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 Is Term Life Insurance for You? Term insurance is the simplest form of life insurance. Here's how it works. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit.