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 How to Make the Tax Code Work for You When you take the time to learn more about how it works, you may be able to put the tax code to work for you. Deciding When to Take Social Security One of the most common questions people ask about Social Security is when they should start taking benefits. Should You Ever Retire? A growing number of Americans are pushing back the age at which they plan to retire. Or deciding not to retire at all.