how to calculate the salary for : person whos annnual salary is 70 000. social security is 6.2% on the first 128400 of earnings in calendar year-per employee. Medicare 1.455 no upper limit and per employee. ederal unemployement 6% on the first 7000 in calendar year per employee. State unemployment 2.7% on the fisrt 7000 in calendar year per employee . Federal income tax whitheld 12%