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 Potential Income from an IRA Estimate your monthly and annual income from various IRA types. Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic.