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 How Boomers and Millennials Differ The YOLO Economy is a focus on experiences over material possessions, prompting Boomers to consider a similar mindset. The Cost of Procrastination Don't let procrastination keep you from pursuing your financial dreams and goals. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions.