What Is a Mortgage Offset Account?
A mortgage offset account is a transaction account linked to your home loan. The money sitting in this account reduces the loan balance you pay interest on — without actually paying down the loan itself.
Here’s the simple version: if you have a $500,000 home loan and $50,000 in your offset account, you only pay interest on $450,000. Your loan balance is still technically $500,000, but the bank calculates your interest as if it were $450,000.
The best part? Your money is still completely accessible. You can use the offset account like a normal everyday transaction account — deposit your salary, pay bills, tap your card at the shops. The money isn’t locked away. It just happens to be saving you interest while it sits there.
Think of it this way: every dollar in your offset account is working as hard as a dollar of extra repayment — but you can take it back anytime you need it.
How Much Can an Offset Account Save You?
The numbers are genuinely impressive. Let’s use a $500,000 home loan at 6.00% over 30 years to show the impact:
| Average offset balance | Interest saved over loan life | Loan paid off earlier by |
|---|---|---|
| $10,000 | ~$19,000 | ~1 year |
| $30,000 | ~$54,000 | ~3 years |
| $50,000 | ~$89,000 | ~4.5 years |
| $80,000 | ~$133,000 | ~6.5 years |
That’s not a typo — keeping $50,000 in your offset can save you nearly $89,000 in interest and get you mortgage-free 4.5 years sooner. That’s the power of compound interest working in your favour instead of against you.
Even your salary passing through helps. You don’t need a lump sum sitting there permanently. If you deposit your $6,000 monthly salary into the offset on the 1st and gradually spend it through the month, the average daily balance might be $3,000. Over 30 years, even that modest average saves thousands in interest.
The key principle: every dollar in your offset, for every day it’s there, is reducing your interest. The more you can funnel through it, the more you save.
Offset Account vs Redraw Facility — What’s the Difference?
These two features are often confused, but they work differently — and the differences matter more than most people realise.
| Feature | Offset account | Redraw facility |
|---|---|---|
| Where your money sits | Separate transaction account | Inside your home loan |
| Ownership | Your money — always yours | Technically the lender’s until you withdraw |
| Access | Instant — use like a bank account | Subject to lender restrictions and processing times |
| Minimum withdrawal | No minimum | Some lenders set minimums ($500+) |
| Risk of restrictions | None — it’s your account | Lenders can freeze or restrict redraw |
The ownership difference is critical. Money in your offset account is legally yours — it’s a bank account in your name. Money you’ve put into redraw has technically been paid to the lender. While you can usually withdraw it, some lenders have restricted redraw access during financial crises. This actually happened during COVID — some lenders temporarily limited redraw withdrawals.
Tax implication if you convert to an investment property. If you ever move out of your home and rent it out, the interest on your home loan becomes tax-deductible. With an offset account, your full loan balance remains intact (the offset just reduces interest), so the full balance is potentially deductible. With redraw, extra payments actually reduce your loan balance — and if you redraw that money for personal use, the interest on that portion is no longer deductible. This can cost you thousands in tax. If there’s any chance you might one day turn your home into an investment, offset is the smarter choice — but always talk to an accountant about your specific situation.
For most first home buyers, offset is the better option if your loan includes it without excessive fees. It gives you more flexibility, more protection, and better tax positioning.
Does Every Home Loan Come With an Offset Account?
No — and this catches many first home buyers off guard. Not all home loans include an offset account, and the ones that do may charge for it.
Basic variable loans — typically the cheapest rates available — usually don’t include an offset account. They might offer a redraw facility instead, but no true offset.
Standard and premium variable packages — slightly higher rates but come with features like 100% offset, fee waivers, and rate discounts for multiple products. These are where you’ll find offset accounts as a standard inclusion.
Fixed rate loans — rarely offer a full offset account. Some lenders offer a partial offset on fixed loans (e.g., up to $50,000), but most don’t offer offset at all. This is one of the trade-offs of fixing your rate.
Watch out for fees. Some lenders charge a monthly package fee of $10–$15 for loans that include an offset account. On its own, $15/month = $180/year. If you keep less than roughly $3,000 in your offset on average, the fee might outweigh the interest savings. But if you keep $10,000+, the savings dwarf the fee.
A broker can find you a loan with a free offset account
Some lenders include offset at no extra cost while others charge monthly fees. A broker knows which lenders offer the best offset deals and can save you hundreds in unnecessary fees.
How to Maximise Your Offset Account
Once you have an offset account, these strategies squeeze the most value from it:
1. Funnel all income into it. Your salary, any side income, tax refunds, bonuses — everything should land in the offset account first. The more money sitting there on any given day, the less interest you pay.
2. Keep your savings in the offset — not a savings account. If your home loan rate is 6% and your savings account pays 4%, keeping money in the offset gives you an effective return of 6% — and it’s tax-free. A 4% savings account, after tax, might only net you 2.5–3%. The offset wins every time.
3. Use a credit card for daily spending. This is a popular strategy: instead of spending directly from your offset account, use a credit card for everyday purchases and pay it off in full each month. This keeps your money in the offset for an extra 30–55 days (the credit card’s interest-free period), reducing your home loan interest further. Only do this if you’re disciplined enough to always pay the card in full.
4. Don’t leave money scattered across accounts. Many people keep emergency funds, holiday savings, and everyday cash in separate accounts. Consolidate everything into the offset. You can mentally earmark portions for different purposes, but physically the money should all be in one place — working against your mortgage.
5. Park lump sums before spending them. Received a tax refund? Bonus from work? Gift from family? Even if you plan to spend it within a week, deposit it into the offset first. Every day that money sits there saves you interest.
Is an Offset Account Worth It for First Home Buyers?
For most first home buyers, the answer is yes — but it depends on your numbers.
If you keep $10,000+ in the account on average: Absolutely worth it. The interest savings will easily outweigh any monthly fees, and you’ll pay off your loan significantly faster. At $10,000 average balance on a $500,000 loan at 6%, you’re saving roughly $19,000 over the life of the loan.
If your savings are under $5,000: It depends on fees. If your lender charges $15/month ($180/year) for the offset feature, and your average balance is $3,000, you’re saving about $180 in interest — roughly break-even. In this case, a basic variable loan with a lower rate and no offset might actually cost you less.
Even on a tight budget, it helps. If you use the offset as your everyday transaction account — salary goes in, bills come out — the money passing through still reduces your interest. It won’t be life-changing amounts in the first year, but over a 30-year loan, those daily balances add up to real savings.
The bottom line: if you can get a loan with a free or cheap offset account at a competitive interest rate, it’s almost always worth having. If the offset comes with a significantly higher rate or expensive fees, run the numbers first.
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Frequently Asked Questions
Is an offset account worth it?
If you keep $10,000 or more in the account on average, the interest savings easily outweigh any monthly fees — you could save $19,000+ over the life of a $500,000 loan. Even $5,000 saves hundreds per year on a typical home loan at current rates. The only time it may not be worth it is if your lender charges high fees and your average balance is very low (under $3,000). A mortgage broker can help you find a loan with a free or low-cost offset account.
What is the difference between offset and redraw?
An offset account is a separate transaction account where your money stays legally yours and is always accessible. A redraw facility holds extra repayments inside your loan — technically the lender’s money until you withdraw it, and subject to potential restrictions. Offset is generally better for flexibility, security, and tax purposes — especially if you might ever convert your home to an investment property. Read the fixed vs variable guide for more on loan features.
Can I use my offset account as an everyday account?
Yes — and that’s exactly how you should use it for maximum benefit. Deposit your salary directly into the offset account, pay your bills from it, and use it for everyday transactions. The more money sitting in the account on any given day, the less interest you pay on your home loan. Many people also use a credit card for daily spending and pay it off monthly from the offset, keeping money in the account for an extra 30–55 days.
Do all home loans have offset accounts?
No. Basic variable rate home loans — which often have the lowest headline rates — typically don’t include an offset account. You’ll usually need a standard or premium variable loan package to get a 100% offset account. Fixed rate loans rarely offer full offset, though some lenders provide partial offset on fixed loans. Some lenders include offset for free, while others charge a monthly package fee of $10–$15. A broker can compare options and find you a competitive loan with offset included.
