Personal Loan Calculator UK 2025
Calculate monthly repayments and total interest on any UK personal loan, car finance or debt consolidation. See the full year-by-year amortisation schedule showing exactly how much of each payment goes to interest vs principal.
| Year | Annual Payment | Interest Paid | Principal Paid | Balance Remaining |
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APR vs interest rate — what’s the difference?
The APR (Annual Percentage Rate) is the true cost of borrowing — it includes the interest rate plus any mandatory fees, expressed as an annual percentage. Lenders are legally required to advertise the “representative APR” which at least 51% of accepted applicants must receive. Your actual APR may be higher depending on your credit score and the amount borrowed.
The nominal interest rate (without fees) will always be lower than or equal to the APR. When comparing loans, always compare APRs, not just headline interest rates.
£1,000–£2,999: 20–35% APR · £3,000–£4,999: 10–15% APR · £5,000–£9,999: 6–10% APR · £10,000–£25,000: 5–9% APR. Best-buy rates are typically available to applicants with excellent credit scores.
How to reduce the total cost of your loan
The two most effective ways to reduce total interest paid are: choosing a shorter loan term (monthly payment is higher but total interest is dramatically lower) and making overpayments when possible. Most UK personal loans allow early repayment, though some charge an early repayment fee of up to 58 days’ interest.
Improving your credit score before applying can also unlock a significantly better rate. A difference of 3–4 percentage points in APR on a £10,000 loan over 5 years can save over £1,000 in total interest.