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. Related Content Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. Getting a Head Start on College Savings A few strategies that may help you prepare for the cost of higher education. Why Regular Rebalancing Makes Sense Without your knowing, your investment portfolio could be off-kilter.