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 The Other Sure Thing Though we don't like to think about it, all of us will make an exit sometime. Are you prepared? Estate Planning Checklist A comprehensive estate plan is vital for families with significant assets. The checklist can help ensure nothing is left out. Roth 401(k) vs. Traditional 401(k) This calculator compares employee contributions to a Roth 401(k) and a traditional 401(k).