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 Net Unrealized Appreciation (NUA) Explained Have you considered the special tax treatment on company stock held in a 401(k) plan? Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program. The Financial Literacy Crisis Many Americans are operating their personal finances with only the barest minimum of knowledge.