No law in the United States requires two weeks. The custom has no legal force.
The two-week notice, the practice of informing an employer fourteen days before leaving a job, is one of the most widely observed customs in American working life with no statutory basis.1 No federal law requires it. No state law mandates it. It is a social norm, reinforced by employer expectations and employee handbooks, that functions as if it were law.
The practice emerged during the twentieth century as employment relationships became more formalized and at-will employment, the legal doctrine allowing either party to end the relationship at any time for any reason, became the default in most American states.2
At-will employment means that technically, a worker can leave without any notice, just as an employer can terminate a worker without warning. The two-week convention developed as a professional courtesy that softened the abruptness of at-will departure, giving employers time to redistribute work or begin hiring a replacement.
Many other countries have legally mandated notice periods. In Germany, the statutory minimum notice period is four weeks.3 In the United Kingdom, the minimum is one week after one month of employment, increasing with tenure. In France, notice periods are typically one to three months depending on the employee's classification.
The asymmetry of the American arrangement is notable. Workers are expected to give notice, but employers are not required to reciprocate. Layoffs and firings frequently occur without advance warning, and in some cases workers are escorted from the building on the same day they are informed.2
The social pressure to observe the two-week convention is enforced not through law but through consequences. Workers who leave without notice risk losing a positive reference, forfeiting accrued benefits in some cases, or being marked as ineligible for rehire.
The custom's power is a demonstration of how norms can function as effectively as laws. Millions of American workers observe the two-week notice believing it to be a legal requirement, which gives the practice the same practical force as a statute, without the reciprocal protections that legislation would provide.