If you have a home loan balance of $500,000 and have $30,000 in your offset account, you'll only pay interest on a home loan balance of $470,000. You won’t earn interest on the $30,000 in the offset account; instead, that $30,000 is offsetting the interest charged on your home loan.
Even though you don’t earn interest with an offset account, your money is still working hard for you. The point of an offset account is to reduce the amount of borrowed money on which you are paying interest and to shorten the lifetime of your loan.
Maximise your mortgage offset account by having your salary deposited into your account every pay day. It doesn’t matter if you have thousands of dollars or only a small amount saved - every dollar in your offset account reduces the interest you’ll pay on your home loan.