How to Collect Debts in Bulgaria After Euro Adoption: a Practical Guide for Creditors

Bulgaria officially adopted the euro on 1 January 2026, replacing the Bulgarian lev (BGN) and creating immediate operational consequences for every creditor holding outstanding claims in the country. For CFOs, credit managers and SME owners pursuing debt collection in Bulgaria, the transition demands three urgent actions: converting all BGN-denominated claims to EUR at the irrevocable fixed rate of 1 EUR = 1. 95583 BGN established by the Bulgarian National Bank, recalculating accrued and future interest under the updated statutory framework, and ensuring that enforcement filings comply with procedural amendments introduced alongside the currency switch.

This guide provides a step-by-step playbook, complete with worked examples, enforcement timelines, cost estimates and practical checklists, to help creditors navigate the post-euro debt-recovery landscape in Bulgaria with confidence.

Executive Summary and Immediate Actions for Debt Collection in Bulgaria

The euro adoption does not extinguish or alter the substance of any debt. What it does change is the denomination, the interest reference framework, and certain procedural formalities. Creditors should act on the following priorities without delay:

• Convert all outstanding BGN amounts to EUR. Apply the irrevocable fixed rate of 1 EUR = 1.95583 BGN. Round to the nearest cent using standard mathematical rounding (five or above rounds up). This applies to invoices, contracts, court judgments and enforcement writs.
• Recalculate interest. Interest accrued before 1 January 2026 must be calculated in BGN and then converted. Interest accruing from 1 January 2026 onward is calculated directly in EUR, using updated statutory or contractual rates.
• Preserve enforcement deadlines. The statute of limitations continues to run regardless of the currency change. Verify all limitation periods and file enforcement actions promptly where deadlines approach.
• Update all documentation. Demand letters, invoices and court filings should reflect EUR amounts. Dual-denomination references (BGN and EUR) are recommended during the transitional period for clarity.

Creditors should also assemble and verify the following documents: the original contract or purchase order, all unpaid invoices, proof of delivery or performance, correspondence with the debtor, and any prior court orders or judgments. These form the foundation of an effective enforcement file in Bulgaria.

What Changed on 1 January 2026: Euro Adoption and Legislative Context

Bulgaria’s path to the euro culminated in a multi-year legislative and institutional preparation overseen by the Bulgarian National Bank (BNB) and the Ministry of Finance. Understanding the key legal instruments is essential for creditors because several concurrent legislative changes affect how debts are pursued and enforced.

Key Dates and Legal Instruments

The legislative framework for euro adoption was enacted through the Law on the Introduction of the Euro in the Republic of Bulgaria, published in the State Gazette (Държавен вестник). This law established the irrevocable fixed conversion rate, set the dual-circulation period, and mandated that all monetary obligations denominated in BGN be automatically re-denominated in EUR from 1 January 2026. Alongside this, amendments to the Commerce Act introduced updated requirements for commercial debt notices and adjusted certain fee structures relevant to enforcement proceedings. Consumer-protection updates, including provisions related to collective redress in Bulgaria, strengthened debtor protections for consumer-facing claims.

What Creditors Must Note Immediately

Industry observers expect that courts will continue to accept transitional filings referencing both BGN and EUR amounts during the initial months, but creditors should adopt EUR-only documentation as quickly as possible to avoid delays.

Currency Conversion: Rules, Authorised Rates and Sources

Correctly converting BGN amounts to EUR is the single most important mechanical step for debt collection in Bulgaria following euro adoption. Errors in conversion or rounding can result in rejected court filings, disputed interest calculations and delayed enforcement.

Official Rate Sources, Which to Use and Why

The Law on the Introduction of the Euro mandates use of the irrevocable fixed rate of 1 EUR = 1.95583 BGN for all conversions. This rate, confirmed by the Bulgarian National Bank and the European Central Bank, cannot be inverted (creditors must divide the BGN amount by 1.95583 to arrive at EUR, not multiply by a rounded inverse). Rounding applies only to the final EUR amount, rounded to the nearest cent.

Worked Example 1, Converting an Invoice

A Bulgarian supplier issued an unpaid invoice for BGN 50,000 on 15 November 2025. The creditor must convert the claim to EUR for any post-1 January 2026 enforcement filing.

1. Step 1: Take the outstanding principal, BGN 50,000.
2. Step 2: Divide by the irrevocable fixed rate, 50,000 ÷ 1.95583 = 25,564.59372…
3. Step 3: Round to the nearest cent, EUR 25,564.59.

This converted amount replaces the BGN figure in all court documents, demand letters and enforcement applications filed after 1 January 2026.

Worked Example 2, Converting a Court Judgment and Enforcement Costs

A creditor obtained a Bulgarian court judgment for BGN 120,000 principal plus BGN 4,800 in court fees, entered in September 2025. The creditor now applies for an enforcement writ in February 2026.

1. Principal: 120,000 ÷ 1.95583 = EUR 61,355.02.
2. Court fees: 4,800 ÷ 1.95583 = EUR 2,454.20.
3. Total claim on enforcement writ: EUR 61,355.02 + EUR 2,454.20 = EUR 63,809.22 (before accrued interest).

The enforcement writ application should state both the original BGN amounts and the converted EUR figures, referencing the fixed rate and the relevant legal provision.

Interest Calculation and Late-Payment Interest After Euro Adoption

Interest recalculation is where many creditors encounter difficulty after a currency transition. The fundamental principle is straightforward: interest accrued before 1 January 2026 is calculated in BGN and then converted, while interest accruing from 1 January 2026 onward is calculated directly in EUR.

Formula and Step-by-Step Recalculation

Bulgaria’s statutory default interest rate for commercial claims has historically been the BNB base rate plus a statutory spread (typically 10 percentage points for commercial obligations under the Obligations and Contracts Act). Following euro adoption, the reference rate shifts to an ECB-linked benchmark. The formula for interest calculation in Bulgaria is:

Interest = Principal × (Annual Rate / 365) × Number of Days

For claims spanning the conversion date, creditors must split the calculation into two periods:

• Period 1 (pre-1 January 2026): Calculate in BGN using the BNB base rate + statutory spread. Convert the result to EUR at the fixed rate.
• Period 2 (from 1 January 2026): Calculate directly in EUR using the applicable post-adoption reference rate + statutory spread.

Worked Example, Commercial Contractual Interest

A creditor is owed BGN 50,000 from 1 October 2025. The contractual interest rate is 12% per annum. The creditor files a claim on 1 March 2026.

1. Period 1 (1 Oct 2025 – 31 Dec 2025, 92 days): BGN 50,000 × (0.12 / 365) × 92 = BGN 1,512.33. Converted: 1,512.33 ÷ 1.95583 = EUR 773.27.
2. Period 2 (1 Jan 2026 – 1 Mar 2026, 60 days): EUR 25,564.59 (converted principal) × (0.12 / 365) × 60 = EUR 504.44.
3. Total interest claimed: EUR 773.27 + EUR 504.44 = EUR 1,277.71.

Statutory Default Interest for Consumer Claims

For consumer debts where no contractual interest rate applies, the statutory default rate governs. Creditors pursuing consumer claims should verify the current statutory rate as published by the BNB (or its ECB-linked successor) and apply collective-redress considerations where multiple consumers are affected. The calculation follows the same split-period methodology, substituting the statutory rate for the contractual rate.

Rounding rules are critical: intermediate calculations should be carried to at least four decimal places, with rounding applied only to the final EUR figure. Courts have rejected interest claims where premature rounding inflated the total amount.

Pre-Litigation Recovery: Demand Letters, Statutory Notices and Practical Checklist

Before filing a court claim, creditors should exhaust pre-litigation recovery steps. These steps are not merely good practice, the Bulgarian Commerce Act amendments introduced formal notice requirements that, if not satisfied, can weaken a creditor’s position in court.

Creditor Checklist

• Original signed contract or purchase order (with payment terms)
• All unpaid invoices (converted to EUR with the fixed rate noted)
• Proof of delivery, performance or service completion
• Prior correspondence with the debtor (letters, emails, acknowledgements)
• Interest calculation worksheet (showing split-period method)
• Company registration extract of the debtor (available from the Bulgarian Commercial Register)
• Any prior court orders, judgments or enforcement writs

Sample Demand Letter, Key Elements

A compliant demand letter under the updated Commerce Act framework should include: the creditor’s full legal details, the debtor’s registered address, a clear statement of the debt in EUR (with the original BGN amount and conversion reference), the interest calculation method, a deadline for voluntary payment (typically 14 days), and a statement that judicial proceedings will follow non-payment. The letter should be sent via registered post with return receipt and, where possible, by email with delivery confirmation.

Costs to Expect

Pre-litigation costs are relatively modest: registered post and courier fees, commercial register extracts (typically under EUR 10 per extract), and legal fees for drafting the demand letter. Early engagement of local counsel is recommended because improperly drafted demand letters can undermine subsequent enforcement efforts.

Judicial Enforcement Procedure in Bulgaria: Step-by-Step

When pre-litigation recovery fails, creditors must turn to the Bulgarian courts. The enforcement procedure in Bulgaria follows a structured sequence governed by the Civil Procedure Code (Граждански процесуален кодекс, GPC). Understanding the enforcement procedure in Bulgaria is essential because procedural errors cause significant delays.

Fast-Track and Simplified Claims

Bulgaria offers an accelerated procedure for undisputed monetary claims under Article 410 of the GPC. The creditor files an application for an order for payment (заповед за изпълнение), which the court can issue without a full hearing if the claim is for a liquidated sum supported by documentary evidence. If the debtor does not object within two weeks, the order becomes enforceable.

For claims supported by especially strong documentary evidence, such as notarised documents, bills of exchange, or excerpts from commercial books, Article 417 of the GPC permits the court to issue an order for immediate enforcement. This fast-track route can compress the pre-enforcement phase to as little as two to four weeks.

Using an Enforcement Agent (Bailiff)

Once a creditor holds an enforceable title (a court judgment with an enforcement clause or an order for payment that has become final), the next step is to engage a private or state enforcement agent (частен съдебен изпълнител, private bailiff, or държавен съдебен изпълнител, state bailiff). The enforcement agent is authorised to:

• Serve the enforcement notice on the debtor
• Garnish bank accounts and receivables
• Seize movable property
• Impose a lien on and sell immovable property
• Attach the debtor’s salary or income

Private bailiffs generally offer faster service and more proactive asset investigation. Their fees are regulated by a tariff set by the Ministry of Justice, re-denominated in EUR following euro adoption.

Appeals and Objections, Practical Notes

Debtors can object to an order for payment, which converts the fast-track procedure into ordinary civil proceedings. In contested cases, first-instance proceedings typically last three to six months; appeals to the appellate court add a further three to six months. Creditors should factor these timelines into cash-flow projections and consider whether interim measures (such as attachment orders) are appropriate to prevent asset dissipation.

Early indications suggest that the re-denominated fee schedules have not materially increased enforcement costs, though creditors should verify the current bailiff tariff at the time of filing.

Cross-Border Claims and Foreign Creditors: Service, Recognition and Enforcement

Foreign creditors with claims against Bulgarian debtors face additional procedural layers, but Bulgaria’s EU membership provides significant advantages for cross-border debt recovery. The key considerations differ depending on whether the creditor’s judgment originates from an EU or non-EU jurisdiction.

Recognition of EU Judgments

Judgments from other EU Member States benefit from the Brussels Ia Regulation (Regulation (EU) No 1215/2012), which provides for direct recognition and enforcement without a separate exequatur proceeding. The creditor presents the judgment, the certificate issued under Article 53 of the Regulation, and a certified translation to the competent Bulgarian court. The European Enforcement Order for uncontested claims and the European Payment Order procedure offer further streamlined routes.

Recognition of Non-EU Judgments

For judgments from non-EU countries, the creditor must apply to the Sofia City Court for recognition under the Bulgarian Private International Law Code. The court will assess reciprocity, proper service on the debtor, and compliance with Bulgarian public policy. Bilateral treaties between Bulgaria and certain non-EU states may simplify this process. The recognition proceeding typically takes three to six months.

Practical Tips for Foreign Creditors

• Engage local counsel early. Bulgarian procedural rules have specific formalities that foreign lawyers may not anticipate. A qualified debt collection lawyer in Bulgaria (filter by country: Bulgaria; practice area: Debt Collection) can streamline the process significantly.
• Prepare certified translations. All foreign-language documents submitted to Bulgarian courts must be accompanied by a certified Bulgarian translation by a sworn translator.
• Use correct service channels. Service of process on Bulgarian debtors from abroad must comply with the Hague Service Convention or, for EU creditors, the EU Service Regulation (Regulation (EU) 2020/1784).
• Convert amounts to EUR before filing. Foreign creditors should convert their claim to EUR (if not already denominated in EUR) and clearly state the conversion method in their filings.

Consumer Claims, Collective Redress and Special Rules

Creditors pursuing debts owed by consumers in Bulgaria must navigate an enhanced protective framework. Bulgaria’s transposition of the EU Representative Actions Directive, together with domestic consumer-protection amendments that took effect alongside the euro adoption, has strengthened collective redress in Bulgaria and imposed additional procedural requirements on creditors.

Key considerations include:

• Pre-action notice requirements. Creditors must provide consumers with a formal payment notice that complies with the Consumer Protection Act, including a clear statement of the debt in EUR and information on the consumer’s right to dispute the claim.
• Limitations on enforcement measures. Certain assets and income thresholds are exempt from seizure when the debtor is a natural person (consumer). Creditors must verify current exemption limits, which have been re-denominated in EUR.
• Collective-redress risk. Consumer representative organisations can now bring collective actions against creditors engaging in unfair collection practices. Creditors should ensure that all communications and enforcement steps comply with fair-practice standards to mitigate this risk.
• Statute of limitations. The general limitation period for consumer claims remains three years for periodic payments and five years for most other obligations. These periods were not altered by euro adoption but must be monitored carefully.

Practical Creditor Checklist and Downloadable Resources

The following checklist consolidates the key actions a creditor should take when pursuing debt collection in Bulgaria after euro adoption:

1. Convert all BGN amounts to EUR using the fixed rate of 1 EUR = 1.95583 BGN.
2. Recalculate interest using the split-period method (BGN before, EUR after 1 January 2026).
3. Verify the debtor’s current registered address and status via the Bulgarian Commercial Register.
4. Draft and send a compliant demand letter in EUR (retain proof of delivery).
5. Assemble the full enforcement file: contract, invoices, delivery proof, interest worksheet, and debtor information.
6. Determine the appropriate court procedure: order for payment (Article 410 GPC) or ordinary proceedings.
7. Engage a local enforcement agent (private bailiff) upon obtaining an enforceable title.
8. Monitor limitation periods and appeal deadlines throughout.

Downloadable resources, including bilingual demand letter templates (BG/EN), a BGN-to-EUR conversion spreadsheet with interest calculator, a sample court claim template, and a full enforcement document checklist, are available to support creditors in preparing their files.

Worked Examples and Mini Case Studies

Case Study 1, Domestic B2B Debt Recovery

A Sofia-based manufacturer was owed BGN 80,000 by a distributor under a 2024 supply contract. In January 2026, the manufacturer converted the claim (EUR 40,913.05), calculated split-period contractual interest (EUR 2,180.40), and sent a demand letter in EUR. The distributor failed to respond within 14 days. The manufacturer filed an Article 410 application; the court issued an order for payment within three weeks. No objection was filed. Total enforcement time from demand letter to payment: approximately ten weeks.

Case Study 2, Foreign Creditor Enforcing an EU Judgment

A German supplier held a EUR 65,000 judgment from a Munich court against a Bulgarian buyer. The supplier’s Bulgarian counsel filed for direct enforcement under the Brussels Ia Regulation, presenting the Article 53 certificate and certified Bulgarian translation. The Sofia District Court confirmed enforceability within four weeks. A private bailiff garnished the debtor’s bank accounts and recovered the full amount within three months of the initial filing.

Conclusion and Next Steps

Debt collection in Bulgaria after euro adoption requires prompt action on three fronts: currency conversion, interest recalculation, and compliance with updated procedural requirements. The irrevocable fixed rate of 1 EUR = 1.95583 BGN governs all conversions, and creditors should adopt EUR-only documentation as standard practice. Early engagement of local counsel, meticulous record-keeping and adherence to the Bulgarian Commerce Act amendments will position creditors for efficient enforcement. For creditors seeking to act immediately, the practical checklists, worked examples and downloadable templates provided in this guide offer a solid operational foundation for protecting and recovering outstanding claims in Bulgaria.

Sources

1. Bulgarian National Bank (BNB), Official Rates and Euro Introduction Guidance
2. Government of the Republic of Bulgaria, Euro Introduction and Official Announcements
3. State Gazette (Държавен вестник), Bulgarian Legislation Portal
4. Ministry of Justice, Republic of Bulgaria
5. Association for Debt Management (RMA), Sector Guidance
6. CMS Law, Bulgaria
7. PwC Bulgaria, Financial and Conversion Practical Notes
8. European Commission, Euro Adoption Legal Framework
9. Bulgarian Ministry of Finance
10. BI Law Firm, Debt Recovery in Bulgaria