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 Preparation is the Key to Retirement The simplest ideas can sometimes make a massive difference over time. Enjoy this brief video to learn more. When Should You Take Social Security Monthly Social Security payments differ substantially depending on when you start receiving benefits. Caring for Aging Parents As our nation ages, many Americans are turning their attention to caring for aging parents.