POV: Pay Debt or Invest?

In this example, an $8,000 card balance at 22% a year costs about $1,760 in interest per year, so paying it down is a guaranteed 22% saved, compared with an illustrative, uncertain 7% from investing. After the card is gone, the same $400 a month invested for 3 years at 7% is about $15.4K. A low-rate loan can be a different decision. Everyone is on their own path.