Installment

An installment is one payment within a series of regular, usually equal, payments made over time to repay a loan, lease, or purchase in parts rather than settling the full amount at once. Installment credit, structured around a fixed number of scheduled installments, is one of the two broad categories of consumer credit, the other being revolving credit, where the amount owed fluctuates based on ongoing borrowing and repayment rather than following a predetermined schedule.

Most mortgages, auto loans, and personal loans are structured as installment credit, with each installment, typically paid monthly, covering a combination of principal repayment and accrued interest calculated according to the loan's amortization schedule.

Paying for something in installments means breaking a total cost into smaller, regularly scheduled pieces rather than paying it all in one go, whether that total cost is the price of a loan being repaid with interest, or simply the price of a purchase being spread over several payments through a retailer's own financing arrangement. Each installment represents a portion of the overall obligation, and the total of all installments across the full schedule should, in a properly structured loan, exactly pay off the debt by the agreed final date.

• A fixed number of scheduled payments, agreed at the outset, rather than an open-ended, revolving balance.
• A predetermined repayment schedule, typically monthly, that does not change based on how the borrower chooses to use the credit.
• A calculable total cost, since the number and amount of installments are known in advance, making it straightforward to determine the total interest that will be paid over the life of the loan.

Installment loans, such as mortgages and auto loans, are repaid through a fixed schedule ending on a known date, while revolving credit, such as credit cards, allows the borrower to repeatedly borrow, repay, and borrow again up to an approved limit, with no fixed end date to the overall credit relationship itself. This structural difference affects how each type of credit is reported on a credit report, how it factors into credit scoring models, and how predictable the total cost of borrowing is likely to be for the consumer.

Missing a scheduled installment payment is generally treated as a specific, dated default event rather than simply a growing balance, and can trigger late fees, negative credit reporting, and, if missed payments continue, more serious consequences such as repossession of secured collateral or formal default proceedings, depending on the type of installment credit involved and how far behind the borrower has fallen.

Beyond loans arranged through a bank, many retailers and online platforms now offer point-of-sale installment plans, often branded as "buy now, pay later," allowing a consumer to split the cost of a purchase into a small number of installments, sometimes interest-free, directly at checkout rather than through a separate loan application. While these short-term installment plans can be a useful budgeting tool when used deliberately, using several overlapping installment plans across multiple purchases at once can make it surprisingly difficult for a consumer to track their true total near-term payment obligations.

Consistently making installment payments on time is generally viewed favorably by credit scoring models, since a track record of successfully managing a fixed, predictable repayment schedule demonstrates a different kind of credit discipline than simply keeping a revolving balance low, which is one reason a healthy mix of installment and revolving credit is sometimes cited as beneficial to an overall credit profile, though taking on unnecessary installment debt purely to diversify credit type is rarely advisable on its own.

Lenders disclose the full installment schedule, typically in an amortization table, before a loan closes, giving borrowers a complete picture of how much of each future payment will go toward interest versus principal across the entire repayment period.

• Consumer Financial Protection Bureau