You can use these credits to offset income you receive above that amount in the fortnights where you earn more. This helps you keep more of your payment if the amount you earn changes each fortnight.
You don’t need to do anything to use Income Bank. It shows up in your Centrelink online account and will change as you report your income.
Example
Sarah does paid casual work during uni holidays and uses the money she saves while she’s studying. She doesn’t work during her uni semesters.
Sarah earns credits in her Income Bank during uni semesters while she isn’t earning any income. She’ll use the credits in her Income Bank when she works during her semester breaks and earns over $509 a fortnight.