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 Comparing Mortgage Terms Estimate the total cost in today's dollars of various mortgage alternatives. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences. How to Retire Early Retiring early sounds like a dream come true, but it’s important to take a look at the cold, hard facts.