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 Making a Charitable Contribution There are benefits and limitations when you decide to donate stock. Saving for College This calculator can help you estimate how much you should be saving for college. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences.