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 Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors. Saving for Retirement This calculator can help you estimate how much you may need to save for retirement. How to Retire Early Retiring early sounds like a dream come true, but it’s important to take a look at the cold, hard facts.