Commonwealth Bank of Australia (CBA), the country's largest lender, reported an 8% rise in first-quarter cash profit, but the numbers behind the headline tell a more cautious story. Home loan applications dropped 16% and arrears ticked up, suggesting that higher interest rates are beginning to weigh on borrowers and dampen demand for new mortgages.
For the three months ended September 30, CBA's cash profit came in at A$2.8 billion, helped by stronger lending and deposit volumes. Business lending grew 13.6% and household deposits rose nearly 8%, providing a solid base. But the weakness in new mortgage demand is a red flag, especially since mortgages are a core earnings engine for Australian banks.
Why mortgage demand is cooling
The drop in home loan applications follows earlier tax changes and comes with Australia's policy rate sitting at an 18-year high of 4.85%. Higher borrowing costs naturally make home buying less affordable, and many potential buyers are holding off. This slowdown in new lending matters because it reduces the flow of fresh, typically lower-risk mortgages that banks rely on to grow their loan books.
At the same time, existing borrowers are rolling off fixed-rate loans onto higher variable rates, which means their monthly repayments are climbing. That combination—fewer new loans and higher repayments on old ones—can squeeze a bank's growth and profitability over time.
Early signs of stress
CBA also flagged early signs of financial strain among its customers. Home loan arrears—payments that are late—edged up by 7 basis points. While that's a small move, arrears usually rise with a lag after rate hikes. As more borrowers struggle to keep up, banks may need to set aside extra money to cover potential losses, known as expected credit loss provisions.
Even if the net interest margin—the spread between what a bank earns on loans and pays on deposits—holds steady, the next swing factor for profits could become credit costs rather than loan growth. In other words, the focus shifts from how much a bank can lend to how much it might lose.
What it means for investors
For markets, CBA's 7-basis-point uptick in arrears could matter more than its 8% profit rise. A 16% drop in applications is less about today's revenue and more about what it implies for the credit cycle. If arrears keep creeping up, investors will watch for higher bad-debt charges, which can eat into earnings even when margins look stable.
CBA's common equity Tier 1 capital ratio of 11.5% provides a buffer, but the market narrative often shifts quickly from “how resilient is margin?” to “how fast are credit losses building?” once arrears start moving. That shift can affect how investors value the stock and the broader banking sector.
For everyday investors, this is a reminder that bank profits aren't just about growth—they're also about risk. When rates are high, the quality of a bank's loan book becomes just as important as its ability to attract new business. Watching arrears and bad-debt charges can give a clearer picture of what's really happening beneath the surface.
As the housing market cools and borrowers feel the pinch, CBA's results offer a window into the broader Australian economy. The bank's performance is often seen as a bellwether for consumer health, and these numbers suggest that while the economy is still growing, the strain from higher rates is starting to show.
Investors will likely keep a close eye on upcoming updates from CBA and its peers for further signs of stress. The next few quarters will reveal whether this is a temporary blip or the beginning of a more pronounced slowdown in lending and a rise in credit costs.
