If you have ever compared loans based on the advertised “great deal,” you were almost certainly looking at the nominal interest rate. Banks like to highlight it because it is simple. The problem is that the interest rate does not include all costs. That means two offers with seemingly similar interest rates can end up meaning very different total payments.

In short:

  • APR is the most useful metric because it includes interest and part of the costs.
  • Banks often emphasize the interest rate because costs (approval, account management, insurance) are buried in the fine print.
  • In practice: check the APR in the written offer and compare it with the APR calculator.

What APR is (and what it tries to capture)

APR stands for Annual Percentage Rate. The purpose of APR is to let you compare offers more fairly for the same loan amount and the same term than you could using only the interest rate, because APR usually includes:

  • interest,
  • part of the approval costs,
  • part of the account management costs,
  • costs that are a condition for getting the loan (where they are included in the APR calculation).

Why banks often talk about the interest rate, not APR

The reasons are fairly practical:

  • The interest rate is easier to understand and easier to advertise as a single number.
  • APR depends on assumptions (amount, term, costs, package, customer status…).
  • Some costs can appear as a “condition” (for example a package), so the user does not get the feeling that this is a loan cost.

Proof that the differences are not small: the APR table (Bank of Slovenia)

So this does not stay purely theoretical, take a look at our article What Is APR and Why Is It More Important Than the Nominal Interest Rate?, which includes an APR table from the Bank of Slovenia (a comparison of consumer loans under uniform assumptions). Comparisons like this show clearly that the differences between banks are not trivial.

Why does this matter?

When you are looking for a mortgage, the absolute differences in costs (and therefore in the total amount you pay) can quickly add up to thousands of euros, because the amount is larger and the term is longer.

How to use APR in practice (without overcomplicating it)

  • Always ask for a written offer that states the APR.
  • Compare offers under the same assumptions (amount, term, repayment method).
  • Ask for the approval cost and account management cost (in €).
  • If a package/insurance is required, ask whether it is a condition and how much it costs.
  • For a quick simulation, use the APR calculator and the loan calculator.