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 Spotting Credit Trouble The wise use of credit is a critical skill. These 10 questions will help you assess your skill level. The Wild West of Data Theft Learn about cyber liability insurance in this entertaining video. Consider Keeping Your Life Insurance When You Retire Reasons to retain your coverage into your retirement years.