Let's first address the facts about the Federal Retirement System...
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Employees under the Civil Service Retirement System, which generally covers employees first hired before 1984, pay 7 percent of their salary into the federal retirement fund. They don’t pay Social Security payroll taxes, nor do they earn a Social Security benefit through their federal service. Their entire retirement benefit comes from the civil service fund, unless they earn a Social Security benefit from employment elsewhere. If they do, that benefit is reduced in most cases.
Employees first hired in 1984 and after generally are in the Federal Employees Retirement System. They earn the same Social Security benefit and pay the same Social Security contribution as other workers. Typically that is 6.2 percent of salary, although in 2011 and 2012 (now that a full-year extension has been signed) it is 4.2 percent. In addition, they pay 0.8 percent toward a civil service benefit that is worth roughly half the value of a CSRS annuity for an employee with a similar work record. Some employees, primarily in law enforcement, firefighting and air traffic control, pay an additional 0.5 percent of salary toward their civil service benefit, and receive an enhanced annuity.
Under a bill President Obama signed, those newly hired into the federal government in 2013 and after, and who don’t have at least five years of prior federal service, will have to pay an additional 2.3 percent of salary toward their civil service retirement benefit. That means the total required contribution toward that benefit will be 3.1 percent of salary for most of them. Current employees would not be affected.
More info at: https://www.washingtonpost.com/blog...3/gIQArFxsVR_blog.html?utm_term=.13dc66e73739