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 Behavioral Finance An amusing and whimsical look at behavioral finance best practices for investors. How the Federal Reserve Works Each day, the Fed is behind the scenes supporting the economy and providing services to the U.S. financial system. The Junk Drawer Approach to Investing It's easy to let investments accumulate like old receipts in a junk drawer.