Australian Mortgage Repayments & Interest Rate Guide (2026–27)

Buying a home is the largest financial commitment most Australian households will make. Understanding how interest rate fluctuations, repayment frequencies, and loan terms impact your monthly mortgage bill is vital.

Principal & Interest vs Interest-Only Repayments

1. Principal & Interest (P&I)

Your regular payment covers both the interest charged by the lender and a portion of the loan principal. Over a standard 30-year term, your loan balance steadily decreases to zero.

2. Interest-Only (I-O)

You only pay the monthly interest accrued on the loan balance. Your principal balance remains unchanged. Interest-only periods are typically capped at 1 to 5 years and carry slightly higher interest rates.

The Power of Fortnightly Repayments

By switching from monthly repayments to fortnightly repayments (calculated as half your monthly repayment), you make 26 half-payments per year.

This equals 13 full monthly payments each year, reducing a 30-year mortgage by 3 to 4 years and saving ,000+ in total interest.

Calculate Your Home Loan Repayments

To model your monthly or fortnightly mortgage repayments under different interest rate scenarios, use our free Mortgage Repayment Calculator and Home Loan Calculator.