7. most people in the united states pay social security taxes. the employee’s and employer’s rate (percent) in 2015 is 6.2% on the first $118,500 of income. all income in excess of $118,500 is not taxed for social security purposes. you should note that the employer also contributes 6.2% of your wages! a. what is the effective social security tax rate (percent) in 2014 for a person earning $25,000 a year? 6.2% b. what is the effective social security tax rate for a person earning $100,000 a year? 6.2% c. what is the effective social security tax rate for a person earning $231,000 a year?