Self-Employed Retirement Plans Estimate the maximum contribution amount for a Self-Employed 401(k), SIMPLE IRA, or SEP. 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 Pullbacks, Corrections, and Bear Markets When the market experiences volatility, it may be a good time to review these common terms. Should I Pay Off Debt or Invest? This calculator will help determine whether you should invest funds or pay down debt. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important.