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 Tax Deductions You Won't Believe Here are some examples of deductions from the IRS that were permitted and some that were, uh, too creative. Behavioral Finance An amusing and whimsical look at behavioral finance best practices for investors. The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out.