Interest Rate Rises in 2026: The Key Mortgage Stress Concerns for Borrowers

The Data: Mortgage Stress Is Climbing Again

Mortgage stress hit a three year low in January 2026, with 23.9% of borrowers at risk, the best reading since early 2023. That relief did not last. Three consecutive rate hikes through the first half of the year reversed much of the improvement.

By June 2026, both measures sat above their December 2025 starting point, and extreme stress had climbed past the previous cyclical peak recorded in June 2024, a genuinely concerning signal given rates were still lower in 2024 than they are now.

Concern One: The Cumulative Repayment Burden

Individually, each 0.25 percentage point hike sounds manageable. Stacked together, three hikes in five months have made a material dent in household budgets, and that is before accounting for any further move in September or November.

If a further hike lands on 29 September or in November, these figures grow further still. Use our mortgage stress calculator to model your own repayment sensitivity to further rate movements.

Concern Two: The Fixed Rate Revert Shock

The single largest repayment shock in the current cycle is not happening to variable borrowers absorbing rate hikes gradually. It is happening to borrowers whose ultra-low pandemic-era fixed rates are expiring all at once.

Concern Three: Reduced Borrowing Capacity for New Buyers

Rate rises do not only affect existing borrowers. Every hike reduces how much a new applicant can borrow, because lenders must assess serviceability at the current rate plus APRA's mandatory 3% buffer. As advertised rates climb, that assessment rate climbs with them, quietly shrinking borrowing capacity even for buyers who have not yet taken out a loan.

This compounds the affordability squeeze for first home buyers already navigating a difficult deposit environment, and is a key reason many buyers are revisiting their maximum purchase price partway through their search.

Who Is Most Exposed

Mortgage stress is not distributed evenly across the population. Roy Morgan's research consistently points to two groups bearing a disproportionate share of the increase.

The common thread across every concern above is that acting early, before a fixed term expires, before a further hike lands, before arrears begin, preserves far more options than waiting until repayments are already unmanageable.

What Actually Helps

None of the options below are free, but each can meaningfully reduce pressure for a borrower facing genuine repayment strain, and all are worth discussing before missing a payment.

• Refinance before your fixed rate expires, not after. Comparing offers two to three months ahead of expiry avoids defaulting onto a lender's higher standard variable revert rate.
• Ask your current lender for a rate review. Many lenders will match or beat a competitor's offer for existing customers who ask, avoiding refinancing costs entirely.
• Consider a temporary interest-only period. Most lenders allow a short interest-only period during genuine hardship, which lowers repayments while you stabilise your budget, though total interest paid over the loan life increases.
• Contact your lender's hardship team early if you are struggling. Under Australian lending rules, lenders must have a hardship process, and early contact generally produces better outcomes than falling into arrears first.
• Reassess your loan term, not just your rate. Extending a loan term lowers minimum repayments immediately, though it increases total interest paid, a trade-off worth understanding with a broker before committing.