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 Where Will Your Retirement Money Come From? Retirement income may come from a variety of sources. Here's an overview of the six main sources. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Insurance Needs Assessment: When You're Young and Single Even if you’re young and single, you should still consider protecting yourself.