The Labor Department estimated that an additional 4 million lower-paid salary workers would become eligible for overtime protections in the first year under the new rule.

The overtime rule is one of the furthest-reaching economic reforms that President Joe Biden has pursued unilaterally through the federal rulemaking process. It would dramatically expand the share of workers who are entitled to time-and-a-half pay when they work more than 40 hours in a week.

The rule would have required employers to pay overtime premiums to salaried workers who earn less than $1,128 per week, or about $58,600 per year, when they work more than 40 hour