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 How Women Can Prepare For Retirement Are women prepared for a 20-year retirement? Find That Lost Retirement Account With over 24 million “forgotten” 401(k) accounts, you may be surprised to learn of your unclaimed “found” money. Replacing Your Medicare Card Learn how to replace your lost, stolen, or damaged Medicare card in this helpful article.