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 How to Read Your Credit Report Solve a mystery while learning how important your credit report is with this story-driven interactive. Building Your Legacy A four-step framework for building a personal legacy. What's My 2023 Tax Bracket? Check out this handy reference of updated ranges from the IRS in case your designated bracket has changed.