noun
provisional payment; deposit paid in advance
A legal and financial term for a payment made provisionally, often before the final amount is determined, such as a deposit in a lawsuit or tax prepayment.
裁判所に仮納金を納める必要がある。
You need to pay a provisional deposit to the court.
税務署は仮納金の追加を求めた。
The tax office requested an additional provisional payment.
前払い is a general term for advance payment in commercial contexts, whereas 仮納金 is a technical term used in legal and tax procedures.
Compound of 仮 (provisional, temporary) + 納 (payment, supply) + 金 (money). The exact historical derivation is uncertain, but the term is used in modern legal and financial contexts.