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 What You Need to Know About Social Security Every so often, you’ll hear about Social Security benefits running out. But is there truth to the fears, or is it all hype? Paying Off a Credit Card Enter various payment options and determine how long it may take to pay off a credit card. SECURE Act 2.0: An Overview The second iteration of the SECURE Act brings forward several changes to the world of retirement.