consulting and training) under the same contract for the purposes of customizing the. product, or product roll-out and implementation, the agency may be able to purchase. those services up to 20% of the value of the product and first year's maintenance.
The Social Security tax is a flat tax rate of 6.2 percent on your wage income up to $118,500 as of 2017. Any wages you earn over $118,500 aren't subject to the Social Security tax, so the figure shown in Box 4 should be no more than $7,347.00, the $118,500 maximum wage base times 6.2 percent.
How do you calculate the social security tax percentage? To calculate the social security tax percentage as of 2015, add the 6.2 percent rate for the employer and the 6.2 percent rate for the employee, which totals 12.4 percent of wages, states the Internal Revenue Service. Social Security tax has a wage base limit of $118,500 for 2015 earnings.