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 Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program. Pullbacks, Corrections, and Bear Markets When the market experiences volatility, it may be a good time to review these common terms.