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 Message Thank you! Oops! Related Content Creative Ways to Motivate Your Employees Five creative (and inexpensive) ideas for motivating your employees. The Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does. Global vs. International: What’s the Difference? International funds invest in non-U.S. markets, while global funds may invest in U.S. stocks alongside non-U.S. stocks.