A hire purchase (HP), also known as an installment plan, is an arrangement whereby a customer agrees to a contract to acquire an asset by paying an initial installment (e.g., 40% of the total) and repaying the balance of the price of the asset plus interest over a period of time. Other analogous practices are described as closed-end leasing or rent to own.

In other words installment means to let a thing without giving total price while payment will be given in a given time period. The buyer will pay monthly agreement installment.

The hire purchase agreement was developed in the United Kingdom in the 19th century to allow customers with a cash shortage to make an expensive purchase they otherwise would have to delay or forgo. For example, in cases where a buyer cannot afford to pay the asked price for an item of property as a lump sum but can afford to pay a percentage as a deposit, a hire-purchase contract allows the buyer to hire the goods for a monthly rent. When a sum equal to the original full price plus interest has been paid in equal installments, the buyer may then exercise an option to buy the goods at a predetermined price (usually a nominal sum) or return the goods to the owner.

If the buyer defaults in paying the installments, the owner may repossess the goods, a vendor protection not available with unsecured-consumer-credit systems. HP is frequently advantageous to consumers because it spreads the cost of expensive items over an extended time period. Business consumers may find the different balance sheet and taxation treatment of hire-purchased goods beneficial to their taxable income. The need for HP is reduced when consumers have collateral or other forms of credit readily available, such as credit cards.

These contracts are most commonly used for items such as automobiles and high-value electrical goods where the purchasers are unable to pay for the goods directly.