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 Life and Death of a Twenty Dollar Bill How long does a $20 bill last? When to Self-Insure Choosing to bear the financial burden of an adverse event is called self-insuring. Do you know what that entails? Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible.