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 Tuning Your Social Security Benefit When should you take your Social Security benefit? Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Should You Tap Retirement Savings to Fund College? There are three things to consider before dipping into retirement savings to pay for college.