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 Making a Charitable Contribution There are benefits and limitations when you decide to donate stock. Getting a Head Start on College Savings A few strategies that may help you prepare for the cost of higher education. Stop Wasting Money One way to find money is to examine your current spending habits and eliminate money wasters.