Consumer credit increased by $21.3 billion in December to $3.549 trillion, the Federal Reserve reported Friday.
In November, consumer credit rose an unrevised $14.0 billion to $3.526 trillion.
Economists polled by Thomson Reuters predicted a $16.0 billion increase in the month.
Revolving credit outstanding in December edged up to $935.6 billion from $929.8 billion the previous month.
Non-revolving credit rose to $2.611 trillion from $2.596 trillion.
Revolving credit includes credit card debt. Non-revolving debt includes automobile loans, loans for mobile homes, education, boats, trailers, or vacations.