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 Dreaming Up an Active Retirement When you retire, how will you treat your next chapter? Find That Lost Retirement Account With over 24 million “forgotten” 401(k) accounts, you may be surprised to learn of your unclaimed “found” money. Why Medicare Should Be Part of Your Retirement Strategy How Medicare can address health care needs in your retirement strategy.