For most Australian doctors, a 100 per cent offset account on a variable rate loan is the right default. It cuts interest like extra repayments, keeps cash fully accessible, and protects future tax deductions if the home ever becomes an investment property. Redraw is useful on fixed splits and simple loans, but creates tax traps for investors and offers less liquidity.
Key Takeaways
- Offset reduces interest charged on your loan without locking away your cash
- Redraw can break the deductibility of debt when an owner occupied home becomes an investment
- Doctors with lumpy income benefit most from the flexibility of an offset
- Package fees only make sense if your average offset balance is high enough to outearn them
- Review the loan structure at each career stage and at each property change
Quick Answer
Offset accounts and redraw facilities both reduce the interest you pay on a home loan, but they work differently and suit different situations. For most doctors with high, variable income and a long career horizon, a 100 per cent offset account on a variable rate loan offers the most flexibility, the cleanest tax treatment for a future investment property, and the easiest way to use surplus cash without locking it away. Redraw can still be a useful no cost option on simpler loans, but it carries tax traps for investors and less liquidity in a tight spot.
What is an offset account?
An offset account is a transaction or savings account that sits alongside your home loan. Every dollar in the offset reduces the loan balance that the bank charges interest on. If you owe 700,000 dollars and hold 80,000 dollars in the offset, the bank only charges interest on 620,000 dollars. The loan balance does not actually decrease, so you keep full access to that 80,000 dollars at any time.
Most major Australian lenders offer 100 per cent offset accounts on variable rate loans. Some offer partial offsets on fixed rate loans, where only a portion of the balance offsets the loan, typically with restrictions on how much you can hold there.
What is a redraw facility?
Redraw is a feature that lets you pull back extra repayments you have already made on your loan. If your minimum monthly repayment is 4,200 dollars and you pay 5,200 dollars, the extra 1,000 dollars reduces the loan balance and is available to redraw later if you need it.
Redraw is generally free on basic variable loans and often available, though sometimes restricted, on fixed loans. The funds sit inside the loan itself rather than in a separate account.
The key practical differences
The mechanics matter more than they look on the surface.
Liquidity. Money in an offset is available instantly through your everyday banking. You can use it like a regular savings or transaction account, with a debit card, BPAY, and direct debits. Redrawn funds usually require a transfer request through your banking app, with some lenders imposing minimum redraw amounts or daily caps.
Risk of restricted access. Lenders can change redraw rules. Several major banks have, in the past, temporarily restricted redraw during stress periods. Offset balances, sitting in a deposit account in your name, are far less likely to be touched.
Tax treatment. This is where most doctors lose money without realising it. When you redraw funds, the ATO views that as a new borrowing. If you redraw to fund a private expense, you can split the deductibility of your loan and create a mess. Offset accounts do not trigger this issue because withdrawing from an offset is just spending your own savings.
Fees and rates. Loans with full offset accounts often sit on a package or professional rate and can carry an annual fee, usually around 300 to 400 dollars. Basic loans with redraw only often have a lower headline rate and no annual fee. Whether the offset wins depends on the interest you save against the fee.
Why offset suits most doctors
Doctors tend to share a few financial characteristics that make offset particularly powerful.
Income is high and often lumpy. Locum payments, on call loadings, private billings, and bonuses arrive in uneven chunks. Parking surplus cash in an offset reduces interest immediately, without committing to extra repayments you might want back next quarter.
Career stages shift quickly. A registrar today is a consultant in a few years, then perhaps a private practice owner. The home you buy now may become an investment property later. An offset preserves the tax efficiency of that future investment loan because you have not reduced the loan balance with extra repayments that you would later need to redraw.
Tax brackets are high. Every dollar of interest avoided through an offset is the equivalent of earning that interest in a savings account, but tax free. For a doctor in the top marginal bracket, a 5.8 per cent variable rate offset is roughly equivalent to a pre tax return north of 10 per cent on the equivalent cash. No deposit account beats that.
When offset is not the right answer
There are situations where redraw, or no offset at all, makes more sense.
A small or short term loan where the offset package fee outweighs the interest saving. As a rule of thumb, if your average offset balance multiplied by the loan interest rate is less than the annual fee, you are paying for a feature you do not use.
A fixed rate loan where the lender does not offer full offset. In that case, redraw on the fixed portion plus offset on a small variable split is often the cleanest structure.
A simple owner occupied loan with no plan to ever convert it to an investment, and a household that will keep its cash buffer in a separate high interest savings account anyway. Some doctors prefer this for the discipline of separation.
A common doctor scenario: buy now, rent out later
This is where the offset versus redraw decision pays back the most.
Imagine you buy a home as a registrar with a 750,000 dollar loan. Over five years you save aggressively and build a 150,000 dollar buffer.
If that buffer sits in an offset, your loan balance is still 750,000 dollars on paper. When you upgrade and turn the original property into a rental, the full 750,000 dollar loan continues to support an income producing asset. The interest is fully deductible against your rental income. You take the 150,000 dollars out of the offset and use it as the deposit on the new home.
If instead you made 150,000 dollars in extra repayments and relied on redraw, the loan balance is now 600,000 dollars. When you redraw the 150,000 dollars to fund the new owner occupied home, the ATO treats that redraw as borrowing for a private purpose. Only the original 600,000 dollars of debt is deductible against the rental income. The deductibility of the other 150,000 dollars is lost.
For a high income doctor, that difference can compound to tens of thousands of dollars in lost deductions across the life of the loan.
Practical tips for using an offset well
A few habits make a meaningful difference over time.
Direct all income, including salary, locum payments, and dividends, into the offset rather than a separate everyday account. The longer dollars sit there before being spent, the more interest you save.
Use a credit card with an interest free period for everyday spending, paying it off in full from the offset each month. This pushes your spending later and keeps more cash in the offset for longer. Only do this if you reliably pay the card off in full.
Avoid spreading cash across multiple offset accounts if your lender only allows one to fully offset. Some lenders permit multiple offsets, others do not. Check your structure.
Review the loan annually. The package fee, your average offset balance, and your interest rate together determine whether the structure still earns its keep. Refinancing every few years is normal for high income borrowers.
Choosing between offset and redraw
A simple decision frame works for most doctors.
If the property could ever become an investment, choose offset. The tax flexibility alone justifies it.
If the loan is small, short term, or you genuinely will not keep a meaningful balance against it, a basic loan with free redraw is fine.
If you are on a fixed rate, use redraw on the fixed portion and an offset on a small variable split for surplus cash.
If you are time poor and unsure, talk to a broker who works with medical professionals. The right structure changes with your career stage, and a short conversation can prevent six figure tax mistakes years later.
Final word
Offset accounts and redraw facilities are not interchangeable. For most Australian doctors, with the income profile and likely future investment activity that comes with a medical career, a 100 per cent offset on a variable rate loan is the default structure. Redraw has its place, particularly on fixed splits and basic loans, but the tax flexibility and liquidity of an offset is hard to beat.
The cost of getting this wrong is rarely felt at the time. It shows up years later, when an owner occupied home becomes an investment, or when cash flow tightens and access to funds becomes critical. Setting it up properly at the start is the simplest tax efficiency move most doctors can make.
General information only. This article does not constitute personal financial, tax, or credit advice. Information is current as at May 2026. Talk to a qualified adviser about your individual circumstances.
