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 Tax Strategies for Retirement Account Withdrawals Retirement accounts come with plenty of benefits, such as tax deductions, and a generally high return on investment. Bi-Weekly Payments This calculator estimates the savings from paying a mortgage bi-weekly instead of monthly. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important.