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 Question Thank you! Oops! Related Content Four Reasons Millennials Need an Estate Strategy Estate strategies for millennials may sound like less of a concern than retirement, but young adults should prepare now. Building a Solid Financial Foundation Sustain financial well-being or create wealth through these actions. Retirement Plan Detectives A couple become Retirement Plan Detectives, searching records from old employers.