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 Protecting Your Business from the Loss of a Key Person Business owners may be able to protect themselves from the financial consequences of losing a key employee. How to Read Your Credit Report Solve a mystery while learning how important your credit report is with this story-driven interactive. TIPS for Inflation If you are concerned about inflation and expect short-term interest rates may increase, TIPS could be worth considering.