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 Lifetime of Earnings Estimate how much you have the potential to earn during your working years. Tuning Your Social Security Benefit When should you take your Social Security benefit? Why Regular Rebalancing Makes Sense Without your knowing, your investment portfolio could be off-kilter.