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 Question Thank you! Oops! Related Content Why You Should Invest in Your 401(k) Did you know that your savings can compound over time? A Decision Not Made Is Still a Decision Investors who put off important investment decisions may face potential consequence to their future financial security. Do Our Biases Affect Our Financial Choices? Even the most seasoned investors have biases affecting their financial choices.