Frequently Asked Questions
The deferral of the withholding of the Social Security tax for service members will be effective for mid-month pay September.
Note, the Social Security and Medicare tax are generally calculated at 6.2% and 1.45% of basic pay, respectively. If a military member is contributing to the Montgomery GI Bill (MGIB), the calculation is slightly different. See the question on how to calculate the tax deferral within the FAQs for more information on the MGIB impact to social security taxes.