Tax Withholding Information
Employees may change their state and federal income tax withholding allowance at any time during the year by completing for federal tax withholding changes and for state withholding changes.
- Individual Federal and State ​Income Tax rates are determined by the W4 form completed by the employee.
- Employees can complete the DE-4 to withhold different tax amounts for the State.
- The Medicare rate is 1.45% and effective November 1, 2013 an additional .9% on wages earned in excess of $200,000.
- The Social Security rate is 6.2% on the first $128,400 wages earned.
- The State Disability Insurance (SDI) rate is 1.0% on the first $114,967 wages earned. The 91ÁÔÆæ Research Foundation pays for the employee SDI tax as an added fringe benefit. The maximum SDI contribution is $1,149.67.
The Affordable Care Act requires employers to report employer sponsored health coverage amounts ​in box 12DD of W-2. This reporting requirement is for information only and bears no tax consequence.