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. What Is My Current Net Worth? Use this calculator to estimate your net worth by adding up your assets and subtracting your liabilities. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return.