Statute of Limitations for Debt Claims in Bulgaria (2026): How Creditors Preserve and Restart Limitation Periods After the Euro Switch

Understanding the statute of limitations in Bulgaria is now more critical than at any point in the past decade. Bulgaria adopted the euro on 1 January 2026, triggering a wave of practical questions for creditors holding outstanding claims denominated in the former Bulgarian lev (BGN): do existing limitation periods still apply, how must amounts be converted, and what procedural steps can preserve or restart an expiring claim? This guide provides a comprehensive, creditor-focused roadmap covering every limitation period codified in the Obligations and Contracts Act (OCA), the mechanics of interruption and suspension, worked euro-conversion examples using the irrevocably fixed rate of 1 EUR = 1.

95583 BGN, and step-by-step checklists designed to help banks, lenders, in-house counsel and small business owners protect their rights.

Executive Summary: What Creditors Must Know Right Now

If you hold or manage receivables from Bulgarian debtors, four developments demand immediate attention:

• Canonical limitation periods remain unchanged. The general prescription period for debts is five years (Article 110, OCA); shortened three-year periods apply to specific claim types (Article 111, OCA); and an absolute ten-year limitation caps most claims by natural-person debtors (Article 112, OCA).
• Bulgaria’s euro adoption does not alter limitation periods or start dates. The changeover affects the denomination of amounts outstanding but not the duration of prescription. All outstanding BGN obligations converted automatically to EUR at the fixed rate of 1 EUR = 1.95583 BGN on 1 January 2026.
• Creditors must act promptly to interrupt or preserve claims. Valid interrupting acts, such as filing suit, serving a formal demand, or obtaining a written acknowledgement, restart the clock entirely. If your claim is within 180 days of expiry, preservation steps should begin immediately.
• Cross-border enforcement tools are available. Where a debtor has relocated to another EU member state, creditors can use the European Account Preservation Order (EAPO) and the EU Service Regulation to preserve claims and attach assets before judgment.

Industry observers expect that the first twelve months of euro-area membership will produce a spike in limitation-related disputes as courts work through conversion arithmetic and backdated interruption arguments. Early professional advice is essential.

Limitation Periods in Bulgaria at a Glance

The prescription period for debts in Bulgaria is governed primarily by Articles 110, 111 and 112 of the Obligations and Contracts Act (OCA), as published in the State Gazette. The table below summarises the key periods that every creditor should know.

Key note on the absolute limitation: The ten-year absolute limit introduced by the 2020 OCA amendments means that even if a creditor has validly interrupted the limitation period multiple times, the claim against a natural-person debtor is extinguished once ten years have passed from its initial accrual date. This provision was the subject of Constitutional Court review in 2021, and creditors should verify whether their specific claim falls within any carve-outs recognised by the court.

When Does the Statute of Limitations in Bulgaria Start?

Start-Date Rules: Accrual and Knowledge

Under Bulgarian law, the limitation period begins to run from the date the claim becomes due and enforceable (izisku​emost). For most commercial debts, this is straightforward: the clock starts when a payment obligation matures and the debtor fails to pay on time.

Specific rules apply in common creditor scenarios:

• Invoice-based claims: Limitation runs from the day after the payment deadline stated on the invoice. If no deadline is stated, it runs from the date the invoice is issued and received.
• Instalment obligations: Each instalment triggers its own limitation period. A missed instalment on 1 June 2023 starts a separate five-year clock expiring on 1 June 2028, even if subsequent instalments have not yet fallen due.
• Deferred or rescheduled obligations: If the parties agree to defer payment to a new date, the limitation period restarts from the new due date.
• Tort / damages claims: The three-year period runs from the date the injured party discovered, or ought reasonably to have discovered, the damage and the identity of the tortfeasor.

Correctly identifying the start date is the single most important step in any debt prescription analysis in Bulgaria, because every subsequent calculation, including interruption and euro-conversion, flows from it.

Suspension vs Interruption: Definitions and Practical Effects

Bulgarian law distinguishes between suspension (спиране) and interruption (прекъсване) of limitation periods. The difference matters enormously for creditors: suspension merely pauses the clock, while interruption resets it to zero.

Suspension of the Limitation Period

The limitation period is suspended, meaning time stops running but the already-accrued period is preserved, in specific circumstances defined by the OCA:

• Minority or legal incapacity: Time does not run against a claim where the creditor or debtor is a minor or is placed under judicial guardianship, for the duration of that status.
• Spousal relationship: Limitation is suspended between spouses for the duration of the marriage.
• Military service in wartime: Time is suspended for claims held by or against persons on active military service during hostilities.
• Pending judicial proceedings: Where proceedings have been commenced, some courts treat the period as suspended until a final judgment is rendered.

Suspension does not restart the clock. When the suspending circumstance ends, the remaining portion of the limitation period continues to run from where it paused.

Interruption of the Limitation Period

Interrupting the limitation period restarts the entire prescription clock from zero. Under Bulgarian practice, the following acts are recognised as valid interrupting events:

• Written acknowledgement by the debtor, any written statement or conduct from which an acknowledgement of the debt can be inferred (partial payment, signed payment plan, email confirmation).
• Filing suit or commencing enforcement proceedings, initiating a court action or an enforcement case against the debtor.
• Formal written demand served on the debtor, a creditor’s demand letter that meets evidentiary requirements (dated, addressed, specifying the claim, and provably delivered).

Worked example, interruption date math: Assume an invoice of BGN 50,000 became due on 10 April 2021 (five-year limitation expiring 10 April 2026). The creditor serves a valid formal demand on 15 March 2025. The limitation period is interrupted and restarts from 15 March 2025, giving the creditor until 15 March 2030 to file suit, well past the original expiry date. This is the core mechanism creditors use to preserve debt claims in Bulgaria.

Procedural Steps Creditors Should Take to Preserve Claims

Knowing the law is only half the task. Creditors need a structured workflow to ensure that no claim is lost to prescription. The following phased approach covers the most important creditor steps for suspending or interrupting the limitation period in Bulgaria.

Day 0–30: Immediate Preservation Checklist

• Gather and secure all original contracts, invoices, delivery confirmations, correspondence and bank statements evidencing the debt.
• Confirm the exact due date for each outstanding obligation and calculate the remaining limitation period.
• Identify the debtor’s current address, registered office, bank accounts and known assets, this information is critical for both domestic and cross-border enforcement.
• Send a preliminary payment reminder by email and registered post, documenting the date and content of each communication.

Day 30–90: Formal Demand and Provisional Measures

• Prepare and serve a formal demand letter that explicitly identifies the claim (amount, legal basis, due date) and demands payment within a specified period (typically 7–14 days). Service should be by notarised notice or registered mail with return receipt to create an unambiguous interruption event.
• If the debtor’s assets appear at risk of dissipation, apply for provisional measures (запор / възбрана), attachment of bank accounts or real property, through the competent Bulgarian court.
• Where the debtor has assets in another EU member state, consider an application for a European Account Preservation Order (EAPO) under Regulation (EU) No. 655/2014.

Filing Suit and Service: Domestic vs Cross-Border

• Domestic debtor: File a claim with the competent regional or district court. Under Bulgarian procedural law, the limitation period is interrupted on the date the statement of claim is filed with the court, not on the date it is served on the debtor.
• Cross-border debtor: If the debtor has moved to another EU member state, service must comply with the EU Service Regulation (Regulation (EU) 2020/1784). Consider filing in Bulgaria where jurisdiction is established under Brussels I bis and serving abroad.

Euro Adoption (1 January 2026): Conversion, Rounding and Limitation-Date Consequences

Bulgaria officially joined the euro area on 1 January 2026, with the euro becoming the sole legal tender from 1 February 2026 after a one-month dual-circulation period. Every creditor holding BGN-denominated claims needs to understand how the euro adoption affects limitation calculations and amounts due.

Legal Framework for Conversion and Rounding

The irrevocably fixed conversion rate is 1 EUR = 1.95583 BGN, as confirmed by the Bulgarian National Bank and the European Central Bank. Under the national law on the introduction of the euro and EU rules governing changeover, the following principles apply:

• Automatic conversion: All outstanding monetary obligations denominated in BGN converted automatically to EUR on 1 January 2026 at the fixed rate. No party action was required.
• Rounding: Converted amounts must be rounded to the nearest euro cent (two decimal places). The standard mathematical rounding rule applies: amounts of 0.005 EUR or above are rounded up.
• No alteration of terms: The conversion does not change the due date, limitation period, interest rate or any other contractual term. It affects only the denomination of the outstanding sum.
• Dual display: During the transitional period, amounts in court documents, demand letters and invoices should ideally show both the original BGN value and the EUR equivalent to avoid confusion.

Worked Euro-Conversion Examples for Limitation Calculation

Example A, Outstanding invoice, limitation running:

A creditor holds an unpaid invoice for BGN 97,791.50, due on 15 March 2024. The five-year limitation period runs until 15 March 2029. On 1 January 2026, the outstanding amount converts automatically:

BGN 97,791.50 ÷ 1.95583 = EUR 50,000.00

The limitation expiry date remains 15 March 2029. The creditor now files any court pleading or demand letter referencing the converted EUR amount. Recommended pleading language: “The original claim of BGN 97,791.50 has been converted to EUR 50,000.00 at the irrevocably fixed rate of 1 EUR = 1.95583 BGN, pursuant to [national euro introduction law] and Council Regulation (EC) No 2866/98.”

Example B, Interrupted limitation, pre-euro demand:

A creditor served a valid formal demand on 20 December 2025 for a debt of BGN 39,116.60 (originally due 1 July 2022). The demand interrupted the limitation period, restarting it from 20 December 2025. On 1 January 2026, the amount converts:

BGN 39,116.60 ÷ 1.95583 = EUR 20,000.00

The new limitation expiry is 20 December 2030 (five years from interruption). All subsequent court filings reference the EUR amount. The fact that the interrupting demand was served in BGN does not invalidate it, the demand’s legal effect as an interrupting act is unaffected by the subsequent currency conversion.

Industry observers expect Bulgarian courts to develop uniform guidance on euro-conversion pleading language during 2026. Until then, creditors should include both the original BGN figure and the converted EUR amount in all filings.

Cross-Border Issues: Debtor Abroad, Enforcement and Preservation Tools

Service, Freezing Orders and the EAPO

Where a debtor has left Bulgaria or holds assets in another EU member state, creditors have several tools available to preserve debt claims:

• Service under the EU Service Regulation: Court documents can be served on a debtor in another EU member state through designated transmitting and receiving agencies. The statute of limitations in Bulgaria is interrupted when the claim is filed with the Bulgarian court, not when the debtor receives service abroad, a crucial distinction.
• European Account Preservation Order (EAPO): Under Regulation (EU) No. 655/2014, a creditor can apply to a Bulgarian court for an order freezing the debtor’s bank accounts in any EU member state (except Denmark). The application can be made before or after obtaining a judgment.
• Hague Service Convention: For debtors in non-EU states, service must comply with the Hague Convention on the Service Abroad of Judicial and Extrajudicial Documents.

Immediate steps when a debtor leaves Bulgaria:

1. Confirm Bulgarian court jurisdiction under Regulation (EU) No. 1215/2012 (Brussels I bis).
2. Trace the debtor’s new address and identify bank accounts in the destination state.
3. Apply for an EAPO or national provisional measure before filing the substantive claim if asset dissipation is likely.
4. File suit in Bulgaria and arrange cross-border service simultaneously.

Court Practice and Traps: Recent Case Law and Constitutional Court Signals

The introduction of the absolute ten-year statute of limitations by the 2020 OCA amendments prompted significant judicial scrutiny. The Constitutional Court examined the retroactive application of the new provision and delivered rulings in 2021 clarifying its scope. Creditors should note the following practical traps identified by court practice:

• Retroactivity: The Constitutional Court confirmed that the ten-year absolute limit applies to claims that were already running at the time of the 2020 amendments, subject to specific transitional provisions. Creditors should calculate whether a pre-2020 claim has already exceeded the absolute cap.
• Debtor silence is not acknowledgement: A common creditor mistake is to assume that a debtor’s failure to respond to a demand equates to acknowledgement of the debt. Under Bulgarian law, only an affirmative written act or conduct (e.g., partial payment, signed statement) constitutes a valid interrupting acknowledgement.
• Oral promises do not interrupt: Verbal assurances of payment, even if witnessed, are extremely difficult to prove and courts generally do not treat them as valid interrupting acts.
• Late filing after prolonged enforcement: Where a creditor relied on repeated interruptions over many years, the absolute ten-year limit may extinguish the claim even though individual five-year periods were validly interrupted. This trap is particularly relevant for legacy BGN receivables now denominated in EUR.

Creditor Checklist: First 30 / 90 / 180 Days

Use this timeline-based checklist to preserve your claim systematically and avoid losing rights under the statute of limitations in Bulgaria:

• Day 0–30: Secure all original documents (contracts, invoices, delivery notes, bank statements). Calculate the exact limitation expiry date for each claim. Send a preliminary payment reminder by registered mail. Identify the debtor’s assets, addresses and bank accounts.
• Day 30–90: Serve a formal demand letter by notarised notice or registered mail with return receipt. If assets are at risk, apply for provisional measures (attachment of accounts or property). Where the debtor is abroad, investigate EAPO or cross-border service options.
• Day 90–180: If no payment or acknowledgement is received, file suit with the competent court. Record the filing date as the new interruption point. Ensure proper service (domestic or cross-border). Begin enforcement proceedings upon obtaining a court order or judgment.

Templates and Worked Examples: Practical Annex

Template A: Formal Demand Letter That Interrupts the Limitation Period

This template should be adapted by qualified Bulgarian counsel. Dated: [Date]. Sent by: Notarised notice / Registered mail with return receipt.

To: [Debtor name, address, EIK/UIC if entity]
From: [Creditor name, address, EIK/UIC if entity]
Re: Formal demand for payment, [contract/invoice reference]

We hereby formally demand payment of the sum of EUR [amount] (originally BGN [amount], converted at the fixed rate of 1 EUR = 1.95583 BGN), arising from [contract/invoice dated [date]], which became due on [due date] and remains unpaid. Payment is demanded within 14 calendar days of receipt of this notice, to account [IBAN]. Failure to pay will result in legal proceedings without further notice. This demand constitutes an interrupting act under Article 116 of the Obligations and Contracts Act.

Template B: Application for Provisional Attachment (Freezing Order)

To be filed with the competent court. Adapt with local counsel.

To: [Competent Court]
Applicant (Creditor): [Name, address, EIK]
Respondent (Debtor): [Name, address, EIK]

The applicant requests a provisional attachment (запор) over the respondent’s bank accounts held at [bank name, IBAN if known] and/or a prohibition (възбрана) over real property at [address, cadastral reference]. Grounds: The applicant holds a prima facie claim of EUR [amount] arising from [contract/invoice]. There is a reasonable risk of asset dissipation because [state reasons, debtor is transferring assets, has relocated, etc.]. Evidence attached: (1) Contract/invoice; (2) Formal demand and proof of delivery; (3) Bank statements or asset-tracing results.

Conclusion and Recommended Next Steps

The statute of limitations in Bulgaria continues to follow well-established rules under the OCA, five years for general claims, three years for certain categories, and an absolute ten-year cap for natural-person debtors. Bulgaria’s euro adoption on 1 January 2026 changed the denomination of outstanding claims but did not alter limitation periods or the mechanics of interruption and suspension. Creditors should act early to preserve claims, serve valid interrupting demands, and file suit well within the applicable period. For claims approaching the absolute ten-year limit, immediate professional review is strongly recommended. To connect with a qualified debt-collection lawyer in Bulgaria, use the Global Law Experts directory.

Timeline of Key Legislative and Changeover Dates

Sources

1. Ministry of Justice, Obligations and Contracts Act (Official Text)
2. State Gazette (Dv.parliament.bg), Promulgation of OCA Amendments
3. Bulgarian National Bank, Euro Changeover Press Release and Guidance
4. European Central Bank, Bulgaria Joins the Euro Area
5. EUR-Lex, Opinion of the ECB on Bulgaria’s Draft Law for Euro Introduction
6. Constitutional Court of the Republic of Bulgaria, Decision on Art. 112 OCA