APRA's decision comes in response to concerns that a significant portion of new loans are being granted to borrowers with high DTI ratios, potentially exposing the financial system to greater risk in the event of economic downturns. By implementing this cap, APRA seeks to promote more prudent lending practices and enhance the resilience of both borrowers and lenders.

While the cap applies to both owner-occupier and investor loans, it is expected to have a more pronounced impact on property investors, who have been increasingly active in the market. Recent data indicates that investors accounted for two out of every five new home loans in the third quarter of 2025, highlighting the need for regulatory measures to address potential overheating in the property sector.

Financial analysts suggest that this policy is a proactive step to prevent the accumulation of excessive risk within the housing market. However, some experts believe that the immediate effect on lending growth and property prices may be limited, as many banks already maintain lending practices within the new thresholds.

As the implementation date approaches, both lenders and borrowers will need to adjust to the new regulatory environment. Prospective homebuyers, particularly those with higher DTI ratios, may find it more challenging to secure financing, underscoring the importance of careful financial planning and consideration of borrowing capacities.