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 Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. Helpful Retirement Strategies for Women Learn how to address the challenges that women face when planning for retirement. Disability and Your Finances In the event of an unforeseen accident or illness, disability insurance may be a good way to protect your income and savings.