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 Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. When Special Care Is Needed: The Special Needs Trust A special needs trust helps care for a special needs child when you’re gone.