Westpac Banking Corp. mortgage applications are on track for their weakest quarterly performance in a year, as new tax policies targeting property investors erode demand in Australia's real estate market. The decline reflects shifting investor sentiment following regulatory changes that have made property investment less attractive.

The bank's lending business faces pressure from measures that increase holding costs for real estate investors. These tax adjustments appear to be cooling what was previously a hot market segment, with investors pulling back from new mortgage commitments. Property investment has been a significant driver of Australia's housing market activity.

For Westpac, this represents a material headwind to one of its core lending operations. Mortgage lending typically generates substantial fee income and interest revenue for major banks, making any sustained decline in applications a concern for earnings. The trend suggests broader implications for Australia's financial sector.

The development signals that regulatory tightening on property investors is achieving its intended effect of cooling the real estate market. However, it also demonstrates how quickly government policy changes can impact bank operations and lending volumes, creating uncertainty for financial institutions that rely on property market activity.