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 Question Thank you! Oops! Related Content Retirement Is a Beginning Key questions to answer when you are considering retirement. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. Inflation & Retirement Estimate how much income may be needed at retirement to maintain your standard of living.