The most common reason why Medicare wages (Box 5) are higher than State wages (Box 16) is due to 401(k) contributions (W2, Box 12, Code D) or other pre-tax retirement plan contributions. They are subject to Medicare tax, but not to federal or state income tax.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"