early overtime; overtime before work starting time
Refers to overtime worked by arriving early, before the official start of the workday. Often used in contexts of unpaid or unrecognized overtime.
Many workplaces have normalized early overtime.
He does an hour of early overtime every morning.
残業 is general overtime (staying late), while 早出残業 specifically means overtime by coming in early.
早出 means 'early arrival' or 'early shift' but does not necessarily imply overtime; 早出残業 explicitly frames it as overtime.
Compound of 早出 (early arrival) and 残業 (overtime).