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 Managing the Risk of Outliving Your Money Steps to help you sustain and grow your retirement savings. Working With A Financial Professional A financial professional is an invaluable resource to help you untangle the complexities of whatever life throws at you. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates.