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 Extended Care: A Patchwork of Possibilities What is your plan for health care during retirement? When Do You Need a Will? When do you need a will? The answer is easy: Right Now. The Junk Drawer Approach to Investing It's easy to let investments accumulate like old receipts in a junk drawer.