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 Medicare Advantage 101 Overview of Medicare Advantage, what’s in them, special rules, and more. Budget Check Up: Tax Time Is the Right Time Tax preparation may be the perfect time to give the household budget a check-up. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important.