Home Loan Offset Calculator
Home Loan Offset Calculator Work Out Your Real Interest Savings
This home loan offset calculator estimates how much interest you could save and how long you could cut from your mortgage by holding savings in an offset account. Enter your loan amount, interest rate, term, and offset balance to see your repayment, interest saved, and time cut from your loan.
These figures are estimates only, not a loan offer. Actual outcomes depend on your lender’s product, fees, and how your offset balance changes over time.
What an Offset Account Actually Does
An offset account is a transaction account linked to your home loan, sometimes called a mortgage offset account, where the balance reduces the loan amount interest is calculated on. If you owe $400,000 and hold $20,000 in your offset, interest is charged on $380,000 instead.
The loan balance itself doesn’t change. What changes is the interest you pay each month, so more of your repayment goes toward the principal. Used consistently, this home loan offset calculator shows the effect can save tens of thousands of dollars and shorten your loan by years.
How to Use the Calculator
This offset account calculator only needs four numbers for a useful estimate:
Loan amount. Your current balance or the amount you plan to borrow
Interest rate. Your current rate, or an indicative rate if comparing lenders
Loan term. The remaining term, typically 25 or 30 years
Offset balance. The average amount you expect to hold
The home loan offset calculator returns your monthly repayment, total interest saved, and the revised loan term, with a chart showing your balance falling faster once the offset is applied.
How ADA Financial Services Can Help
ADA Financial Services compares home loan products with offset accounts across our lender panel, weighing total cost rather than the headline rate. An offset product with a slightly higher rate can still work out cheaper if you hold a meaningful balance, and a basic loan can be the better fit if your balance is small. We model your home loan interest savings before recommending anything.
We assess your full position, compare lenders on rate and offset functionality, and our fee is paid by the lender at settlement in most standard cases, disclosed in writing before any application proceeds. As ADA Financial Services’ home loan calculator, this tool is just the start, speak with a specialist for the full picture.
Want to know whether an offset account suits your loan?
Speak with an ADA Financial Services specialist about your home loan options. We compare lenders, model the offset benefit against the cost, and give you a clear picture of what makes sense for your situation.
This is general information only and does not constitute financial or credit advice. Speak to a licensed broker for advice tailored to your situation.
FAQs
Is an offset account worth it on a home loan?
Generally yes, when the interest saved is greater than any extra fee or rate premium on the loan. The bigger your loan and average offset balance, the more it works in your favour. Use the home loan offset calculator above for your specific numbers.
Does the offset balance count as a repayment?
No. It reduces the interest calculated on the loan, not the loan principal. Your monthly repayment stays the same, but more of it goes toward the principal because less goes to interest.
Is an offset account better than making extra repayments?
Both reduce interest paid. An offset keeps funds accessible as savings, while extra repayments reduce the balance directly. For investment properties, an offset often preserves interest deductibility more cleanly. Speak with your accountant about your situation.
Will using an offset account affect my borrowing capacity?
Not in itself. Lenders assess borrowing capacity on income, expenses, and existing debts, not on whether an offset is attached.
What This Loan Repayment Calculator Shows
This loan repayment calculator estimates what you will pay each month on a home loan, how much of that payment goes to interest versus principal, and the total interest charged across the full term. You enter your loan amount, interest rate, term, and repayment frequency. The output gives you a clean repayment figure to plan around and a total cost number that most borrowers underestimate.
The estimate is based on the inputs you provide and assumes a standard principal and interest loan with a constant interest rate. Real loans vary as rates move and fees apply. Treat the output as a planning figure, not a loan offer.
What This Loan Repayment Calculator Shows
This loan repayment calculator estimates what you will pay each month on a home loan, how much of that payment goes to interest versus principal, and the total interest charged across the full term. You enter your loan amount, interest rate, term, and repayment frequency. The output gives you a clean repayment figure to plan around and a total cost number that most borrowers underestimate.
The estimate is based on the inputs you provide and assumes a standard principal and interest loan with a constant interest rate. Real loans vary as rates move and fees apply. Treat the output as a planning figure, not a loan offer.