PaulaM
Employee Tax Expert

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All three boxes would be reduced by the same amount if you paid for your health insurance premiums via a cafeteria plan (sec. 125). 

Cafeteria plans are exempt from Social Security, Medicare and income tax. Therefore, all three boxes would have the same (pre-tax) amount.

http://smallbusiness.chron.com/payroll-deductions-allowed-before-calculating-social-security-tax-615...

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