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 What You Need to Know About Social Security Every so often, you’ll hear about Social Security benefits running out. But is there truth to the fears, or is it all hype? Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction. Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA.