinancing
Cash-Out Refinance + Offset: The Smart Australian Playbook
How to use a cash-out refinance and why parking it in offset beats almost every alternative.
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Investing
Pay Off Mortgage vs Invest: The Australian Tax Angle
The maths behind whether to invest your savings or reduce your mortgage โ€” with Australian tax rates.
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Planning
How to Pay Off a $700k Mortgage in 10 Years
A step-by-step case study with real numbers โ€” including the offset crossover strategy.
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Frequently Asked Questions

The questions we get asked most.

Should I pay a lump sum off my mortgage or keep it in offset?
Keep it in the offset. The interest saving is identical, but the offset gives you full access to your money if an emergency arises. Once you pay a lump sum off the loan, it's locked away and you'd need to refinance to access it again.
What happens when my offset balance equals my loan balance?
You pay zero interest. Every single dollar of your monthly repayment goes directly to reducing the principal. You can then withdraw the offset funds, pay the loan off entirely, and own your home outright.
Is the interest saved on an offset account tax-free?
Yes โ€” you're not earning interest (which would be taxable), you're simply reducing the interest you're charged. The saving is effectively tax-free, making the offset rate much higher than a savings account after tax.
Does this calculator work for all Australian lenders?
Yes โ€” it uses standard principal and interest amortisation with an offset deduction, applying to all major lenders including CBA, ANZ, Westpac, NAB and Macquarie. Always verify exact figures with your lender.