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 Global vs. International: What’s the Difference? International funds invest in non-U.S. markets, while global funds may invest in U.S. stocks alongside non-U.S. stocks. A Living Trust Primer Living trusts are popular, but their appropriateness will depend upon your individual needs and objectives. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government.