A minimum payment can give a balance a long tail

A minimum payment keeps an account moving, but it is not designed to describe the fastest or cheapest route to zero. When interest continues to accrue, smaller payments leave more principal in place for longer. That is why credit-card statements include repayment disclosures, and why the Consumer Financial Protection Bureau teaches duration and total cost together.

Rates, formulas and personal constraints differ, so no single example belongs to every borrower. The useful reading habit is simply to notice time as well as this month's amount. A payment can be manageable in the present while extending the distance over which interest has room to operate.