Why Do Rate Hikes Push People Into Card Loans? — The Hidden Danger of Revolving Credit

Whenever the Bank of Korea raises its benchmark rate — or even hints at one — a familiar headline tends to follow: "Card loan and revolving balances climb." Why would higher rates drive more people into credit card debt? Intuitively, it seems like it should work the other way.

Higher rates make banks tighter

When the base rate rises, banks become more cautious about lending — the risk of defaults goes up. They raise the bar on loan approvals and tighten credit standards. People with lower credit scores or unstable incomes are most likely to get turned away.

But the need for cash doesn't disappear. That's when card loans become attractive. Credit card companies tend to lend to almost anyone with an active card — no separate approval needed. The catch? Card loan rates typically run 15–20% annually, three to four times higher than bank loans.

How does this affect stocks and the broader economy?

Rising card loan balances send two signals. First, household debt is building up. High-interest debt squeezes the money people have left over for spending — and when consumption in restaurants, retail, and travel shrinks, corporate revenues fall and stock prices can feel the pressure.

Second, there's a financial system risk. If the economy turns and card loan delinquencies spike, card companies come under stress. At scale, this can cascade into a broader financial crisis — Korea lived through exactly that in the 2003 credit card crisis. That's why analysts always watch household debt trends when the Bank of Korea raises rates.