Do I have to pay employees for unauthorized overtime?
Yes. If your employees are entitled to overtime payments, you have to pay up, whether the overtime was authorized or not.
The rules on overtime were established by the Fair Labor Standards Act (FLSA), which created the 40–hour workweek when it came into law in 1938.
The FLSA requires employers of a certain size or type (more on this below) to pay overtime of 1.5 times the normal rate to all eligible employees (more on this below too) who work more than 40 hours in any workweek.