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 What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement. What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement. Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference?