The General Schedule (GS) is the predominant pay scale within the United States civil service. The GS includes the majority of white collar personnel (professional, technical, administrative, and clerical) positions. As of September 2004^[update], 71 percent of federal civilian employees were paid under the GS. The GG pay rates are identical to published GS pay rates.

The remaining 29 percent were paid under other systems such as the Federal Wage System (WG, for federal blue-collar civilian employees), the Senior Executive Service and the Executive Schedule for high-ranking federal employees, and other unique pay schedules used by some agencies such as the United States Securities and Exchange Commission and the Foreign Service. Starting in 2009^[update], some federal employees were also paid under Pay Bands.

The GS was enacted into law by the Classification Act of 1949, which replaced Classification Act of 1923. The GS is now codified as part of Chapter 53 of Title 5 of the United States Code sections 5331 to 5338 (5 U.S.C. §§ 5331–5338). The pay scale was originally created with the purpose of keeping federal salaries in line with equivalent private sector jobs. Although never the intent, the GS pay scale does a good job of ensuring equal pay for equal work by reducing pay gaps between men, women, and minorities, in accordance with another, separate law, the Equal Pay Act of 1963. ^{[citation needed]}

Prior to January 1994, GS personnel were generally paid the same amount (for a given grade and step) regardless of where they worked. This system ignored the growing reality of regional differences in salaries and wages across the United States, and this led to a perception that in many locations federal civil service salaries were increasingly uncompetitive with those in the private sector, thus affecting recruiting and retention efforts by federal agencies. In January 1994, the Federal Employees Pay Comparability Act of 1990 (FEPCA) introduced a "locality pay adjustment" component to the GS salary structure. Both Republican and Democratic administrations have complained about the methodology used to compute locality adjustments and the projected cost of closing the pay gap (as determined by FEPCA) between federal salaries and those in the private sector. In December 2007, the President's Pay Agent reported that an average locality pay adjustment of 36.89% would be required to reach the target set by FEPCA (to close the computed pay gap between federal and non-federal pay to a disparity of 5%). By comparison, in calendar year 2007, the average locality pay adjustment actually authorized was 16.88%. As a result, FEPCA has never been fully implemented. ^{[citation needed]}

The United States Office of Personnel Management administers the GS pay schedule on behalf of other federal agencies.

Changes to the GS must normally be authorized by either the president (via Executive Order) or by Congress (via legislation). Normally, the President directs annual across-the-board pay adjustments (including locality pay adjustments) at the beginning of a calendar year after Congress has passed the annual appropriations legislation for the federal government.

Under FEPCA, the Bureau of Labor Statistics conducts annual surveys of wages and salaries paid to non-federal workers in designated locality pay areas. Surveys are used to determine the disparity, if any, between federal and non-federal pay in a given locality pay area. The Federal Salary Council (created by FEPCA) prepares recommendations concerning the composition of the designated locality pay areas and the annual comparability adjustment for each area, as well as an adjustment for all other workers outside these areas, referred to as "Rest of U.S.". The council's recommendations are transmitted to the President's Pay Agent (also created by FEPCA), which then establishes, modifies, or disestablishes individual locality pay areas and makes the final recommendation on pay adjustments to the president, who may either accept the agent's recommendations or (in effect) reject them through the submission of an alternative pay plan.

FEPCA also provides for an automatic annual across-the-board adjustment of GS pay rates. A common misconception is that the annual federal pay adjustments are determined according to cost of living fluctuations and other regional considerations. In fact, the across-the-board adjustments to the GS (but not locality pay) are determined according to the rise in the cost of employment as measured by the Department of Labor's Employment Cost Index, which does not necessarily correlate to the better-known Consumer Price Index, which tracks consumer prices.