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 Inflation & Your Money It's important to understand how inflation is reported and how it can affect investments. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important. Tuning Your Social Security Benefit When should you take your Social Security benefit?