Offset Accounts Explained: How They Work and Who Benefits
A plain-English guide to mortgage offset accounts — how they reduce interest, who benefits most, and whether an offset is worth paying extra fees for.
An offset account is one of the most powerful features in Australian home lending — but not everyone needs one. Here’s how they work and when they’re worth it.
How an offset account works
An offset is a transaction account linked to your home loan. The bank subtracts the offset balance from your loan balance before calculating interest.
Example: You owe $500,000. You have $50,000 in your offset. Interest is calculated on $450,000 instead of $500,000.
You still make the same minimum repayment, but more of it goes to principal. Over time, this can save significant interest and shorten your loan.
Full offset vs partial offset
- Full offset — 100% of your balance reduces the interest. This is what most variable-rate loans offer.
- Partial offset — only a percentage counts. Less common and less useful.
Always ask for a full offset.
Who benefits most
- Borrowers with savings — even $20,000–$30,000 sitting in offset makes a meaningful difference
- People paid into offset — if your salary hits the offset, every dollar reduces interest from the day it lands
- Investors — offset is generally preferred over redraw for tax purposes (talk to your accountant)
Who doesn’t need one
- If you carry a near-zero transaction balance most of the time, the offset fee may cost more than you save
- If you’re on a fixed rate — most fixed loans don’t offer a true offset
Offset vs redraw
Both reduce interest, but there’s a critical tax difference for investors. Money redrawn from a loan can change the tax deductibility of that portion. Money in an offset is always your money — it never changes the loan balance. For investment loans, offset is almost always the smarter choice.
Is the fee worth it?
Some lenders charge $10–15/month for an offset feature. On a $500,000 loan at 6%, keeping just $20,000 in offset saves roughly $1,200/year in interest. The fee pays for itself many times over.
Ask us whether offset makes sense for your loan →
General information only. Consider your personal circumstances before acting.