Serbian statutory default interest calculator
Dinar or euro debts at historical NBS rates
- Calendar days
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- Debt plus interest
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A rough calculation, not legal advice.
Worked out in your browser. No sign-up.
Enter the amount owed in dinars or euros, the first day late and the last day to count. The calculator works out statutory default interest (zakonska zatezna kamata) as simple interest at the National Bank of Serbia's historical rates. Both dates are included. Special cases, such as a consumer's debt to a bank, aren't covered.
How it works
Interest for each day is the debt × the annual rate / 100 / the number of days in that year (365 or 366). The daily amounts are added up without adding interest to the debt, and the total is rounded only at the end. The first day late and the last day counted are both included, as Article 6 of the Default Interest Law (Zakon o zateznoj kamati) requires.
Rates from the National Bank of Serbia (NBS) are built in from 25 December 2012 to 13 November 2026, for both RSD and EUR. For dinar debts the rate is the NBS key policy rate plus eight percentage points. For euro debts it's the matching ECB rate plus eight points. On 13 November 2026 the general dinar rate stood at 14% a year.
Part payments, changes to the amount owed, interest on tax debts and the special rules protecting users of financial services aren't covered. In those cases, don't just reuse this rate.
Worked example
A Belgrade firm is owed RSD 100,000 on an invoice that was late from 1 to 31 January 2026. That's 31 days at 13.75%, giving RSD 1,167.81 in interest and RSD 101,167.81 in total.
For 13 November 2026 alone the new 14% rate applies, so one day's interest is RSD 38.36.
Questions people ask
Do I enter the date the invoice was due?
Enter the first day it was late. If the invoice was due on 10 January, the debt is normally late from 11 January. The last date you enter is counted too.
Does this work for a missed loan instalment?
Not automatically. A consumer's debt to a bank or other financial provider can fall under special rules. This calculator uses the general Default Interest Law.
Why can't I pick a date after 13 November 2026?
The rates have only been checked up to that day. The calculator doesn't assume the latest rate will stay the same; the NBS history has to be updated first.
Is interest charged on interest?
No. Interest that has built up is not added to the debt. If there were part payments or the amount owed changed, each period has to be worked out separately.
Is statutory interest the same for euros and dinars?
No. Dinar debts follow the NBS key policy rate plus 8 points, euro debts the ECB rate plus 8 points, so the two rates are very different.
Sources
- National Bank of Serbia (Narodna banka Srbije), current statutory default interest rates — checked 13.11.2026
- NBS, historical rate data (XLSX) — checked 13.11.2026
- Default Interest Law (Zakon o zateznoj kamati), Official Gazette 119/2012, Art. 3–8 — checked 13.11.2026
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Updated: 13 November 2026