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 The Latte Lie and Other Myths Check out this video to begin separating fact from fiction. Should I Pay Off Debt or Invest? This calculator will help determine whether you should invest funds or pay down debt. Disability Income This calculator estimates your chances of becoming disabled and your potential need for disability insurance.