PennyCompass

UK Personal Loan Calculator

Free UK personal loan calculator. Monthly repayment and total interest given APR and term.

Published

UK personal loan repayment.

Monthly repayment

Total interest

Total paid

Your breakdown

Updates live as you type
Item Amount

Worked example

Borrow £10,000 over five years at a representative 8.5 percent APR. The amortising formula gives a monthly repayment of about £205. Across the 60 payments you hand back roughly £12,310 in total, of which about £2,310 is interest and £10,000 is the original capital. Early payments are mostly interest because it is charged on the full balance, while later payments chip away more capital as the balance shrinks. A shorter three-year term would raise the monthly payment but cut the total interest sharply, the classic trade-off between affordability today and cost overall.

How it is calculated

The monthly repayment comes from the standard amortising loan formula, which spreads the capital and interest into equal payments across the term. The APR you enter is converted to a monthly rate by dividing by twelve, then the formula solves for the fixed payment that clears the balance over the chosen number of months. Total interest is simply the sum of all payments minus the amount you borrowed. Lenders advertise a representative APR, the rate offered to at least 51 percent of accepted applicants, so the rate you are actually quoted can be higher depending on your credit profile. The figure here also assumes no arrangement fee and a constant rate, so always check your personalised quote and the total amount payable before signing.

Frequently asked questions

Representative APR?
Lenders advertise the rate offered to at least 51 percent of successful applicants. Your actual rate may be higher based on credit score. Always check your personalised quote before committing.
Can I repay a personal loan early in the UK?
Yes. Most UK lenders allow early repayment, but many charge an early repayment fee of up to 58 days of interest under the Consumer Credit Act. Check your loan agreement for the exact figure before overpaying, as the saving in interest must outweigh the fee.
Does a personal loan affect my credit score?
Applying for a loan triggers a hard credit search, which can temporarily lower your score by a few points. Once you have the loan, making all repayments on time generally improves your score over time. Missing payments will damage your credit record and remain visible for six years.
What is the difference between APR and the interest rate?
The interest rate is simply the cost of borrowing the capital, expressed annually. The APR (Annual Percentage Rate) includes the interest rate plus any mandatory fees, so it gives a more complete picture of the true annual cost. UK lenders are required by the Financial Conduct Authority to display the APR so you can compare products fairly.

Related calculators

Sources

  1. HMRC — Income Tax Rates and Personal Allowances 2026/27, HM Revenue & Customs
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