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 Historical Inflation This calculator shows how inflation over the years has impacted purchasing power. Navigating Retirement Pitfalls Why are they made again and again? Making sense of these errors in judgement. Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards.