Should I Pay Off Debt or Invest? This calculator will help determine whether you should invest funds or pay down debt. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content How Stocks Work Understanding how a stock works is key to understanding your investments. The Sequence of Returns A look at how variable rates of return impact investors over time. Perception vs. Reality There’s an alarming difference between perception and reality for current and future retirees.