Tax Controversy 2026 Comparisons

Tax controversies in Bulgaria usually arise following tax checks or tax audits, filing a tax return or requesting a tax relief or tax exemption.

In terms of type of taxes, the focus of the Bulgarian tax authorities is predominantly, but not only, on VAT and corporate income tax, especially in the context of related-party transactions. Values of tax assessments differ depending on the type of the business.

Disputes with tax authorities could be mitigated by providing detailed and comprehensive responses to them in a timely manner during tax audits and tax checks, as well as by having sufficient documents (such as for example invoices, payment evidence, transport documents, TP files) prepared in accordance with the local rules and ready for submission.

As a result of OECD BEPS Action plans, 2015, the TP Guidelines have reflected the respective amendments, specifically in transactions involving intangible assets and other topics as well. As a result of these updates in the TP Guidelines, the Bulgarian tax authorities have focused more on challenging the arm’s length nature of intra-group dealings leading to an increase in tax controversy. On the other hand, in light of the introduction of Council Directive (EU) 2017/1852 on tax dispute resolution mechanisms in the European Union, indirectly a result of the OECD BEPS Action Plans, 2015, MAP cases involving Bulgarian taxpayers have somewhat increased, which provides for certain remedies to controversies.

The tax assessment issued by the Bulgarian tax authorities is subject to payment or provision of bank guarantees covering the assessed amount irrespective of the fact whether it is further appealed or not.

The tax legislative acts in Bulgaria provide that different types of actions constitute administrative offences (for example non-submission or late submission of tax returns or late registration) and could be subject to administrative sanction. The imposition of such sanction is subject to appeal.

The intentional avoidance of reporting of taxes constitutes a crime under Bulgarian law and could be prosecuted.

The Bulgarian tax authorities have internal risk management and selection criteria, which are applied for assessing which individual/entity should be appointed for a tax check or tax audit procedure. These criteria can differ from sector to sector and are often repetitive for findings common for a certain industry.

However, based on experience, events/circumstances which typically give rise to a tax check or tax audit procedure are among others the following:

• requesting a tax refund/tax relief;
• accumulating tax losses;
• restructuring of the business – acquiring of a new business, liquidation, etc;
• regular transactions with related parties;
• regular application of 0% VAT rate;
• discrepancies between different types of reports (eg, VAT declarations and Intrastat, financial reports and tax declarations, etc). The introduction of SAF-T is likely to increase these cases; and 
• lack of tax audit procedure (before the statutory deadline for initiation of one to expire).

A tax audit in Bulgaria can be initiated at any time within five years after the end of the year in which a tax return is filed or should have been filed. After this five‑year period expires, the tax authorities can no longer open an audit for that period.

Once an audit is opened, it must be completed within a specific timeframe. The standard duration of a tax audit is three months, which may be extended to six months, and in more complex cases may be extended up to a maximum of one year.

The statute of limitations can prevent a tax audit: if the five‑year limitation period has expired, the authorities lose the right to initiate an audit for that tax period.

If a tax audit is initiated before the limitation period expires, the limitation period stops running for the entire duration of the audit, as well as for the duration of any administrative or judicial appeal that follows. The statute of limitation period also ceases to expire in a case under the criminal law on which the assessment of additional taxes depends.

Tax audits are generally carried out based on documents and written explanations provided by the taxpayer in the offices of the tax administration (the National Revenue Agency), not at the taxpayer’s premises. Auditors may visit the taxpayer’s premises only if a factual inspection is needed (for example, to inspect, assets or verify physical circumstances), but this is the exception rather than the rule.

Tax audits rely on both printed and electronic documents. In practice, most information is now exchanged electronically, including accounting data, reports exported from accounting software of submitted data of the current audit period, scanned supporting documents, and correspondence signed with a qualified electronic signature. Hard copy documents may be requested only if originals are needed for verification during the authorities’ check.

The deadline for provision of documents within a pending tax check or tax audit procedure is usually seven or 14 days from receipt of an official request for submission of the documents. These deadlines could be extended by another seven or 14 days. Usually, all documents prepared in a foreign language should be translated into Bulgarian before submission to the authorities.

The rules concerning cross-border exchanges of information and mutual assistance between tax authorities do not impact significantly the number of tax audit procedures and rarely constitute a reason for initiation of a tax audit procedure. However, often the Bulgarian authorities use the available instruments for cross-border assistance during already initiated tax audit procedures.

It is crucial the exact volume and quality of documents and information to be presented to the tax authorities is carefully assessed before submission. Often tax audit procedures are initiated in relation to a particular transaction, but the audited person is submitting all available information for the respective period. Such approach might jeopardise focused review of the information by the authorities or to lead to increasing the scope of the tax audit procedure.

Under Bulgarian tax procedural rules, the administrative appeal phase is mandatory before a judicial challenge to be initiated. After a tax assessment notice is issued and served, the taxpayer has a statutory period of 14 days to submit an administrative appeal. The appeal is filed through the revenue authority that issued the notice and is addressed to the Director of the “Appeals and Tax‑Insurance Practice” Directorate of the respective Territorial Tax office at the Central Office of the National Revenue Agency. The Director conducts a full review of the merits, which may include requiring additional evidence (although it is rare) and performing a comprehensive assessment of the legal grounds and factual correctness of the tax assessment. The director may issue a decision within 67 days, which may be extended in complex cases. Only once the administrative phase is completed – either through an express decision or a silent confirmation of tax audit act, may the taxpayer initiate judicial proceedings before the competent Administrative Court, again within a 14‑day statutory term.

Procedures for appealing administrative sanctions (penalties) are governed by the Administrative Penalty Decree Act rather than the Tax and Social Insurance Procedural Code. In such cases, the Penalty Decree (the act assessing the administrative sanction) is appealed directly before court. 

The competent authority to decide on the administrative appeal is the Director of the “Appeals and Tax‑Insurance Practice” Directorate, who must issue a decision on the administrative appeal within a 67‑day period from the day of submission of the appeal. The tax audit act fully or partially confirmed by a decision of the Director could be appealed before the competent administrative court within 14 days following the recipient of the decision.

If no decision is made within this period, a tacit confirmation of tax audit act is deemed to have occurred, which may be challenged again before the competent Administrative Court within 30 days following the expiry of the 67‑day period.

Judicial proceedings may be initiated only after the administrative phase has been completed, either through an explicit decision or a tacit confirmation.

Judicial tax litigation in Bulgaria may be initiated only after the mandatory administrative appeal phase has been completed. It is initiated by lodging an appeal. The appeal is submitted through the Director, and the competent court is the Administrative Court, in whose territorial jurisdiction the seat and registered address of the audited person is.

Once the Director issues a decision or fails to issue one within the 67‑day statutory period (resulting in a tacit confirmation), the taxpayer may file a judicial appeal within 14 or 30 days (30 days in case of tacit confirmation).

Judicial tax proceedings are conducted under the rules of the Code of Administrative Procedure and where it does not provide specific regulation, the Code of Civil Procedure applies subsidiarily. The court follows the standard phases of administrative litigation, which include:

• preliminary phase and allocation of the burden of proof – the court determines the scope of the dispute and assigns which party must prove which facts;
• collecting of evidence phase – submission and admission of evidence, including documents, expert reports and, when permitted by the court, witness testimony;
• oral pleadings – the parties present their final arguments on the facts and the applicable law; and
• decision phase – the court deliberates and issues its judgment.

The decision of the Administrative Court may be appealed before the Supreme Administrative Court in a deadline of 14 days from the date of receiving it, which renders the final court decision.

Evidence in tax litigation could be explanations/statements from witnesses or written documents.

Evidence is primarily documentary. All relevant documents must be submitted together with the judicial appeal or, at the latest, before the stage for collecting of evidence is closed.

Witnesses’ statements may be admitted when the court considers it helpful in establishing factual circumstances; however, it is used more rarely due to the predominantly documentary nature of tax disputes. Expert reports, especially accounting, economic or technical expertise, are frequently applied and often play a central role in resolving tax-related disputes.

In civil (administrative) tax litigation, the burden of proof is generally allocated as follows:

• the tax authorities bear the burden of proving the grounds for any additional assessment; and
• the taxpayer bears the burden of proving facts that exclude, or prevent the tax liability, as well as facts supporting exemptions, reductions or other tax reliefs.

This allocation is determined by the court at the outset of the proceedings when it issues instructions regarding the burden of proof.

In criminal proceedings, the burden of proof lies entirely with:

• the prosecution, which must prove the tax guilt against the National Fisk; and
• the defendant has no obligation to prove their innocence and benefits from the presumption of innocence.

Where proceedings concern violations related to non-payment of taxes established by an administrative act, the case is procedurally examined under criminal procedure rules.

Strategic considerations include as follows:

• the timely submission of all relevant documentation and evidence;
• requesting expert examinations;
• challenging the admissibility or evidential value of documents used by the tax authorities;
• review and putting forward arguments regarding the procedural steps followed by the tax administration – for example whether the tax audit procedure is managed by the competent tax inspectors; and
• raising legal arguments regarding the correct application of substantive tax law.

Bulgarian judicial tax proceedings do not provide for settlement or agreement with the tax authorities to end the court case. In cases involving EU law issues, the court may be asked to submit a preliminary reference to the Court of Justice of the European Union (CJEU) about interpretation of applicable EU acts.

Jurisprudence from international courts, especially ECJ, is considered in the tax court practice. The Bulgarian courts reviewing tax cases are usually aware of the settled case law of the ECJ. In addition, an average of ten referrals for preliminary rulings in tax cases are sent each year by the Bulgarian courts to ECJ, which also speaks about the relevance of the case law of this international court for the Bulgarian national courts.

In terms of international guidelines, the one most used and taken into consideration is the Commentary of OECD on the Model Tax Convention on Income and Capital.

In Bulgaria, tax disputes are resolved within a two-instance administrative court system, as follows:

• the first instance is the respective administrative court, according to the permanent address or registered seat of the addressee indicated in the act, respectively the addressees. Where the addressee indicated in the act has a permanent address or registered seat abroad, the disputes shall be examined by the Administrative Court of Sofia-city; and
• the second and final instance is the Supreme Administrative Court (SAC), which hears the case in cassation instance.

A tax assessment (Tax Audit Act) may be appealed only once. The appeal against a specific tax assessment for a specific tax period is submitted only once – through the deciding administrative authority to the competent Administrative Court. If the Administrative Court issues a judgment, that judgment may be further challenged before the Supreme Administrative Court by filing a cassation appeal. However, this cassation appeal is not a new appeal against the tax assessment itself, but a legal remedy seeking review and possible annulment of the Administrative Court’s judgment based on the already submitted initial claim. Therefore, the tax assessment is subject to only one judicial appeal, and the cassation stage concerns the court decision, not the assessment. The number of appeal stages does not depend on:

• the nature of the tax controversy;
• the value of the dispute;
• the tax involved; or
• any contradictory prior case law.

The structure is always strictly two-tiered, with SAC being the final instance. In rather rare cases (when during the first court instance serious procedural breaches are incurred or when new facts should be examined and established) the last court instance (SAC) should return the case to the first court instance to be reviewed by a different judge. The last court instance can return the case to the first court instance only once.

The appeal procedure against a tax audit act consists of two separate stages: an administrative phase and a judicial phase.

• The administrative phase begins with the submission of an appeal through the authority that issued the tax audit act to the Director of the Appeals and Tax-Insurance Practice Directorate within 14 days from the date of service of the act. The administrative authority must issue a decision within 67 days, and if no decision is issued, a tacit confirmation is deemed to have occurred. Once the administrative phase is completed, either through an explicit decision or tacit confirmation, the judicial phase begins.
• The judicial phase is initiated by filing an appeal against the administrative decision within 14 (or 30 days in case of tacit confirmation) days before the competent Administrative Court. After the Administrative Court issues its judgment, that judgment may be appealed by filing a cassation appeal before the Supreme Administrative Court, which renders the final decision. The appeal against the tax audit act itself is submitted only once, while the cassation appeal challenges the judgment of the first instance court, not the underlying tax audit act.

Cases are decided by a court’s judicial panels composed of judges, depending on whether the case is heard at first instance or on cassation.

When at first instance, before the Administrative Court, tax cases are generally heard by a single judge. The President of the Court may assign a three-judge panel in cases of factual or legal complexity or importance.

After the first, the second (and final) instance is the Supreme Administrative Court. Cassation tax cases are heard by a three-judge panel. Certain exceptional proceedings (eg, interpretative cases) may be heard by five-judge or seven-judge panels, or by the General Assembly of the respective Chamber.

No alternative dispute resolution mechanisms such as mediation or arbitration exist in Bulgaria.

The Bulgarian tax authorities could participate in mutual agreement procedures with the tax administration of another state based on provisions of a particular Double Tax Treaty, the Arbitration Convention (90/436/EEC) or Council Directive (EU) 2017/1852. This procedure usually aims at elimination of double taxation between the two states, but it is handled between the two tax administrations without the participation of the taxpayer.

This is not applicable for Bulgaria.

No agreement between a taxpayer and the tax administration on tax assessment, interest and penalties is possible in Bulgaria. In terms of administrative sanctions, the taxpayer could claim that the omission identified by the authorities is highly insignificant and request no penalty to be imposed, but it is in the discretion of the authority to decide on the request (the decision is subject to appeal).

Bulgarian legislation does not provide for binding advance information or binding tax rulings. A taxpayer might request a tax ruling, but it would not be binding for the authorities and, within potential tax audit procedure, their position could be changed. However, if a taxpayer is acting based on a tax ruling even if the position of the authorities is subsequently changed and additional taxes are assessed to this taxpayer, no interest, nor an administrative sanction could be assessed.

This is not applicable for Bulgaria.

This is not applicable for Bulgaria.

Under Bulgarian tax law, the additional tax liabilities established in a tax audit act do not automatically give rise to administrative penalties or criminal liability. The tax audit act serves only to determine the amount of public liability, but it does not in itself prove the existence of an administrative offence or a tax crime. The assessment of tax obligations, administrative penalties and criminal liability are conducted in separate legal procedures, each governed by different rules and assessed independently.

Even when the tax authorities establish that a tax has not been paid – whether due to an incorrect deduction, the improper use of tax reimbursement, the application of a GAAR/SAAR rules, or another type of adjustment – this does not automatically mean that the taxpayer has committed an offence. For administrative or criminal liability to arise, the specific elements of an infringement must be present, as defined in the Administrative Violations and Penalties Act or in the Criminal Code, where the factual elements of tax crimes are set out in the Special Part. For example, as failure to file tax returns, filing tax returns containing false information, intentional tax evasion or the use of forged documents.

Administrative penalty proceedings are initiated only if the revenue authority determines that there are grounds to do so, after which it draws up an Act for Establishing an Administrative Violation. Following any objections submitted by the taxpayer, the competent authority issues a Penalty Decree, which is subject to judicial review. This procedure is separate from the tax audit and is not triggered automatically when additional tax is assessed.

Criminal proceedings for tax offences are not initiated by the National Revenue Agency but by the Prosecutor’s Office. The tax authorities may only submit a signal when the audit identifies indications of possible intentional tax evasion. The Prosecutor’s Office then assesses whether the facts are sufficient to open pre-trial criminal proceedings. Tax adjustments, themselves, do not prove the fact of conducting a crime – criminal liability requires the presence of intent, which must be established under the rules of the Criminal Procedure Code.

The procedure for appealing a tax audit act is a public law administrative procedure, the sole purpose of which is to determine the taxpayer’s public liabilities under the Tax and Social Insurance Procedural Code. The determination of the amount of tax due and the lawfulness of the tax audit act is not a civil dispute; rather, it is part of the exercise of state authority over a taxable person. In parallel, administrative penalty proceedings under the Administrative Violations and Penalties Act or criminal proceedings under the Criminal Code may be initiated, but these are separate public law proceedings, each with its own subject matter and its own evidentiary framework.

Administrative penalty proceedings concern the establishment of an administrative violation, while criminal proceedings concern the establishment of a crime. Meanwhile, the tax audit and its subsequent judicial review determine whether tax is due and in what amount. The mere fact that additional tax has been assessed does not automatically imply the existence of an offence or a crime; the specific statutory elements of an offence under the Violation and Penalties Act or the Criminal Code must be present.

Regarding suspension, neither administrative penalty proceedings nor criminal proceedings are automatically suspended due to pending judicial review of a tax audit act. Administrative penalty proceedings may be suspended at the discretion of the revenue authorities if the determination of the violation depends on the outcome of the tax dispute, but such suspension is not mandatory. Criminal proceedings cannot be suspended on this basis, because the prosecution and the criminal court must independently establish the relevant facts and their legal qualification, and the tax audit act has no binding effect on the criminal court.

The procedure for appealing a tax audit act is a public law administrative procedure, the sole purpose of which is to determine the taxpayer’s public obligations under the Tax and Social Insurance Procedural Code. The determination of the amount of tax due and the lawfulness of the tax audit act is not a civil dispute; rather, it forms part of the exercise of state authority over the taxpayer. In parallel, administrative penalty proceedings under the Administrative Violations and Penalties Act or criminal proceedings under the Criminal Code may be initiated, but these are separate public law procedures, each with its own subject matter and evidentiary framework.

Administrative penalty proceedings relate to the establishment of an administrative violation, while criminal proceedings relate to the establishment of a tax crime, whereas the tax audit and its judicial appeal determine whether tax is due and in what amount. The fact that additional taxes have been assessed does not automatically imply the commission of an offence or a crime; the specific statutory elements of an offence under the Administrative Violations and Penalties Act or the Criminal Code must be present.

Administrative penalty proceedings for tax violations in Bulgaria begin when the tax authorities establish an infringement and draw up an Act for Establishing an Administrative Violation. The alleged offender then has the right to submit written objections, after which the competent authority issues a Penalty Decree. The Penalty Decree is subject to judicial review, which is initiated by filing an appeal before the respective District Court. The District Court conducts a full review of the Penalty Decree and renders a decision, which may be further appealed before the Administrative Court acting as a cassation instance. This procedure is entirely separate from the procedure concerning the tax audit act.

Criminal proceedings are initiated only by the Prosecutor’s Office, and only where the tax authorities have identified indications of intentional tax evasion (for example, through the submission of false tax returns, concealment of taxable income, or the use of forged or misleading documents). The criminal process begins with the opening of pre-trial proceedings, during which evidence is collected through investigative actions such as interrogations, document reviews and expert examinations. If sufficient evidence is gathered, the prosecutor submits an indictment to the competent criminal court. The case is then heard by a criminal panel of the District Court for less severe offences, or the Regional Court for more serious tax crimes. This criminal court is different from the Administrative Court, which hears disputes regarding the legality of the underlying tax assessment under the tax audit act. Criminal judgments may be appealed before a higher criminal court – either the Regional or the Appellate Court – and, in certain cases, before the Supreme Court of Cassation, depending on the classification and severity of the offence.

Even if the additional tax assessment is immediately paid by the taxpayer, the latter could not benefit from reduction of potential fines applicable to the corresponding tax offence. Generally, the tax assessment made with a tax assessment act is subject to payment once the act is received by the taxpayer irrespective of whether the act would be appealed.

In terms of reduction of fines for tax and other offences, the taxpayer and the authority assessing the fine under certain circumstances could conclude an agreement in terms of which the taxpayer admitted that an offence occurred. Such an agreement results in reduction of the fine by 70%.

No settlement or agreement with the authorities is possible in Bulgaria in terms of procedures for assessment of taxes and imposition of administrative penalties.

Criminal tax cases may be avoided only through a plea agreement with the Prosecutor’s Office under the Criminal Procedure Code. Such an agreement is possible only if the accused admits guilt in respect of the crime for they are accused. The court must approve the agreement, and only then is the criminal case terminated. This applies exclusively to criminal proceedings and does not automatically affect the validity of the underlying tax assessment.

Criminal tax cases in Bulgaria follow the ordinary criminal appeal structure. A judgment of the first instance criminal court may be appealed before the appellate criminal court competent for that level:

• if the case was heard by the District Court, the appeal goes to the Regional Court; and
• if the case was heard by the Regional Court, the appeal goes to the Appellate Court.

In certain cases, the appellate decision may further be subject to cassation review before the Supreme Court of Cassation, which is the highest criminal court. The criminal appeal process is entirely separate from the administrative court review of the tax audit act, which is handled by the Administrative Courts and has no direct procedural connection to the criminal appeal routes.

Even if a transaction or operation is challenged by the tax authorities and even in case of assessment of additional tax obligations, it is rather rare for a criminal case to be opened/prosecuted.        

This is not a common approach to use domestic litigation against an administrative decision in respect of a double taxation situation due to an additional tax assessment or tax adjustment in a cross-border situation; however, such a corresponding adjustment could be requested in Bulgaria, which could in turn lead to a tax audit or a tax check. The MLI minimum standards have not yet had a significant impact in this area.

Historically, the Bulgarian tax authorities have relied on GAAR and SAAR in tax disputes with the taxpayers, even in situations involving cross-border transactions and having DTT implications, which approach has been generally confirmed by the Bulgarian courts. We would not expect the PPT to have a significant impact on tax controversies.

Transfer pricing adjustments have generally been challenged by the Bulgarian tax authorities on the grounds of the domestic legislation, although in certain situations referring to Article 9 of the respective DTT, stipulating the arm’s length principle in cross-border transactions.

The Bulgarian legislation does not provide for unilateral/bilateral advance pricing agreements – ie, such could not be concluded/approved by the Bulgarian tax authorities.

If the audited taxpayer or its related party has concluded an agreement in another state, it is in the discretion of the court to decide on its relevance to the particular case.

Currently, transfer pricing appears to be generating the more significant part of litigation, followed by WHT and PE implications. The transfer pricing controversies could be mitigated to a certain extent by maintaining comprehensive TP documentation, as well as by providing clear explanations on transactions structure and economic rationale to the tax administration upon its inquiry on this subject.

There is no public information on state aid disputes involving taxes in Bulgaria.

This is not applicable for Bulgaria.

There is no public information on state aid disputes involving taxes in Bulgaria.

There is no public information on state aid disputes involving taxes in Bulgaria.

Bulgaria ratified the Multilateral Convention to Implement Tax Treaty Related Measures to Prevent Base Erosion and Profit Shifting (MLI) on 16 September 2022, and it entered into force for Bulgaria on 1 January 2023. While Bulgaria adopted several provisions of the MLI (such as the Principal Purpose Test), the application of Part VI (Mandatory Binding Arbitration) has not been opted for. Bulgaria has motivated this with the limited number of MAPs and their resolving within an acceptable timeframe. Bulgaria does not have an arbitration clause in its DTTs.

Bulgaria has not opted to apply Part VI (Arbitration) to its tax treaties and does not incorporate such a clause in its current DTT network.

This is not applicable for Bulgaria.

The EU Directive on Tax Dispute Resolution Mechanisms (Directive (EU) 2017/1852) is transposed in the Bulgarian legislation. Bulgaria also applies the EU Arbitration Convention to settle transfer pricing disputes and the attribution of profits to permanent establishments between EU member states.

The authors are not aware of the Bulgarian tax authorities not coming to an agreement with the other counterparty and this arbitration procedure has not been observed.

Pillar Two has been adopted and applicable since 1 January 2024. The authors do not believe that the current system could provide specific instruments which would be able to mitigate controversies related to this subject.

Generally, only the number of cases is published, but the resolutions on the MAPs are not available.

The most commonly used options involve the domestic rules, followed by the old DTT and the EU Dispute Resolution Directive, considering older tax periods are currently under review. It could be expected that the EU Dispute Resolution Directive will be the more relied-upon instrument for MAP in the future.

Professionals are widely hired by taxpayers for tax controversies and disputes. The tax authorities rely on their internal experts in court litigation.

There are no state fees payable at the administrative appeal stage in Bulgaria.

First Instance Before Administrative Court (Appeal Against a Tax Assessment)

The fee is paid when filing the appeal:

• EUR5.11 (BGN10) for individuals who are not traders and NGOs; and
• EUR25.56 (BGN50) for companies (legal entities) and individuals who qualify as traders under Bulgarian commercial law.

Cassation Instance Before Supreme Administrative Court

The cassation appellant pays the court fee upon lodging the appeal:

• EUR35.79 (BGN70) for individuals, sole traders, public bodies and organisations performing public functions; and
• EUR189.18 (BGN370) for companies and other organisations.

When the case has a determinable monetary value, the fee is proportional instead of fixed:

• 0.8% of the material interest, capped at EUR869.20 (BGN1,700).

For exceptionally large disputes exceeding EUR5.11 million (BGN10,000,000), the fee is EUR2,301.05 (BGN4,500).

Special Cases (Pension, Health, Social Security Matters)

These amounts apply regardless of material interest:

• EUR15.34 (BGN30) for individuals and sole traders; and
• EUR102.26 (BGN200) for organisations and public bodies.

The taxpayer pays the fee upon submitting the appeal. If the court case is resolved successfully for the taxpayer, the state fess and lawyers’ fees paid are subject to reimbursement by the other party, and vice versa.

If the tax assessment is annulled or declared null and void, the taxpayer may submit a claim for damages in a separate (civil) procedure (usually financial damages) under the State and Municipal Liability for Damages Act.

Bulgaria does not provide formal ADR mechanisms for tax disputes. There is no mediation, settlement or arbitration available for tax assessments.

Official granular statistics on pending tax cases are not published in Bulgaria. Typically, Administrative Courts handle several hundred tax cases annually, while the Supreme Administrative Court hears a similar number of cassation appeals. On average, administrative judges handle a broad portfolio of administrative cases (not only tax), and the number of tax-specific cases per judge varies from court to court.

There are no official public statistics broken down by tax type. In practice, most tax litigation relates to VAT, followed by corporate income tax, personal income tax and withholding tax. Customs and other indirect tax cases represent a smaller portion of the annual caseload.

No formal success rate statistics are published. Based on general observations, outcomes vary significantly depending on the facts and level of technical complexity. Taxpayers succeed in a substantial number of cases, particularly those involving procedural breaches or transfer pricing disputes, while the tax authorities prevail in cases involving formal reporting omissions or clear statutory violations.

In the authors’ opinion, the key strategic considerations in Bulgarian tax disputes include:

• collecting and presenting all relevant documents at the earliest possible stage;
• requesting expert evidence where technical or accounting issues are involved;
• focusing on procedural irregularities in the tax audit, which courts often examine very strictly;
• developing EU law arguments where applicable (eg, withholding tax, cross-border payments, VAT);
• considering a MAP request for cross-border disputes;
• ensuring timely filing and strict compliance with procedural deadlines; and
• maintaining consistent legal and factual arguments throughout administrative and judicial phases.