The amount of social security and Medicare tax withheld from your pay appears in Boxes 4 and 6 of Form W-2 Wage and Tax Statement. There is no limit on the amount of wages subject to the Medicare tax (1.45%), but there is a maximum amount of wages subject to social security tax (6.2%).
The maximum amount of wages subject to the social security tax each year:
Note that any link in the information above is updated each year automatically and will take you to the most recent version of the webpage or document at the time it is accessed.