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 Investing for Impact Learn how to build a socially conscious investment portfolio and invest in your beliefs. Best-Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic.