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 Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. The Other Sure Thing Though we don't like to think about it, all of us will make an exit sometime. Are you prepared? Protecting Your Business from the Loss of a Key Person Business owners may be able to protect themselves from the financial consequences of losing a key employee.