Offset Account vs Redraw: What Every Australian Homeowner Needs to Know
Offset account vs redraw: same interest saving, very different tax outcomes if your home becomes an investment property. The structural difference explained.
By Timothy Hirou GaschereauPublished 10 min read
Try it yourself
This one pairs with our fixed vs variable vs split home loans guide and how to pay off your mortgage faster. Most Australians pick one or the other based on whatever their broker mentions first, that's fine, until the day the property becomes an investment.
Quick answer
Both an offset account and a redraw facility save you interest in exactly the same way, your extra cash reduces the balance interest is calculated on. Structurally they're completely different: offset money stays separate from your loan, redraw money goes into the loan. If your home ever becomes an investment property, that difference has real tax consequences.
In this guide
- →How each product actually works, mechanically
- →The tax trap almost nobody explains upfront
- →A side-by-side comparison of the practical differences
- →Which one suits which situation
💳 What is an offset account?
🎯 The essential: A separate transaction account linked to your loan. Your loan balance doesn't change, but interest is only charged on the difference.
Worked example: a $500,000 home loan with $50,000 kept in offset. Interest is calculated on $500,000 − $50,000 = $450,000. The loan balance on paper is still $500,000, the $50,000 is your money, sitting separately, reducing the interest you're charged daily.
Because it's a transaction account, you can spend from it freely, transfer in and out, use a linked debit card, no approval process, no lender involvement. Offset accounts are most commonly available on variable rate loans, if you're on a fixed rate your lender may not offer a full offset, or may offer only a partial one.
↩️ What is a redraw facility?
A redraw facility works differently. Instead of keeping extra cash in a separate account, you make additional repayments directly onto your loan. Those extra repayments reduce your actual loan balance, and the redraw feature lets you pull that money back out if you need it.
Same $500,000 loan, $50,000 in extra repayments over a few years. Loan balance is now $450,000, interest is calculated on $450,000. The interest saving is identical to the offset example, but that $50,000 is now part of the loan. To access it, you redraw it, effectively re-borrowing from your own loan.
Some lenders process redraw instantly online, others have minimum amounts, processing delays, or fees. You're not spending from a transaction account, you're requesting funds from your lender.
⚠️ The tax trap (read this twice)
This is the section that matters most if you ever plan to rent out your property.
A worked scenario: you buy a $600,000 home to live in. Over five years, you make $80,000 in extra repayments via redraw. The loan balance is now $520,000. Then you move interstate for work and start renting the property out, expecting to claim the loan interest as a tax deduction. A few months later you redraw $40,000 for a car.
Here's the problem: the ATO looks at what redrawn funds are used for, not what the original loan was for. That $40,000 was redrawn for a private purpose, so the interest on that portion of the loan isn't deductible as a rental expense. You now have a "mixed purpose" loan, part investment, part private, and the deductible portion needs to be calculated proportionally. This is governed by ATO Taxation Ruling TR 2000/2.
Why offset avoids this entirely: if you'd used an offset account instead, the $80,000 would have stayed in a separate transaction account. The loan balance would still be $600,000, and when the property becomes a rental, the full loan is potentially deductible under normal rental deduction rules. The offset money is your own cash, never mixed into the loan, so there's no contamination. You can spend the offset balance on whatever you like, private purpose or not, without it touching the loan's deductibility at all.
The bottom line: redraw isn't inherently bad, but treat it as a one-way street if there's any chance the property becomes an investment. Extra repayments go in and stay in. The moment you redraw for anything other than the investment property itself, you create a mixed-purpose problem. This is general information, not tax advice, talk to a registered tax agent about your specific situation.
⚖️ Offset vs redraw: side by side
| Offset account | Redraw facility | |
|---|---|---|
| Where your money sits | Separate transaction account | Applied directly to the loan balance |
| Effect on loan balance | Unchanged | Reduced by extra repayments |
| Access to funds | Instant, like a bank account | Via lender redraw request |
| Tax risk if property becomes an investment | Clean, loan balance is the deductible amount | Risk of mixed purpose if redrawn funds used privately |
| Fees | Often a monthly or annual fee | Usually free or low cost |
✅ When to choose an offset account
- You might rent the property out one day, even a small chance. Restructuring a contaminated loan later is painful. If there's any doubt, offset is the safer default.
- You want full flexibility without lender involvement. Offset money is your money in your account.
- You're self-employed or have irregular income. A cash buffer in offset saves mortgage interest while staying accessible for a slow month or a tax bill, effectively earning your mortgage rate, typically better than a savings account after tax.
✅ When to choose a redraw facility
- You're certain this is your forever home and disciplined about not redrawing for personal expenses, redraw works just as well as offset and usually costs less.
- Your lender doesn't offer offset, or charges a significant premium for it, particularly common on fixed rate loans.
- You want the psychological win of watching your loan balance fall on paper. Some people find that genuinely motivating, and if it keeps you making extra repayments, that's a legitimate reason.
Some borrowers split the difference: a variable portion with an offset account attached, and a fixed portion using extra repayments. That gets tax protection and flexibility on the variable side while keeping rate certainty on the fixed side.
🏃 How to Pay Off Your Mortgage Faster
Strategies that work alongside both offset and redraw, fortnightly repayments, lump sums, and more.
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❓ Frequently asked questions
Is an offset account worth the fees?
+
It depends on your balance. If you consistently keep a meaningful amount in offset, the daily interest saving will usually outweigh a typical monthly fee. If your balance is low and irregular, the maths may not stack up. Run the numbers for your specific loan rate and balance, and check the current fee in your provider's product disclosure statement.
Can I have both an offset account and a redraw facility?
+
Yes, some loans include both. The offset account handles your liquid cash buffer, extra repayments via redraw reduce the principal. Just be careful about the tax implications if you ever redraw for personal use on a property that becomes an investment.
Does money in an offset account earn interest?
+
No, not directly. Instead of earning interest, it saves you interest at your mortgage rate. The effect is similar, and often better after tax since you're not paying income tax on the "return", but it's not interest income, you won't see a credit on your statement.
What happens to my offset account if I switch lenders?
+
The offset account is a product of your current lender. If you refinance, the offset account closes and the balance is returned to you. You'd set up a new offset account with the new lender, factor this into your refinancing decision if you carry a large offset balance.
Is redraw always free?
+
Not always. Some lenders charge a fee per redraw transaction, set minimum redraw amounts, or restrict the number of redraws per year. Check your loan's product disclosure statement.
Can I use an offset account on a fixed rate loan?
+
Usually not a full offset account. Some lenders offer a partial offset on fixed rate loans, but full 100% offset is typically only available on variable rate loans. This is one reason some borrowers choose a split loan structure.
Does the ATO care which one I use?
+
The ATO cares about the purpose of the borrowed funds, not which product you use. Offset keeps your extra cash separate from the loan, so there's no mixed-purpose risk. Redraw puts your money into the loan, and if you redraw it for a private purpose later, you've created a deductibility problem. If your property might ever become an investment, talk to a registered tax agent before deciding.
📚 Recommended reading
The Psychology of Money
Morgan Housel
19 short stories on how people actually think and feel about money, not just the maths of it.
Mindful Money
Canna Campbell
A calmer, values-first approach to investing and financial wellbeing from a certified financial planner.
Some links above are affiliate links. If you buy through them, Snowball Invest may earn a small commission at no extra cost to you. We only recommend books we'd suggest anyway.
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Timothy Hirou Gaschereau
Founder of Snowball Invest, not a financial adviser.
I write about what I'm learning myself, because nobody ever taught us how to take control of our own money. It's a skill, not a mystery, and it's never too late to learn it. The best day to start was yesterday, the second best is today.
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