What is a mortgage offset account?
A mortgage offset account is a transaction account linked to your home loan, and the balance in it is subtracted from your loan balance before the lender works out interest. So if you have a $500,000 home loan and $50,000 sitting in your offset account, you only pay interest on $450,000. Your loan balance is still $500,000 on paper, but the bank charges interest as though it were $450,000.
The money never leaves your hands. You use the offset like an ordinary everyday account: your salary lands in it, you pay bills from it, you tap your card at the shops. It isn't locked away or paid into the loan. It just quietly shaves down your interest for every day it sits there.
So every dollar in your offset is doing the same job as an extra dollar of repayment, except you can pull it back out whenever you need it. That flexibility is the whole point. It's where an offset fits naturally into the back half of the home buying journey: once you've got the loan, it's how you make it cost less.
How does an offset account work?
An offset account works by reducing the loan balance your interest is calculated on, day by day. Interest on most Australian home loans is worked out daily: each day, your lender subtracts your offset balance from your loan balance, then calculates that day's interest on what's left (this is straight from the government's MoneySmart offset guide). At the end of the month, those daily amounts are added up and charged to your loan.
Because it's calculated daily, you don't need a big lump sum parked there permanently to benefit. Say your $6,000 monthly pay lands in the offset on the 1st and you spend it down across the month, so your average daily balance might only be around $3,000. Even that modest average chips away at your interest every single day, for the life of the loan.
The mechanic doesn't change with the cash rate, but the size of the saving does. The RBA cash rate is currently 4.35%, held at the 16 June 2026 meeting after three rises earlier in 2026 (per the RBA; next decision 11 August 2026), and variable mortgage rates rose through early 2026 rather than fell. The higher your interest rate, the more each offset dollar saves you, so always check the current rate on your own loan rather than assuming. Last reviewed: July 2026.
How much can an offset account save you (and pay off your mortgage faster)?
The savings can be large, because you're attacking interest at the same rate you're being charged. Here's a $500,000 loan over 30 years, using 6% as a clean round example. Real variable rates are higher than that right now (around 6.92% on average as of July 2026, according to Finder), so treat 6% as illustrative and check your own rate.
| Average offset balance | Interest saved over loan life | Loan paid off earlier by |
|---|---|---|
| $10,000 | about $48,000 | about 1.25 years |
| $30,000 | about $128,000 | about 3.5 years |
| $50,000 | about $195,000 | about 5.3 years |
| $80,000 | about $274,000 | about 7.6 years |
Illustrative only; assumes a constant offset balance and rate, and that you keep your repayments the same. Your actual saving will differ.
Why does the loan finish early? If you keep paying the same monthly repayment, the interest portion shrinks each day the offset is full, so more of every repayment goes to the principal. That's how a steady $50,000 average balance can clear a 30-year loan more than five years ahead of schedule, one of the simplest ways to pay off your mortgage faster without scraping together extra cash.
Even money just passing through helps. You don't need a permanent lump sum; a salary that lands and leaves still pulls your average balance up and your interest down. Want your own figures instead of an example? Plug your loan into our mortgage repayment calculator and see what a given offset balance does to your numbers.
Does an offset account lower your monthly repayments?
Usually no: your minimum monthly repayment stays the same. This trips up a lot of first home buyers. An offset doesn't reduce what you have to pay each month. It changes where that money goes. With the offset full, less of each repayment is eaten by interest and more lands on the principal, so you clear the loan early instead of paying less along the way.
There is one exception. Some lenders will recalculate your minimum repayment if you ask them to, which lowers the monthly amount but means you'll take the full loan term to pay it off. For most people, leaving the repayment as-is and finishing years early is the better deal, but it's your call, and a quick chat with your lender or broker will confirm how yours handles it.
Offset vs redraw: what's the difference?
Offset vs redraw is the most common mix-up in home loan features, and the differences matter more than most people realise. Both let you get at extra money, but they're built differently.
| 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 it |
| Access | Instant, use it like a bank account | Subject to lender rules and processing times |
| Minimum withdrawal | No minimum | Some lenders set minimums ($500+) |
| Risk of restrictions | None, it's your account | Lenders can change or restrict redraw |
Ownership is what to remember here. Money in your offset is legally yours: it's a bank account in your name. Money you've tipped into redraw has technically been paid to the lender, and while you can usually pull it back, that access isn't guaranteed. During 2020, at least one lender (ME Bank) cut some customers' available redraw balances with little warning, which caused a real backlash. An offset sidesteps that risk entirely.
There's a tax angle too, if you might one day rent out your home. The interest on an investment loan is tax-deductible, and an offset keeps your full loan balance intact (it only reduces the interest), so the whole balance can stay deductible. Redraw is messier: extra payments actually lower your loan balance, and if you later redraw that money for personal use, the interest on that slice may no longer be deductible. That can cost thousands. If there's any chance your first home becomes an investment, offset is the cleaner choice, but talk to an accountant about your own situation. For more on how loan features stack up, see our fixed vs variable home loan guide.
Offset account vs a regular savings account
An offset usually beats a savings account for most borrowers, because it effectively earns your home-loan rate, tax-free. One thing people miss: an offset doesn't pay you interest; it saves you interest. That saving is worth more than it looks.
Say your loan rate is 6% and a savings account pays 4%. A dollar in the offset cancels 6% of interest you'd otherwise be charged, and you pay no tax on a saving. A dollar in the savings account earns 4%, and you're taxed on that interest, so after tax you might keep only 2.5% to 3%. Same dollar, very different result. Unless you've got a specific reason to keep cash separate, the offset comes out ahead.
Full vs partial offset, and can you have more than one?
Not all offsets are equal. A 100% (full) offset means every dollar in the account reduces your interest, dollar for dollar, and this is what most people picture when they hear "offset". A partial offset only counts a portion of your balance, so it does less work for you.
Partial offsets show up most often on fixed-rate loans, and they're usually capped, commonly somewhere around $10,000 to $20,000, depending on the lender. Above the cap, the extra cash sits there earning nothing for you. Check the fine print, because "offset" on a fixed loan doesn't always mean a full one.
And yes, some lenders let you run more than one offset account against a single loan. That's handy if you like to keep, say, your bills money and your emergency fund visibly separate while both still chip away at the same mortgage. The total balance across all of them is what counts.
Does every home loan come with an offset? (the fees and catches)
No, and this catches a lot of first home buyers off guard. Plenty of loans don't include an offset at all, and some that do will charge you for it.
Basic variable loans, usually the cheapest headline rates, often skip the offset. They might give you a redraw facility instead, but not a true offset.
Standard and premium variable packages carry slightly higher rates but bundle in features like a 100% offset, fee waivers and rate discounts. This is where offset accounts tend to live as a standard inclusion.
Fixed-rate loans rarely come with a full offset. Some lenders offer a capped partial offset on a fixed loan, but many offer none at all, one of the trade-offs of fixing your rate.
Watch the fees. The most common structure today is an annual package fee of around $395 (that's the figure at Westpac, Bank of Melbourne and BankSA, among others), though some lenders charge a small monthly fee instead and a few include offset for nothing. At roughly $395 a year, you'd need an average offset balance of about $6,600 at 6% just to cover the fee in interest saved. Below that, the fee can eat the benefit; above it, you're ahead.
A broker can find you a loan with a free or cheap offset
Some lenders include an offset at no extra cost while others charge an annual package fee. A broker knows which lenders offer the best offset deals and can save you hundreds in fees you didn't need to pay.
When an offset account is NOT worth it
Banks love to sell the upside, so let's be straight about the other side. An offset isn't always the right call, and the downside usually comes down to four things.
- The fee outweighs the saving. If you'll only ever keep a small balance, a $395-a-year package fee can cost more than the interest it saves, and a no-frills basic loan with free redraw may simply be cheaper.
- The base rate is higher. Offset and package loans often carry a higher base rate than a stripped-back basic variable. If that rate premium is bigger than what your offset balance saves you, you're going backwards.
- The buffer is tempting to spend. Because the money is so easy to reach, some people treat the offset as a slush fund and never build a real balance, and an empty offset saves you nothing.
- "Partial" sold as "full". A capped partial offset can be pitched as if it does the full job. Always check whether it's 100% offset and whether there's a cap.
The rule of thumb you'll hear from any seasoned forum poster: an offset only beats a cheaper basic loan once your average balance covers the annual fee plus any rate premium. Run those two numbers, fee and rate gap, against your realistic balance before you commit. A broker can do that comparison across lenders for you.
How to get the most out of your offset
Once you've got an offset, a few habits squeeze real value out of it:
Run all your income through it. Salary, side income, tax refunds, bonuses: point everything at the offset first. The more that's sitting there on any given day, the less interest you're charged.
Keep your savings in the offset, not a savings account. As covered above, the offset's tax-free effective return at your loan rate almost always beats a taxed savings rate. There's rarely a reason to keep idle cash elsewhere.
Consider a credit card for daily spending. Rather than spending straight from the offset, some people put everyday purchases on a credit card and clear it in full each month. That leaves their cash in the offset for the card's interest-free window (typically 30 to 55 days), saving a little extra interest. Only worth it if you genuinely pay the card off every month, no exceptions.
Stop spreading money across accounts. Emergency fund here, holiday savings there, everyday cash somewhere else: it all does more work pooled in the offset. Earmark portions in your head if it helps, but keep the actual money in one place, working against the loan.
Park lump sums before you spend them. Got a refund, a bonus or a gift you'll spend next week? Drop it in the offset first. Every day it sits there is a day of interest saved. To see what any of this does to your own loan, try the mortgage repayment calculator.
Is an offset account worth it for first home buyers?
For most first home buyers, yes, provided the numbers stack up. The trick is matching the offset to how you actually handle money, not just grabbing the feature because it sounds good.
If you'll keep around $10,000 or more on average: it's almost always worth it. The interest saved comfortably clears a $395-a-year fee, and you'll pay the loan down noticeably faster: roughly $48,000 saved over the life of a $500,000 loan at 6% on that balance, in the illustrative model above.
If your balance will sit under about $6,600: do the maths first. At a $395 fee, that's roughly the point where the interest saved covers the fee; below it, a basic variable loan with a lower rate and free redraw can genuinely cost you less.
Even on a tight budget, using the offset as your everyday account still helps: salary in, bills out, and the money passing through trims your interest a little every day. It won't be dramatic in year one, but across a 30-year loan those daily balances add up.
Before you're even at the loan stage, the tools that set you up are our borrowing power calculator (what you can borrow), the deposit tracker (getting your deposit there in the first place) and the first home buyer eligibility checker (which grants and concessions you qualify for). When you're choosing the loan itself, a broker can line up offset deals across lenders so you're not paying for a feature you won't use.
See your own offset savings
Our free repayment calculator shows what your real numbers do over the life of the loan. Try it with a few different offset balances and see how much interest and how many years you could save.
Frequently Asked Questions
How does an offset account work?
An offset account works by subtracting its balance from your loan balance before interest is calculated. Interest on most Australian home loans is worked out daily, so each day your lender takes your offset balance off your loan balance and only charges interest on the difference. The more you keep in the offset, the less interest you pay, without ever paying down the loan itself.
Does an offset account reduce my monthly repayments?
No, usually your minimum monthly repayment stays the same. The benefit is that more of each repayment goes to the principal instead of interest, so you finish the loan early rather than paying less each month. Some lenders will recalculate and lower your repayment if you ask, but then you'd take the full term to pay off the loan.
What's the downside of an offset account?
The main downsides are fees, a higher base rate, and temptation. A package fee of around $395 a year can cost more than the interest you save if your balance is small, and offset loans often carry a higher rate than a basic no-frills loan. The easy access to the money also makes the buffer tempting to spend. An offset only beats a cheaper basic loan once your average balance covers the fee plus any rate difference.
Is an offset account worth it?
If you keep roughly $6,600 or more in the account on average, the interest saved generally outweighs a typical $395-a-year package fee, and at around $10,000 you could save about $48,000 over the life of a $500,000 loan in an illustrative model. Below that balance, a cheaper basic loan with free redraw can win. A mortgage broker can help you find a loan with a free or low-cost offset.
Is an offset account better than a savings account?
For most borrowers, yes. An offset effectively earns your home-loan rate (around 6% in our example), and that saving is tax-free, whereas interest from a savings account is taxed, so it nets less. The catch to remember is that an offset saves you interest rather than paying you interest, but for anyone with a mortgage, that's usually the better deal.
What's the difference between an offset and redraw?
An offset account is a separate transaction account where the 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 able to be restricted. Offset is generally better for flexibility, security and tax, especially if you might one day turn your home into an investment property.
Can I use my offset account as an everyday account?
Yes, and that's exactly how to get the most from it. Have your salary paid straight into the offset, pay your bills from it, and use it for daily spending. The more money in the account on any given day, the less interest you pay. Some people also put everyday spending on a credit card and clear it monthly from the offset, keeping their cash in the account for the card's 30 to 55 day interest-free window.
Do all home loans have an offset account?
No. Basic variable loans, which often have the lowest headline rates, frequently skip the offset. You'll usually need a standard or premium variable package to get a 100% offset, and fixed-rate loans rarely offer a full one (some have a capped partial offset). Some lenders include offset for free; others charge an annual package fee of around $395. A broker can compare options and find you a competitive loan with offset included.
