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 Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. Your Changing Definition of Risk in Retirement A change in your mindset during retirement may drive changes to your portfolio.