noun
deposit; money paid on account; bargain money
Refers to a partial payment made in advance to secure a transaction or as a down payment. The distinction between a general deposit and bargain money is slight; both are covered here.
契約時に内金として5万円を支払った。
I paid 50,000 yen as a deposit at the time of the contract.
内金を入れて予約を確定させてください。
Please put down a deposit to confirm the reservation.