A strong month in business can leave you with spare personal cash. A quieter month can make you want it back. Where you keep that money can change both your mortgage interest and how easily you can reach it.
An offset is worth investigating if you regularly hold personal savings and want everyday access. Redraw may be enough if you mainly want to make extra repayments and the access conditions suit you. The useful comparison is the saving after costs, using the balance you normally keep.
The same goal, different access
As ASIC's Moneysmart explains, an offset is a separate account linked to your mortgage. Its balance reduces the loan amount on which interest is calculated. With a 100% offset, $30,000 held against a $600,000 mortgage would leave $570,000 attracting interest while those balances remain unchanged.
Redraw starts with extra money paid into the loan itself. Whether you can take those extra repayments back, and when, depends on the loan terms. Before relying on it for urgent bills, check access limits, processing times and fees.
Either feature can reduce interest. The distinction becomes practical when you need to pay school fees tomorrow, cover a personal emergency or draw on savings through a quieter period. Choose access you understand, rather than assuming every redraw facility behaves like a transaction account.
Price the cash you actually keep
Here is a simplified hypothetical comparison, not a lender quote. Assume a $600,000 loan, a steady $30,000 personal cash balance and no fees. A redraw loan at 6% with $30,000 paid in advance would attract about $34,200 in annual interest on the resulting $570,000 balance. A 100% offset loan at 6.10% with $30,000 in the offset would attract about $34,770.
In that snapshot, the offset costs about $570 more a year for the access and features it provides. It is not saving you money compared with keeping the same $30,000 available through redraw on the cheaper loan. Whether the difference is worthwhile depends on those access rules and your needs.
For a different comparison, suppose the alternative is leaving that $30,000 in a non-interest-bearing account beside the 6% loan. Interest on the full $600,000 would be about $36,000. The offset then looks more attractive. The answer changes because the alternative use of the money changes.
These are annual interest estimates on constant balances. Actual loans use changing balances and repayment schedules, and lenders commonly calculate interest daily. The examples exclude tax and savings-account earnings. Use actual quotes and a realistic average cash balance for your decision, not your bank balance on its best day.
Two market comparisons to investigate
For borrowers who meet Athena's standard full-documentation criteria, Athena Straight Up and Power Up provide a useful feature comparison: Straight Up has redraw without offset, while Power Up includes offset and multi-offset accounts. Obtain rates for the same borrowing scenario before deciding what the added features are worth. These are separate from the lender's Tailored range, covered in our Athena self-employed guide.
Pepper Money's variable loans advertise a 100% interest offset sub-account with a monthly fee, alongside free online redraw. That is a different cost structure to investigate if Pepper's income assessment fits your circumstances. Ask for the fee and the particular product's access terms. Our Pepper Money guide explains the broader comparison.
Keep the money boundaries clear
This comparison concerns personal savings you are entitled to use. Company money, trust money and amounts needed for business obligations are not automatically spare personal cash. Ask your accountant before moving money between those accounts. If the property may become a rental, also obtain tax advice before making extra repayments or redrawing.
For your next self-employed refinance comparison, bring three months of personal balances and two written loan quotes. Calculate the average cash you could retain, subtract the extra interest and fees, and check how access works when you need it. After settlement, confirm the offset is linked to the intended loan. A feature is useful only when it is working and worth its cost.