She deposits 10,000 yen in the bank every month.

Literal

She [topic-は] every-month 10,000 yen [object-を] bank [to-に] is-depositing.

1万円を銀行に預金している — 預金する (よきんする, 'to deposit money') is a financial suru-verb. 毎月 (まいつき, 'every month') sets the frequency. ている marks a habitual ongoing action.