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 Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. How to Appeal Your Property Taxes For homeowners who think their property taxes are too high, there are ways to appeal. Password Protection Strategies Simple steps may help you foil hackers and protect your privacy.