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 Emotional vs. Strategic Decisions Information vs. instinct. Are your choices based on evidence of emotion? The Three Keys to a Great Password Have fun and learn how to craft the perfect password with the help of this highly engaging infographic. Managing an Inheritance A windfall from a loved one can be both rewarding and complicated.