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 The Half Million Dollar Baby The true cost of raising a child may be far more than you expect. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government. Once Upon a Goal Do you know how to set up your financial goals for success? This knight does.