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 Big is Money? Learn a little about worldwide currency in this fun infographic How Income Taxes Work A quick look at how federal income taxes work. Jane Bond: Infiltrating the Market Agent Jane Bond is on the case, cracking the code on bonds.