How Much Does a Loan Cost? UK Borrowing Costs Explained

Most lenders advertise a monthly payment, not a price. That is where borrowers get caught out. A loan that costs £92 a month for 18 months sounds manageable until you add it up and realise you are handing over £1,658 to borrow £1,000. Before you apply for anything, work out the total amount repayable: the money you borrowed plus every penny of interest and any fees. That single number is what the borrowing actually costs, and it is the only fair way to compare one offer against another. Here is how to work it out before you commit.

What you are actually paying for

Every loan quote contains three numbers worth understanding. The APR is the yearly cost of the credit, expressed as a percentage so you can compare products on a like-for-like basis. Any fees are one-off charges, such as an arrangement fee, and a properly calculated APR includes them. The total amount repayable is the headline figure: what leaves your bank account across the whole term. A quick sanity check is the cost per £100 borrowed. Repay £1,658 on a £1,000 loan and you are paying roughly £66 in interest for every £100 you borrowed. Worth knowing before you sign, not three months later.

What a £1,000 loan actually costs

Here is our representative example, which is the rate at least 51% of successful applicants would receive. £1,000 borrowed over 18 months at a representative 89.5% APR (variable), repaid in 18 monthly payments of £92.12. The total amount repayable is £1,658.16, so the interest alone is £658.16, an annual interest rate of 65.67% (fixed). Now scale it. Borrow £500 over six months at a similar rate and the interest comes to roughly £100, so you repay about £600. Borrow £3,000 over 36 months and the total lands near £6,900, more than double what you borrowed. Longer terms feel gentler month to month and are usually the most expensive way to borrow. You can run your own figures through our free APR calculator before you apply anywhere.

Why two loans at the same APR cost different amounts

APR is a good starting point, but it is not the whole picture. Three things move the final figure. Term length is the biggest: stretching £1,000 from 12 months to 30 months can almost double the interest, even at an identical rate. Day-based charging matters on short-term loans, where the total is built from daily interest, so a few extra days on the term adds to the bill. And early settlement terms decide whether paying off early actually saves you money. Regulated agreements carry a statutory rebate of future interest, but the amount is worked out on a formula, not on what you hoped to save. Check it in the credit agreement itself.

How to compare offers properly

Line up three numbers for each offer: the monthly repayment, the number of payments, and the total amount repayable. The third number is the one that decides whether an offer is genuinely cheap. Then check the late payment fee, whether overpayments are allowed, and what happens if a payment bounces. A higher monthly payment over a shorter term usually beats a low payment spread over four years, as long as you can genuinely afford it every month. And borrow only what the problem needs. The cheapest loan is the smallest one that solves it.

An example: £700 for a boiler repair

Sarah's boiler failed in February and the quote was £700. The first offer she found was £700 over 12 months at £88 a month, which looked reasonable until she added it up: £1,056 in total. She checked her options through Mini Money instead. One soft search showed her several lenders' costs side by side, and she chose £700 over nine months at £87 a month, £783 in total. Fewer repayments, less interest, and only one full application recorded on her file.

How a broker shows you the real cost

Applying to lenders one at a time means seeing one price at a time, and leaving a hard search behind each time. A credit broker like Mini Money reverses that. You enter your details once, the broker runs a soft search across a panel of 30+ FCA-regulated lenders, and shows you the offers you are likely to be accepted for, with the monthly payment and total cost for each. You compare the real numbers before anything is committed. Nothing is agreed until you choose an offer and sign.

Before you sign anything

Read the agreement rather than the summary email. The total amount repayable, the APR, the number of payments and the early settlement terms should all be printed there in plain terms. If the monthly payment only works on your best month, it does not work. Lenders must check you can afford the repayments, so be straight about your income and outgoings during the affordability check. And if you are already behind on existing credit, get free debt advice from MoneyHelper or Citizens Advice before taking on more. Borrowing again to cover a shortfall usually makes the shortfall bigger.