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 Keeping Good Records is Good Business Maintaining good records for your business not only helps to meet your tax and legal obligations, but it can save you money. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Insurance Needs Assessment: When You're Newly Married Marriage changes everything, including your insurance needs.