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 Will Power Preparing for the eventual distribution of your assets may not sound enticing. But a will puts the power in your hands. Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. Retirement Accounts When You Change Your Job This video discusses issues related to your retirement accounts when you move on from your job.