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 What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver. Retirement Accounts When You Change Your Job This video discusses issues related to your retirement accounts when you move on from your job.