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 Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Should I Buy or Lease an Auto? This calculator compares the financial impact of leasing versus buying an automobile. The Three Keys to a Great Password Have fun and learn how to craft the perfect password with the help of this highly engaging infographic.