The Bank of Canada says it clearly: credit card delinquencies and balances rise well before a household misses a mortgage payment. It's the earliest warning signal of financial distress. When people start putting gas, groceries and bills on the card, there's no margin left in the budget.
Unlike mortgage debt (planned, low-rate), a credit card balance costs around 20% interest. Carrying it month to month means paying dearly just to survive β a choice no one makes when things are fine.