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 Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government. How Income Taxes Work A quick look at how federal income taxes work.