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 The Basics of Medicare Learn all about Medicare basics in this informative and insightful article. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences. Social Security Benefits: How Much Will I Receive Calculating your potential Social Security benefit is a three-step process.