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 How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits. What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month. Prevent a Rift: Money Tips for Newlyweds Couples may be able to head off many of the problems in a marriage that money can cause.