noun
Compensation paid for work beyond regular hours, typically calculated at a higher rate.
今月の残業手当はいつもより多かった。
This month's overtime pay was more than usual.
残業代 is a more casual, everyday term for overtime pay, while 残業手当 is a formal term often used in official contexts like company regulations.
Compound of 残業 (overtime work) and 手当 (allowance, compensation).