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 Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. 8 Financial Milestone Birthdays Get ready to celebrate your financial birthdays in this informative infographic. The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are.