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 Should I Invest in Gold? Learning more about gold and its history may help you decide whether it has a place in your portfolio. Questions to Consider When Buying a Vacation Home Doing your research is key before buying a vacation home. Estate Strategies of the Rich and Famous The examples of famous celebrities underline the need for a clear estate strategy.