Offset Accounts Explained

An offset account is a transaction or savings account linked to your home loan. The balance in your offset account reduces the loan balance on which interest is calculated, helping you save on interest costs while keeping your money accessible.

Understanding how offset accounts work and whether they suit your situation helps you choose the right loan structure and maximise your savings over the life of your mortgage.

What Is an Offset Account?

An offset account works like a regular bank account where you can deposit your salary, savings, and other funds. The key difference is that the balance in this account offsets your home loan balance when the lender calculates interest.

For example, if you have a $400,000 home loan and $20,000 in your offset account, you only pay interest on $380,000. The $20,000 sitting in offset effectively reduces the balance used to calculate interest, subject to the terms of the loan.

Most offset accounts are 100% offset accounts, meaning every dollar in the account reduces your loan balance by a dollar for interest calculation purposes. Some lenders offer partial offset accounts, which provide less benefit.

Full Offset vs Partial Offset

Full offset accounts reduce your loan balance dollar-for-dollar when calculating interest. This is generally the most useful type for borrowers who maintain meaningful savings balances.

Partial offset accounts only offset a percentage of your balance. A $30,000 balance in a 50% offset account, for example, only reduces the interest-bearing balance by $15,000.

Always confirm whether an offset account is full or partial before choosing a loan, and compare the benefit against any additional fees or higher interest rate attached to the product.

Many variable home loans offer full offset accounts, while availability on fixed rate loans is more limited. If offset functionality is important to you, this may influence your decision between fixed, variable and split loan structures.

Offset Accounts vs Redraw Facilities

Both offset accounts and redraw facilities help you save on interest, but they work differently and have distinct advantages and limitations.

An offset account keeps your money separate from your loan in a linked transaction account. You can generally access the funds like a normal bank account, subject to the account terms.

A redraw facility allows you to withdraw extra repayments you've made on your loan. The money is technically in your loan, reducing the principal. To access it, you need to request a redraw, and access is subject to your lender's rules.

Key differences:

• Offset funds are held in a separate account; redraw funds are inside the loan
• Offset funds are generally easier to access for everyday spending
• Redraw may have minimum amounts, processing times or other lender conditions
• Both can reduce interest costs when balances are the same, but the access and legal treatment of the funds differ
• For investment loans, using redraw for personal purposes can create tax complications — seek professional tax advice

Who Benefits Most from Offset Accounts?

Offset accounts provide the greatest value to borrowers who maintain healthy savings balances and want flexibility to access those funds while still saving on interest.

High-income earners who accumulate significant savings each month can benefit because every dollar deposited into offset can reduce interest costs without requiring an extra loan repayment.

Business owners and self-employed borrowers may also value offset accounts for managing irregular income. During higher-income months, surplus funds can sit in offset reducing interest; during leaner months, funds can be withdrawn subject to the account terms.

Property investors may also use offset accounts when saving for a future deposit or managing cash reserves, but the tax and loan-purpose implications should be considered carefully.

Offset accounts can suit borrowers who:

• Maintain meaningful savings balances consistently
• Want flexibility to access funds
• Receive irregular income or bonuses
• Are saving for a specific goal while wanting to reduce loan interest in the meantime

Cost of Offset Accounts

Offset functionality can come with package fees, account fees or a higher interest rate compared with a basic home loan without offset functionality. Fees and pricing vary by lender and product.

The important comparison is whether the interest savings created by your typical offset balance are greater than the additional cost of the loan. Compare the total cost of the product rather than assuming an offset is automatically worthwhile.

Tax Benefits of Offset Accounts

Interest savings from an offset account are generally not treated as interest income in the same way as interest earned in a savings account. The tax outcome can be different for investment lending and depends on the purpose of the borrowing and how the loan is structured.

If you are using an offset account with an investment loan, get advice from a qualified tax professional before changing how you hold or use funds.

Check Your Borrowing Capacity

Use our borrowing capacity calculator to see how much you could borrow and compare loan options with and without offset account features.

Related guides: Redraw Facilities, Extra Repayments and Fixed vs Variable Rate Loans.