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Free calculatorTax year 2026/27
APR calculator
Estimate the effective Annual Percentage Rate on a loan with fixed monthly repayments.
The calculator
Estimate only. This calculator provides an estimate only and should not be relied on as advice.
What is APR?
The Annual Percentage Rate (APR) expresses the total yearly cost of borrowing — including interest and certain fees — as a single percentage, so you can compare loans on a like-for-like basis. This calculator estimates the effective APR from the loan amount and the fixed monthly repayment.
APR is useful because two loans with the same headline interest rate can cost very different amounts once fees and the repayment schedule are taken into account.
Frequently asked
Is APR the same as the interest rate?+
Not quite — APR includes the interest plus certain compulsory fees, so it usually sits above the headline interest rate and gives a truer cost of borrowing.