Unlock the secrets to offset accounts and loan interest

An offset account is a transaction account linked to your home loan that reduces the interest you pay.

Every dollar sitting in the offset account reduces the loan balance used to calculate daily interest. If you have a $450,000 loan and $25,000 in your offset, you pay interest on $425,000. The account functions like an ordinary transaction account for wages, bills and everyday spending, but the balance works in the background to cut your interest cost.

How Daily Interest Calculation Works with an Offset Account

Most variable rate home loans calculate interest daily and charge it monthly. The lender takes your outstanding loan balance at the end of each day, subtracts your offset account balance, and applies the daily interest rate to the difference.

Consider a secondary teacher with a $380,000 variable rate loan at 6.2% per annum and $18,000 in an offset account. Interest is calculated on $362,000 each day. Over a full year, that $18,000 offset balance saves around $1,116 in interest compared to holding the same money in a separate savings account taxed at the teacher's marginal rate. The actual saving depends on how long the balance stays in the offset and whether it fluctuates during the month as wages come in and expenses go out.

Does an Offset Account Cost More in Interest Rate or Fees

Some lenders charge a higher interest rate on loans with an offset account attached, others charge an annual package fee, and some offer the feature at no additional cost.

A loan with a 100% offset might carry a rate 0.15% to 0.30% higher than a basic variable loan without the feature. On a $400,000 loan, a 0.20% rate increase costs around $800 per year. If you consistently hold $15,000 or more in the offset, the interest saved typically exceeds the rate premium. If the account sits near zero most of the time, you pay more for a feature you're not using. Package fees range from $200 to $395 per year and often include other features like fee waivers on additional loans or credit cards. The value depends on whether you use those extras.

Offset Accounts on Fixed Rate Loans

Most fixed rate loans do not include a 100% offset account. Some lenders offer a partial offset, typically reducing the loan balance by only 40% to 60% of the account balance for interest calculation purposes.

If you're splitting your loan between fixed and variable portions, you can attach a full offset to the variable portion only. A primary school principal might fix $300,000 for rate certainty and leave $150,000 on a variable rate with an offset attached. Income and savings sit in the offset and reduce interest on the variable portion, while the fixed portion remains unaffected. That structure works when you want some protection from rate rises but still want the flexibility and interest saving that comes with an offset. You can learn more about loan structures through a mortgage broker for teachers who works with educator clients regularly.

When Multiple Offset Accounts Make Sense

Some lenders allow you to link more than one offset account to the same loan. The balances are combined when calculating your daily interest.

This works for households managing separate income streams or saving for specific goals. Two educators might each keep their salary in separate offset accounts linked to the same home loan, or one account might be used for daily spending while another holds savings quarantined for school holiday travel or a car replacement. The combined balance offsets the loan. Not all lenders offer multiple offsets, and some cap the number at two or three accounts. Check whether the lender charges for additional accounts.

Offset Account vs Redraw Facility

A redraw facility lets you make extra repayments on your loan and withdraw them later if needed. An offset account keeps your money separate from the loan.

Both reduce the interest you pay, but they work differently. With redraw, your extra payments reduce the loan balance directly. You then apply to redraw those funds when you need them, and the lender may take a few days to process the request or charge a fee. Some lenders also restrict or remove redraw access if your circumstances change. With an offset, your money stays in your own account. You have immediate access through a debit card, online transfer or ATM without needing lender approval. If you value access and control, an offset is the better option. If the loan product you want doesn't include an offset, redraw provides a partial alternative. Many home loans for teachers include both features on variable rate products.

Should You Hold Emergency Savings in an Offset or Elsewhere

Holding savings in an offset account typically delivers a higher effective return than a standard savings account after tax.

If your home loan rate is 6.2% and your offset balance reduces the interest charged on that amount, you're effectively earning 6.2% on those funds without paying tax on the return. A savings account paying 4.5% interest is taxed at your marginal rate. For an educator on a marginal tax rate of 32.5%, the after-tax return is around 3.0%. The offset delivers more than double the effective benefit. The offset also maintains full liquidity. Your emergency savings remain accessible without notice periods, withdrawal limits, or monthly deposit requirements that some high-interest savings accounts impose.

How Offset Accounts Affect Borrowing Capacity and LMI

Lenders assess your borrowing capacity based on your income, expenses, and ability to service the loan at a buffered interest rate. The offset account itself doesn't increase the amount you can borrow, but the savings pattern it reveals can support your application.

If you've been holding a consistent offset balance over several months, it demonstrates genuine savings and disciplined spending. Lenders look for evidence that you can manage loan repayments and still accumulate funds. An offset account statement showing regular income and controlled outgoings strengthens that case. For educators accessing LMI waivers for teachers, the offset account balance may contribute to the deposit or be counted as genuine savings depending on the lender's policy and the time the funds have been held.

Offset Accounts and Investment Loans

When you use an offset account on an investment loan, the interest saved is not tax-deductible, but the strategy still works in your favour.

Investment loan interest is deductible against rental income and other assessable income. If you make extra payments directly onto an investment loan, you reduce the deductible interest and lose that tax benefit. By holding funds in an offset instead, you reduce the interest charged without reducing the loan balance. The full loan amount remains in place, and the maximum deductible interest is preserved. You still pay less interest out of pocket because the offset reduces the daily calculation, but your deductions are not affected. This approach is commonly used by educators building a property portfolio and is sometimes integrated into a debt recycling strategy where investment debt is maintained while non-deductible debt is paid down.

Choosing a Loan Product with or without an Offset

Not every borrower needs an offset account, and paying extra for the feature when you won't use it adds cost without benefit.

If you're living pay to pay with minimal surplus each month, a basic variable rate loan without an offset or package fee will cost you less. If you reliably hold a buffer in your transaction account, receive regular overtime or casual income, or save toward short-term goals while paying off your home, an offset account will likely save you more in interest than it costs in fees or rate premium. Run the numbers based on the balance you actually expect to maintain, not the balance you'd like to maintain. Your mortgage for teachers should match how you manage money in reality, not in theory.

Call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions