Two loan features do a similar-looking job. Both reduce the interest you are charged. Both let you get at the money again. Plenty of people treat them as the same thing with different names.

They are not, and the difference is worth understanding before you pick, because one of the consequences only shows up years later — usually at the exact moment it is expensive to have got wrong.

What each one actually is

An offset account is a transaction account that sits alongside your loan. The balance in it is subtracted from your loan balance before interest is calculated. With $40,000 in offset against a $600,000 loan, you are charged interest as though you owed $560,000. The $40,000 is still yours, sitting in your own account.

Redraw is different in one fundamental way: the money is not yours any more. When you pay extra into your loan, you have repaid debt. Redraw is the lender's facility for letting you borrow some of it back. The interest saving is the same, because your loan balance genuinely is lower. What has changed is who holds the money.

That single distinction — your money beside the loan, versus repaid money you can ask for back — drives everything below.

Access, and who controls it

Money in an offset account is money in a bank account. You have a card, you have transfers, and it behaves like any other everyday account.

Redraw is a facility the lender provides, and facilities have conditions. Access can be slower. There may be minimum withdrawal amounts, limits on how often, or a small fee. On some loans redraw is not available at all — fixed-rate loans commonly restrict both extra repayments and redraw during the fixed term.

Most of the time this is a mild inconvenience. Occasionally it is not. Lenders generally reserve the right to reduce or withdraw redraw availability, and that right tends to be exercised precisely when credit conditions tighten — which is often the same moment you were counting on the money. If a balance is your emergency fund, its accessibility should not be at someone else's discretion.

The tax difference, which is the big one

Here is the part that costs people real money, and the reason we ask about future plans before recommending a structure.

Interest is generally deductible based on what the borrowed money was used for. Money borrowed to buy an investment property is generally deductible against that income. Money borrowed for a car or a holiday is not.

Now picture two people, both with $100,000 spare against a home loan, who later move out and rent the property.

  • The one who used offset withdraws their $100,000 for the deposit on the next home. The investment loan balance goes back up to what it was, and that borrowing was always for the property now producing rent.
  • The one who used redraw has repaid the loan down to $500,000. Redrawing $100,000 is fresh borrowing, and its purpose is buying the new home to live in — a private purpose. That portion is generally not deductible, and the loan becomes a mixed one, which is messy to apportion for as long as it exists.

Same money. Same interest saved along the way. Very different position at the end, created by a choice made years earlier that felt purely cosmetic at the time.

Tax is your accountant's territory, not ours, and the rules have more nuance than a blog post should pretend to settle. But the structural point is a lending one, and it is why "might you ever rent this out?" is a question worth answering honestly at the start.

So is offset simply better?

Often, but not always, and it is worth being clear about why.

Offset accounts are frequently attached to packaged loans carrying an annual fee. If your spare balance is consistently small, the fee can exceed what the offset saves you. Redraw is more commonly included at no extra cost.

Discipline matters too. Money in an offset is easy to spend, because it is a normal account. Money paid into the loan is deliberately less convenient to get back, and for some people that friction is a feature rather than a flaw. There is no point in a structure that is theoretically optimal and practically ignored.

And not every offset is a full offset. Some are partial, offsetting only a portion of the balance. Worth confirming which you are being offered.

A rough guide

Offset tends to suit you if you keep a meaningful balance, want it genuinely accessible, or there is any prospect the property becomes an investment. That last one carries more weight than the others.

Redraw tends to suit you if your spare cash is modest, you would rather not pay a package fee for a feature you barely use, or you know yourself well enough to want the money slightly out of reach.

You are also not always choosing. Many loans offer both, and a common arrangement is a split — part of the loan structured one way and part the other, so an emergency buffer sits in offset while longer-term extra repayments go against the balance.

Questions worth asking before you sign

  • Is the offset full or partial, and how many accounts can be linked?
  • What does the offset cost — a package fee, a higher rate, or nothing?
  • Is redraw free, and are there minimums or limits on withdrawals?
  • How quickly can I actually get the money out, in practice?
  • Under what circumstances can redraw be reduced or withdrawn?
  • If I fix part of the loan, what happens to both features during the fixed term?

None of these are unusual questions. If they are hard to get a straight answer to, that is information in itself.

The part people get wrong

The mistake is rarely picking the worse feature. It is picking without thinking about the second property.

A first home is often not a forever home. It becomes a rental when the family grows, or when work moves someone interstate, or simply because keeping it made sense. If that is even plausible, the structure you set up on day one is worth twenty minutes of thought — because unwinding it later is somewhere between awkward and impossible.

Everything else here you can change reasonably easily. That one you largely cannot.

Talk to a Sabea broker about how your loan is structured, or read our guide to refinancing if you are wondering whether a move is worth it.

General information only. It does not take your objectives, financial situation or needs into account, and it is not credit or financial advice. Lender policy, rates and eligibility change regularly and vary between lenders — talk to us about your own circumstances before acting on anything here.