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 Estate Management Checklist Is your estate in order? This short quiz may help you assess your overall strategy. Do Our Biases Affect Our Financial Choices? Even the most seasoned investors have biases affecting their financial choices. Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic.