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 The Power of Compound Interest Learn how to harness the power of compound interest for your investments. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return. The Cycle of Investing Understanding the cycle of investing may help you avoid easy pitfalls.