Understanding the Cash Rate and Mortgage Repayments
The Reserve Bank of Australia (RBA) sets the official cash rate, which influences the interest rates that lenders charge on variable-rate home loans. When the RBA changes the cash rate, lenders typically adjust their variable rates, directly affecting your monthly repayments. This article explains how a 2026 RBA rate decision can flow through to your mortgage, using examples for different loan amounts.
Example: How a Rate Change Affects Monthly Repayments
To illustrate the impact, consider a variable-rate home loan of $500,000 with a 30-year term. The following table shows how a 0.50 percentage point increase or decrease in the interest rate would change your monthly repayment.
| Loan Amount | Interest Rate Change | Monthly Repayment Change |
|---|---|---|
| $500,000 | +0.50% | +$148 |
| $500,000 | -0.50% | -$148 |
| $750,000 | +0.50% | +$222 |
| $750,000 | -0.50% | -$222 |
| $1,000,000 | +0.50% | +$296 |
| $1,000,000 | -0.50% | -$296 |
These estimates are based on the standard amortisation formula and assume your interest rate changes by the same amount as the cash rate move. Actual lender adjustments may vary.
What to Consider When Rates Change
- Your variable rate may change immediately or after a short delay following an RBA decision.
- Fixed-rate loans are not directly affected by cash rate changes until the fixed period ends.
- If your repayments increase, you may need to adjust your budget to maintain your loan schedule.
- A rate decrease could allow you to keep the same repayment amount to pay off your loan faster.
Further Steps
If you are unsure how your specific loan will be affected, it is advisable to speak with your lender or a mortgage broker. They can provide a more precise estimate based on your loan details.
For more information on managing your home loan, see our 2026 Australia Property Loan Guide.