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 Starting a Roth IRA for a Teen This early financial decision could prove helpful over time. Building a Solid Financial Foundation Sustain financial well-being or create wealth through these actions. Stop Wasting Money One way to find money is to examine your current spending habits and eliminate money wasters.