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 Dog Bites Neighbor. Now What? Even dogs have bad days. So, what happens when your dog bites a neighbor or passing pedestrian? Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate.