Tax Appeal Bulgaria: How to Challenge a Revision Act
1 October 2026A tax audit rarely feels urgent until the revision act (ревизионен акт) actually arrives – the formal assessment issued by Bulgaria’s National Revenue Agency (NRA) at the end of an audit or inspection. From that point, strict deadlines apply, and the route available to challenge the assessment narrows with every week that passes. This guide sets out how tax disputes are actually resolved in Bulgaria, from the first administrative appeal through to litigation and, for cross-border cases, treaty-based relief.
How a Tax Dispute Begins in Bulgaria: The NRA Revision Act
Most disputes originate in one of two ways: a routine audit or inspection by the NRA that continues with a revision report and concludes with a revision act adjusting the taxpayer’s declared liability, or a rejection of a voluntary disclosure or refund claim. The revision act sets out the additional tax, interest and any penalties assessed, and it is this document – not the earlier audit correspondence – that starts the clock on the taxpayer’s right to challenge the assessment.
The Main Stages of a Tax Appeal in Bulgaria
Once an inspection is initiated and carried out, NRA issues a revision report which contains information about the scope of the inspection, the facts and circumstances established by NRA and the evidence supporting them, the factual and legal conclusions, and a proposal for determination of the liability of the taxpayer. The audited taxpayer may file a written objection and submit evidence within 14 days of the service of the revision report to the authorities that conducted the audit.
After the revision report is issued and the window for objection is closed, NRA issues a revision act which sets out the liability of the taxpayer. Revision acts are subject to both administrative and court challenge. Here comes the important difference – the objection to a revision report may be recommended, but it is not compulsory and does not prevent the dispute from developing, while if the taxpayer aims to challenge the results from the audit in court, they shall first challenge the revision act before the competent administrative body and only after that in court. In addition to this, it is important to mention that, in general, neither the administrative appeal, nor the appeal before court, suspends the fulfillment of the obligations set forth in the revision act and for such a suspension a separate request shall be filed.
Step 1: Administrative Appeal to the NRA
A revision act cannot be challenged directly in court. It must first be appealed to the Director of Appeals and Tax-Insurance Practice at the relevant NRA regional directorate, within 14 days of being served. This administrative appeal is decided on the papers, and the Director may confirm, amend or annul the revision act, in whole or in part, but cannot increase the amount of the tax liability.
This stage is not a formality, a well-prepared administrative appeal can resolve a dispute without ever reaching court, and the arguments and evidence submitted at this point often shape what can later be raised in litigation. Moreover, the administrative appeal is an absolute prerequisite to challenge the revision act in court. It also defines the boundaries of that later judicial review: anything not raised at the administrative stage can’t be raised afterward. That is why expert legal advice on whether to challenge the revision act in full or only in part – and which part(s) – is so valuable to any taxpayer looking to protect their rights.
Step 2: Judicial Review of a Tax Appeal in the Administrative Court
Where the administrative appeal is unsuccessful, or only partially successful, the taxpayer may bring the matter before the competent Administrative Court within 14 days of being served the Director’s decision. The administrative court reviews both the legal and factual basis of the assessment and can order expert accounting or valuation evidence where the dispute turns on figures rather than pure legal interpretation.
A decision of the Administrative Court may in turn be appealed on certain points of law to the Supreme Administrative Court, which is the final domestic instance.
Cross-Border Tax Disputes and the Mutual Agreement Procedure
Where a dispute involves double taxation, for example, both Bulgaria and another state assessing tax on the same income, domestic appeal routes may not fully resolve the problem. Bulgaria’s network of more than 70 double tax treaties, together with the EU Tax Dispute Resolution Mechanism Directive, which was transposed and incorporated into national law, namely in the Tax-Procedure Code, allows taxpayers to request a Mutual Agreement Procedure (MAP), under which the competent authorities of both states negotiate to eliminate the double taxation. A MAP request generally runs in parallel with, rather than instead of, domestic appeal proceedings, and the interaction between the two needs to be managed carefully so that domestic deadlines are not missed while a MAP is pending. This treaty network is the same one underpinning the cross-border planning we describe on our Tax practice page, and the reporting side of cross-border structuring is covered separately in our guide to DAC6, CRS and beneficial ownership reporting
Practical Considerations Before Filing a Tax Appeal
- Short deadlines – missing the 14-day window for an administrative appeal extinguishes the right to challenge the revision act at all.
- Interest consequences – interest continues to accrue on disputed tax during the appeal process, so an early assessment of the strength of the case matters commercially, not just legally. If the challenge is successful the interest paid by the taxpayer as well as any excessive tax which was declared by the competent authority to not be owed, can be intercepted or recovered.
- Voluntary disclosure before an audit begins is generally treated far more favourably than a dispute arising after a revision act has been issued.
- Where penalties (rather than the underlying tax) are the main point of contention, the proportionality of the penalty is often a more fruitful ground of appeal than disputing the tax base itself, but the exact grounds for appeal depend on the details of the matter and are subject to professional legal assessment.
Frequently Asked Questions
How long do I have to appeal a Bulgarian tax revision act?
An administrative appeal to the Director of Appeals and Tax-Insurance Practice must be filed within 14 days of the revision act being served. A further 14-day deadline applies to appeal an unfavourable administrative decision to the Administrative Court.
Can I go straight to court without appealing to the NRA first?
No. The administrative appeal to the Director of Appeals and Tax-Insurance Practice is a mandatory first step before a revision act can be challenged before the Administrative Court.
What is a Mutual Agreement Procedure and when is it useful?
A MAP is a treaty-based mechanism allowing the competent tax authorities of several states to negotiate a resolution where the same income risks being taxed multiple times. It is most useful in cross-border disputes and typically runs alongside, not instead of, domestic appeals.
Does an appeal suspend the obligation to pay the assessed tax?
Filing an appeal does not automatically suspend enforcement, though interim relief can sometimes be sought. Interest continues to accrue on the disputed amount while the dispute is ongoing, which is an important factor in deciding how quickly to act.