Representative APR Calculator

A representative APR calculator estimates the yearly cost of credit when an arrangement fee is included. Enter the amount, stated rate, fee and term to compare the note rate with the estimated APR and the effective compounded rate.

By the InstalmentLoans Editorial Team · Last updated 2 October 2026

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Enter your numbers and press Calculate. Nothing you type leaves your browser.

How this calculator works

The APR is the yearly cost of credit when fees are included. It is often higher than the advertised rate because a fee reduces the money you actually receive while the repayments stay the same.

This calculator finds the monthly periodic rate i that solves:

Amount - fee = M * (1 - (1 + i)^-n) / i

It reports the nominal APR = i * 12 * 100 and the effective APR = ((1 + i)^12 - 1) * 100. If the fee is zero, both equal the stated rate.

Fees vary by lender, so enter the fee from your own offer. A lender's advertised representative APR is the rate at least 51% of successful applicants receive.

Frequently asked questions

What is the difference between the APR and the interest rate?
The interest rate is the cost of borrowing the capital. The APR also includes upfront fees, so it reflects the total yearly cost of credit.
Which APR does this calculator report?
It reports the nominal APR, which is the monthly periodic rate times 12, and the effective APR, which compounds that rate over 12 months.
Why is my APR higher than my stated rate?
A fee reduces the net amount you receive while your repayments stay the same. To break even, the effective cost of the money you actually received must be higher.
What counts as a fee here?
Enter an upfront arrangement or admin fee that the lender charges to set up the loan. Do not include late payment charges, because those depend on your behaviour.

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