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 Should You Ever Retire? A growing number of Americans are pushing back the age at which they plan to retire. Or deciding not to retire at all. A Living Trust Primer Living trusts are popular, but their appropriateness will depend upon your individual needs and objectives. Three Key Questions to Answer Before Taking Social Security When to start? Should I continue to work? How can I maximize my benefit?