With variable rates sitting around the 6% mark and lenders still assessing borrowers at their actual rate plus 3 percentage points under Australian Prudential Regulation Authority (APRA) rules, where you hold your spare cash against a mortgage has become a real financial decision rather than an afterthought. Two features dominate that decision: the offset account and the redraw facility. They can produce an almost identical interest saving, which is why they are often treated as interchangeable, yet they behave very differently once tax deductibility and loan structure come into play.
For accountants the stakes are higher than for most borrowers, because the choice shapes not only interest but the deductibility of debt and the way income and tax provisions flow through your accounts. If you want this assessed against your own circumstances, a mortgage broker for accountants can help match the structure to your plans. This article explains how each facility works, where the tax and structuring differences sit, and how to decide which one suits you.
How an Offset Account Works
An offset account is an everyday transaction or savings account linked to your home loan, where the balance is set against the loan for the purpose of calculating interest. If you have a $600,000 loan and $50,000 in the offset, you are charged interest as though you owe $550,000, while the $50,000 remains your own money.
The defining features are worth keeping in mind:
- The funds stay yours. Withdrawing from an offset is spending your savings, not borrowing, and you can access the money at any time like a normal account.
- A full (100%) offset reduces interest dollar for dollar; some products only offer a partial offset, so the structure matters.
- Offsets are usually attached to a packaged loan with an annual fee, and some lenders allow more than one offset account against the same loan.
How a Redraw Facility Works
A redraw facility lets you access the extra repayments you have made above the minimum required. When you pay more than you owe, the loan balance falls and you are charged less interest; redraw is simply the ability to pull those additional repayments back out later.
The practical difference from an offset is in the mechanics and the control. Redraw funds have already been paid into the loan, so accessing them is a withdrawal from the loan account itself, often subject to minimum redraw amounts, online limits, processing times, and the lender’s discretion to reduce or freeze availability. Redraw is typically free and is the main flexibility feature on basic loans that do not offer an offset.
Same Interest Saving, Different Tax Outcome
It helps to settle one point early: for the same amount of money, an offset and a redraw save you the same interest. A $50,000 offset balance and $50,000 sitting in redraw both reduce the interest you pay on a $600,000 loan to the same degree. If interest were the only consideration, the two would be a coin toss.
They are not a coin toss, because the Australian Taxation Office (ATO) treats them differently. Money in an offset is your savings, so moving it in or out is not a borrowing event. Redrawing funds from a loan, by contrast, is treated as new borrowing, and the deductibility of that money depends on what you use it for. For an accountant, that single distinction is usually the whole decision.
Why the Distinction Matters for Accountants
Accountants tend to invest, run businesses, or advise clients who do, which means the structuring consequences of offset versus redraw show up directly in their own affairs. Four situations make the difference concrete.
Preserving Deductible Debt
When you redraw and use the money for a private purpose, you create a mixed-purpose loan, and the deductible and non-deductible portions then have to be apportioned for the life of the loan. This is the contamination problem that makes redraw awkward on any loan that is, or may become, deductible. An offset avoids it entirely, because withdrawing your own savings does not change the purpose or the deductible balance of the loan.
Converting a Home Into an Investment Later
This is the scenario that most often catches people out. Consider an accountant with a $600,000 home loan who builds up $150,000 in spare cash over several years. If that money sits in redraw, the loan effectively falls toward $450,000. Should they later move out, rent the property, and buy a new home, only the reduced balance is deductible against the rent, and pulling the $150,000 back out to fund the new home is new borrowing for a private purpose, so it is not deductible. Had the same $150,000 sat in an offset, the loan balance would have stayed at $600,000, the full amount would be deductible once the property is rented, and the savings could be redirected to the new home without affecting deductibility.
Managing Business Cash Flow and Tax Provisions
Accountants and business owners often hold money they will owe later, such as Goods and Services Tax (GST), Pay As You Go (PAYG) instalments, and provisions for income tax. Parking those funds in an offset reduces interest while the money waits, then releasing them to pay the ATO is a simple withdrawal that leaves the loan structure untouched. Redraw can do the interest part, but every withdrawal is a loan transaction, which is less clean for lumpy or seasonal income.
Keeping Records Clean
An offset keeps a clear line between what you own and what you owe, which makes apportionment and substantiation straightforward at tax time. Redraw activity mingles savings behaviour with the loan account, and a series of redraws and repayments can turn a simple deductible loan into a record-keeping exercise nobody enjoys.
When a Redraw Facility Can Be the Better Fit
None of this makes redraw the wrong choice in every case, and it is worth being even-handed about where it wins. The case for redraw is strongest when tax is not in the picture.
For a straightforward owner-occupier who has no intention of converting the property to an investment and does not need to manage business tax provisions, a basic loan with redraw can be the cheaper option, because it usually avoids the package or offset fee and may carry a lower rate. Some borrowers also find that the slight friction of accessing redraw helps them leave the money alone, where an offset that behaves like an everyday account can be too easy to spend. And on products where no offset is offered, redraw is simply the tool available. The point is to match the facility to your plans rather than to assume the more sophisticated option is automatically better.
A Framework for Deciding
The decision becomes much simpler once you stop comparing interest and start thinking about purpose and future flexibility. The following questions tend to point clearly in one direction.
- If the property may one day become an investment, or you already hold investments, lean toward an offset to protect deductible debt.
- If you have variable business income and tax provisions to hold, an offset lets you reduce interest without disturbing your loan structure.
- If you want the lowest cost and absolute simplicity on an owner-occupied loan with no investment intentions, redraw may be all you need.
- Weigh any package or offset fee against the interest and flexibility benefit, based on the balance you realistically expect to hold.
- Check the product detail, since some lenders offer an offset on basic loans, allow multiple offsets, or limit redraw in ways that affect the comparison.
Because the right answer turns on your wider tax position and your plans for the property, it is worth confirming the structure with both your tax adviser and a broker before you settle on a loan, rather than after.
Frequently Asked Questions (FAQs)
Do offset and redraw save the same amount of interest?
For the same balance, yes. A given sum produces the same interest reduction whether it sits in an offset account or in redraw. The difference between the two is not the interest saving; it is how the money is treated for tax, how easily you can access it, and what it does to your loan structure.
Why does a redraw affect tax deductibility but an offset does not?
Redrawing money from a loan is treated as new borrowing, so the deductibility of those funds depends on the purpose you put them to. Using redrawn funds privately can create a mixed-purpose loan that must be apportioned. An offset balance is your own savings, so moving it in or out is not a borrowing event and does not change the loan’s deductible purpose.
I might turn my home into an investment property later. Which should I choose?
An offset is generally the safer structure in that situation. It lets you reduce interest now while keeping the loan balance, and therefore the future deductible debt, intact. Money held in redraw permanently lowers the balance that would be deductible once the property is rented, which can be costly to unwind.
Is an offset account worth the package fee?
That depends on the balance you tend to hold. The interest saved on a meaningful offset balance can outweigh an annual fee comfortably, while a small or fluctuating balance may not justify it. The structuring and deductibility benefits can tip the decision even where the interest maths is close, particularly for investors.
Can I have both an offset and a redraw on the same loan?
Often yes, depending on the lender and the product. Many packaged loans include both, and some borrowers use an offset for everyday savings while leaving redraw untouched. The availability and any fees vary by lender, so it is worth confirming before you commit.
Are offset funds treated as savings when I apply for another loan?
Generally an offset balance is viewed as genuine savings, which can be helpful when you next apply for finance. Available redraw is part of a loan that has been paid down, and lenders usually assess the loan on its limit. Treatment differs between lenders, so this is one more area where matching your structure to the right lender pays off.
The Bottom Line
For accountants, the choice between an offset account and a redraw facility is rarely about interest, because on the same balance the two save the same amount. The real difference is in tax and structure: an offset protects deductible debt, keeps savings and borrowings cleanly separated, and suits anyone who invests, may convert a home to an investment, or manages business tax provisions, while redraw can be the simpler and cheaper choice for a straightforward owner-occupier with no such plans. The sensible step is to decide based on your purpose and your future intentions, and to confirm the structure with your tax adviser and a broker before you lock in a loan, rather than discovering the consequences at tax time.