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 Year-End Charitable Gifting and You This article may help you maximize the benefits of your donation for your chosen charity. Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA. A Look at Diversification Diversification is an investment principle designed to manage risk, but it can't prevent against a loss.