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 Are You Ready for Your Portfolio to Make a Difference? Learn about the rise of Impact Investing and how it may benefit you. How to Appeal Your Property Taxes For homeowners who think their property taxes are too high, there are ways to appeal. Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards.