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 Tuning Your Social Security Benefit When should you take your Social Security benefit? Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible. Financially Savvy at Six Figures Help your clients with these practical steps to make the most of their six-figure income.