What is an instalment loan?
An instalment loan is any loan you repay in a series of equal, scheduled payments, called instalments, over a set term. Most personal loans, including the ones on our panel, work this way. You borrow a fixed amount and repay it in equal monthly chunks until it is gone.
The defining feature is certainty. The amount, the term and the monthly payment are all agreed at the start and do not change, so there are no surprises along the way.
How instalment loans work
Each instalment is made up of two parts: some interest and some of the original amount you borrowed. Early on, more of each payment goes towards interest. As the balance falls, more goes towards clearing what you borrowed, until the loan reaches zero at the end of the term.
Whichever term you choose, every monthly instalment on that loan is the same, which is what makes an instalment loan easy to plan around.
Instalment loans versus revolving credit
Instalment credit is different from revolving credit like a credit card or overdraft. The difference changes how predictable your payments are:
A set amount repaid over a set term.
A credit limit you draw on and repay.
Revolving credit is flexible, which suits ongoing or uncertain spending. An instalment loan is predictable, which suits a one off cost you want to clear on a fixed schedule.
Why fixed payments help you budget
Because the payment never changes, an instalment loan is one of the easiest forms of credit to plan around. You can set the payment against your monthly income and know exactly when the loan will be cleared. There is no risk of the minimum payment creeping up as it can with revolving credit.
Paying by direct debit means you never miss an instalment by accident. On time payments protect your credit file, while missed ones can harm it, so automating the payment is a simple safeguard.
What instalment loans cost
The cost depends on the amount, the term and the rate you are offered. As with any loan, a longer term lowers the monthly instalment but increases the total interest. For loans that count as high cost short term credit, the Financial Conduct Authority caps the total cost:
Applying for an instalment loan
You can get a quote in about two minutes. We search our panel with a soft search, so you can compare what you could be offered without affecting your credit score.
Borrowing responsibly
The predictability of instalments makes it easier to borrow sensibly, but the basics still apply. Only borrow what you need, choose the shortest term you can comfortably afford, and check the total amount repayable before you agree.
If money is tight, free and impartial help is available from MoneyHelper.
Sources and methodology
Every figure in this guide is drawn from an official or independent authority, listed below. We do not link to other lenders or brokers. Where a statistic could change, we note when we last checked it, in July 2026.
Methodology: this guide is written and reviewed in house by Paul Gillooly, Director of Dot Dot Loans, using published rules from the Financial Conduct Authority and figures from the sources above. It is general information, not financial advice. Representative Example: £1,000 borrowed for 18 months. 17 monthly repayments at £87.22, final repayment of £87.70. Total amount repayable £1,570.44. Interest total £570.44. Annual interest rate 59.97% (fixed). Representative APR 79.5% (Variable). Any representative monthly repayment shown is for illustration only, based on our representative APR. Your actual repayments will be confirmed by the matching lender if your application is approved.