noun
reserve fund; savings; deposit
Money set aside or accumulated, often in a systematic way. Can refer to a dedicated reserve fund, regular savings, or a deposit made into an account.
毎月の積み金で旅行に行く。
I go on a trip using my monthly savings.
会社は設備更新のために積み金を設けている。
The company has set up a reserve fund for equipment renewal.
Compound of 積み (tsumi, 'accumulating') + 金 (kin, 'money').