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 Question Thank you! Oops! Related Content Raising Healthy Children Healthy habits are one of the greatest gifts to give your child. The Junk Drawer Approach to Investing It's easy to let investments accumulate like old receipts in a junk drawer. The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route.