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 Coaches Coaches have helped you your whole life, in ways big and small. We'd like to be one of them. Do Our Biases Affect Our Financial Choices? Even the most seasoned investors have biases affecting their financial choices. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.