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 Coaches Coaches have helped you your whole life, in ways big and small. We'd like to be one of them. Why You Should Invest in Your 401(k) Did you know that your savings can compound over time? Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate.