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 Debt Stress There’s a link between debt and stress. SECURE Act 2.0: An Overview The second iteration of the SECURE Act brings forward several changes to the world of retirement. Pullbacks, Corrections, and Bear Markets When the market experiences volatility, it may be a good time to review these common terms.