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. Countdown to College Preparing for college means setting goals, staying focused, and tackling a few key milestones along the way. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money.