The RBA’s Cash Rate Decision
The Reserve Bank of Australia sets the official cash rate, which influences the interest rates lenders charge on variable-rate home loans. When the cash rate changes, lenders may adjust their variable rates accordingly, and this flow-through affects your monthly mortgage repayments.
How Rate Changes Affect Your Repayments
The size of the impact depends on your loan balance and the rate change. A larger loan amount means a bigger dollar change in repayments for the same rate move. However, the exact effect varies by lender, as they are not obligated to pass on the full change.

Example Scenarios for Different Loan Amounts
To illustrate the potential impact, let’s consider a hypothetical 0.25 percentage point rate change on different loan balances. These figures are illustrative only and assume the full change is passed on.

- $300,000 loan: A 0.25% rate increase adds roughly $49 per month to your repayments.
- $500,000 loan: The same 0.25% increase raises monthly repayments by about $81.
- $750,000 loan: A 0.25% increase adds approximately $122 per month.
Conversely, a rate cut would reduce repayments by similar amounts.
What to Do Next
If you want to understand how a rate change might affect your specific situation, talk to a lender or a mortgage broker. They can provide tailored calculations based on your loan terms and balance. For more details on mortgage options, you can explore our guides on Australia home loan and property financing or Australia home loan strategies.