Both can reduce the interest you pay, and both can leave your effective loan balance the same on paper, the practical difference is in how your money is held, and what happens if the property’s use ever changes.
How each one works
Offset. A separate transaction account linked to your loan. Its balance is “offset” against your loan balance before interest is calculated, so $20,000 sitting in an offset account against a $500,000 loan means interest is only charged on $480,000, while your $20,000 stays in an everyday account, fully accessible for bills, emergencies or spending, any time.
Redraw. Extra repayments go directly onto the loan itself, reducing the balance the same way an offset would, but the money is no longer sitting separately. To get it back, you make a redraw request, and depending on the lender that can mean a fee, a minimum amount, a processing delay, or in some cases a facility that needs to be set up in advance rather than being automatic.
A worked example
Two clients each keep $30,000 in spare cash against a $500,000 loan at 6% for a full year. Both save roughly the same interest, around $1,800, while the money is parked. The difference shows up later: the offset client can move the $30,000 out same-day for an emergency with no paperwork. The redraw client may need to submit a request, wait for it to process, and check whether their lender charges a redraw fee or caps the amount per transaction.
The one case where it really matters: turning the property into an investment
If there’s any chance you’ll move out and rent the property out later, this distinction has tax implications, not just convenience ones. Money in an offset account never touches the loan balance, so the deductible loan amount is unaffected if you later rent the property out. Redrawn funds that were then re-spent on personal purposes can complicate the deductibility of the corresponding portion of the loan. This is general information, not tax advice, a worthwhile conversation with an accountant if this scenario is realistic for you.
What can vary by lender
- Whether offset is available at all on a given product (fixed-rate loans often don’t offer it, or only a limited/partial offset)
- Whether an ongoing package fee applies for the offset feature
- Redraw minimums, fees, and how quickly funds are released
Next step: see the effect of your own spare-cash balance in the Offset impact calculator.