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 Bursting the Bubble Tulips were the first, but they won’t be the last. What forms a “bubble” and what causes them to burst? Yours, Mine, and Ours: Estate Strategies for Second Marriage Second marriages are a trigger event to revisit any existing estate strategies. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.