accumulated deficit; cumulative loss
Used in financial and accounting contexts for a deficit that builds up over time, often referring to a company's or government's accumulated losses.
This company's accumulated deficit exceeds one billion yen.
赤字 means a deficit or loss in a single period, while 累積赤字 refers to the total accumulated deficit over multiple periods.
Compound of 累積 (るいせき, 'accumulation') and 赤字 (あかじ, 'deficit').