Nominal vs. effective interest rate – what's the difference?
Published: 2026-09-05 · Updated: 2026-09-07 · Izračunaj.ba
The nominal interest rate is what the bank uses to accrue interest and compute your payment. The effective rate (APR/EKS) also includes every other loan cost — processing fees, mandatory insurance, account fees — so it shows the true annual price of borrowing. That's why it is always equal to or higher than the nominal rate, and why bank offers should be compared by the effective rate.
What the nominal rate covers
The nominal rate is the "pure" price of money: interest accrues on the outstanding debt at this rate each month, and the annuity payment follows from it. When you type a rate into a loan calculator, that's the nominal rate.
On its own it doesn't tell you what the loan really costs — two banks with the same nominal rate can have completely different total costs.
Loan calculatorMonthly payment, total interest and amortization.Open the calculator →What the effective rate adds
The effective rate folds in one-off and recurring costs tied to the loan: application processing fees, insurance premiums required as a loan condition, account maintenance fees, even a mandatory deposit. All of it is converted into one annual rate that's comparable across banks.
Banks in Bosnia are required by regulation to disclose the effective rate in offers and contracts — ask for it explicitly and don't sign before seeing it.
Example: two loans, same nominal rate — different price
Take an example (the fee levels are illustrative, not market claims): two offers for 20,000 KM over 60 months, both at a 6% nominal rate. The payment is identical in both — 386.66 KM — so loan A, with no fees at all, costs 23,199.36 KM in total, of which 3,199.36 KM is interest.
Loan B, with the same payment, charges a 2% processing fee (400.00 KM) and a 5 KM monthly account fee (300.00 KM over 60 months). Its true cost is 23,899.36 KM — exactly 700.00 KM more, even though on paper it has the very same nominal rate and the very same payment:
| Loan A (no fees) | Loan B (2% fee + 5 KM/month) | |
|---|---|---|
| Monthly payment | 386.66 KM | 386.66 KM |
| Total interest | 3,199.36 KM | 3,199.36 KM |
| Processing fee | — | 400.00 KM |
| Account fee (60 months) | — | 300.00 KM |
| Total paid | 23,199.36 KM | 23,899.36 KM |
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Contact us → marketing@izracunaj.baThat difference is exactly what the effective rate captures
Converted into an annual rate, loan B's fees push its effective rate to roughly 7.6%, while loan A sits at about 6.2% (above the nominal 6% only because interest compounds monthly). Same nominal rate, same payment — yet the rate that shows the true price differs by almost one and a half percentage points.
The lesson: use the payment for budgeting, the effective rate for choosing the bank.
What else to watch
Check whether the rate is fixed or variable (tied to EURIBOR) — a variable nominal rate means the payment can rise. When refinancing, the costs of closing the old loan belong in the comparison too. And always compare the total amount repaid — that's the number you actually pay.
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