down payment; deposit
家を買うために頭金を貯めた。
I saved up for a down payment to buy a house.
頭金が足りなくてローンが組めなかった。
I didn't have enough for a down payment, so I couldn't get a loan.
車の購入で頭金を百万円用意した。
I put aside a million yen as a down payment for the car.