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. How to Read Your Credit Report Solve a mystery while learning how important your credit report is with this story-driven interactive. 3 Estate Challenges for Blended Families This article will help your clients with blended families think and prepare their estate strategy.