Reference · Bulgaria · 1 July – 31 December 2026
Bulgaria late payment interest rate
The statutory interest on an overdue B2B invoice in Bulgaria is 12.40% a year for 1 July – 31 December 2026: the ECB main refinancing rate of 2.40% plus a margin of 10 points.
Bulgaria's national transposition adds +10pp, not the +8pp minimum. Euro adoption 1 Jan 2026 aligns its base rate to the ECB (2.40% on 1 Jul). Reference component well-supported but not primary-source-confirmed to the decimal (BNB publishes the base rate behind a JS wall).
- Rate
- 12.40%
- Reference + margin
- 2.40% + 10pp
- Applies
- 1 July – 31 December 2026. Next reset 1 January 2027. Invoices in euro.
- Source
- calculator.bg · verified 9 July 2026
This figure is lower-confidence: confirm it against the official Bulgaria source before relying on it.
What 12.40% comes to on an unpaid invoice
Simple interest at 12.40% a year on a 365-day year, counted from the day after the payment date.
| Invoice | 30 days | 60 days | 90 days |
|---|---|---|---|
| €5,000 | €50.96 | €101.92 | €152.88 |
| €10,000 | €101.92 | €203.84 | €305.75 |
| €50,000 | €509.59 | €1,019.18 | €1,528.77 |
Work out the interest on your invoice
Prefilled with Bulgaria's statutory rate for 1 July – 31 December 2026. If your contract sets a higher rate, use that instead.
Interest you can claim
€203.84
€10,203.84 with the invoice · €3.40 a day
Alongside the rate
When interest starts, and the recovery fee
Interest runs from the day after the payment date in your contract. If the contract sets none, it runs from 30 days after your customer receives the invoice. Agreed payment terms longer than 60 days are only valid if they were expressly agreed and aren't grossly unfair to you.
On top of the interest, you are owed a fixed sum of at least €40 per late invoice for recovery costs. It is due automatically, with no reminder needed, and you can claim reasonable recovery costs above it, such as a collection agency's fees.
These are the rules of Directive 2011/7/EU, which every member state applies. National law can be stricter, so check Bulgaria's own rules before relying on them.
How Bulgaria compares
Like most of the euro area, Bulgaria builds its rate on the ECB's 2.40%. It adds 10 points, above the Directive's minimum of 8.
Of the other 26 EU countries, 3 set a higher statutory rate and 22 a lower one. The range runs from 10.00% (Denmark and Sweden) to 14.50% (Romania).
Same 12.40% rate: France.
Charging interest is the easy part. Collecting is the work.
DueTrail turns overdue invoices into managed cases with reviewable reminders and promise-to-pay tracking, so your team follows up the same way in Bulgaria as everywhere else you sell.