A Guide to Corporate Taxes in Bulgaria

Introduction to Corporate Tax in Bulgaria

Understanding the corporate tax system in Bulgaria is essential for any company planning to operate or expand in the country. With one of the most competitive tax environments in the European Union (EU), businesses must balance the benefits of low taxation with strict compliance requirements.

Beyond filings and the corporate tax rate in Bulgaria, companies can benefit from various incentives, including regional tax relief and deductions that can significantly reduce effective tax liability. At the same time, failure to meet payment deadlines or comply with regulations can lead to penalties, making proper tax management critical.

In this guide, let’s find all the important information, including the corporate tax rate in Bulgaria, and other aspects. 

What Is the Corporate Tax Rate in Bulgaria?

The country applies a flat Corporate Income Tax (CIT) rate of 10% on taxable profits of resident companies and permanent establishments, making it one of the lowest rates in the EU. 

• Bulgaria follows a uniform corporate tax system, meaning the same 10% rate applies regardless of company size, turnover, or legal structure. 
• Resident companies are taxed on worldwide income. Non-resident companies are taxed only on Bulgarian-source income. 
• Certain sectors or activities in Bulgaria may fall under different rules:
  • 15% alternative tax for specific gambling-related activities
  • Tonnage-based taxation for shipping companies instead of standard corporate tax 
• Large multinational groups (with revenues above €750 million) may face an effective minimum tax of 15% under OECD global tax rules, though the base statutory rate remains 10%. 

Breakdown of Corporate Income Tax Components

To better understand Bulgaria’s corporate tax system, it’s important to break down the components that make up the overall corporate tax burden. Unlike many countries, Bulgaria has a highly centralized, simplified tax structure, with minimal tax layering across different government levels.

Corporate Tax Filing Requirements in Bulgaria

The process of corporate tax filing in Bulgaria is largely digital, deadline-driven, and self-assessment-based, making accuracy and timely submission critical for businesses.

• Documents Required for Filing: To complete corporate tax compliance services in Bulgaria, businesses must prepare and submit:
  • Annual CIT return (standardized form)
  • Annual financial statements and statistical activity report
  • Supporting accounting records and profit calculations (kept for audit purposes)
• Advance Tax Payments: The corporate tax system in Bulgaria requires advance payments depending on company size:
  • Monthly installments for companies with higher revenues
  • Quarterly installments for medium-sized businesses
  • Small or newly established companies may be exempt from advance payments
• Filing Method and Digital Platforms: Bulgaria has a fully digitized filing system:
  • Tax returns must be submitted electronically via the NRA portal.
  • A Qualified Electronic Signature (QES) is required for submission.
• Payment Methods: Companies must complete their CIT payments through bank transfer to NRA-designated accounts. Proper tax codes must be included to ensure the correct allocation of payments.
• Corrections and Extensions: While standard extensions are not typically granted, businesses can:
  • Submit a corrected tax return before the statutory deadline.
  • File an adjusted return later for certain corrections under specific rules.
• Penalties for Non-Compliance: Failing to meet payment deadlines or filing incorrect returns can result in:
  • Financial penalties typically range from BGN 500 to BGN 3,000
  • Additional sanctions for serious violations or repeated non-compliance 

Corporate tax filing in Bulgaria is a structured and digital-first process with clear deadlines, standardized documentation, and strict penalties for delays. Businesses that follow proper compliance can benefit from a predictable and efficient filing system.

Tax Year and Payment Deadlines in Bulgaria

To effectively manage corporate tax filing in Bulgaria, businesses must understand the country’s tax year structure and payment timing. 

• Standard Corporate Tax Year: The corporate tax system in Bulgaria is based strictly on the calendar year. There is no option to adopt a different fiscal year.
• Annual Tax Filing and Final Payment Deadline: After the tax year ends, companies must complete filing within the statutory deadline:
  • Annual tax return must be filed between 1 March and 30 June of the following year.
  • Any remaining corporation tax in Bulgaria must be paid by 30 June.
• Advance Corporate Tax Payments (Installments): The CIT rate in Bulgaria is applied through a pay-as-you-go system requiring advance payments based on prior revenue:
  • Monthly installments:
    • Required if revenue exceeds BGN 300,000
    • Payments:
      • January–March: Due by 15 April
      • April–December: Due by the 15th of each current month
  • Quarterly installments:
    • Required if revenue is between BGN 300,000 and BGN 3,000,000
    • Payments:
      • Due by the 15th day of the month following each quarter
      • No payment required for Q4
  • Exemptions from advance payments:
    • Companies with revenue below BGN 300,000
    • Newly established businesses (in most cases)
• Final Tax Settlement: At year-end, companies reconcile advance payments with actual liability under the CIT:
  • Any underpaid tax must be settled by 30 June of the following year.
  • Overpayments can be offset or refunded. 
• Adjustments to Advance Payments: Businesses can revise their estimated tax liability during the year:
  • Adjustments must typically be submitted before December.
  • Interest may apply if advance payments significantly understate actual tax liability. 

Bulgaria follows a structured system combining annual filing with monthly or quarterly installments. This approach ensures steady tax collection while requiring businesses to actively manage compliance throughout the year.

Withholding Taxes and Other Business Taxes in Bulgaria

In addition to the standard CIT, businesses must account for WHT and other indirect taxes that form an important part of the overall corporate tax system in Bulgaria. These taxes mainly apply to cross-border payments and consumption rather than corporate profits directly.

Corporate Tax Incentives, Deductions, and Exemptions

To complement Bulgaria’s low corporate tax rate, the government offers a range of incentives, deductions, and exemptions to attract investment, support innovation, and encourage regional development. 

• Regional Investment Incentives (Up to 100% Tax Relief): One of the most significant corporate tax incentives in Bulgaria is aimed at companies investing in high-unemployment regions:
  • Businesses engaged in manufacturing activities may receive up to 100% corporate tax exemption on profits.
  • The tax saved must be reinvested in qualifying assets or activities.
• R&D Tax Incentives and Innovation Support: Bulgaria has strengthened its innovation framework within the CIT system:
  • Companies can claim an additional 25% deduction on eligible Research and Development (R&D) expenses.
  • Accelerated depreciation may apply to R&D-related assets and technologies. 
• Tax Loss Carryforward Rules: Businesses can optimize CIT through loss relief provisions:
  • Tax losses can be carried forward for up to 5 years.
  • Losses can offset future taxable profits, reducing tax liability in profitable years. 
• Depreciation and Capital Allowances: The corporate tax system in Bulgaria allows structured deductions for capital investments. Accelerated depreciation is available for certain asset categories (e.g., machinery, equipment, technology). This reduces taxable income in earlier years of investment.
• Interest Deductibility: Companies can deduct financing costs under specific limits:
  • Net borrowing costs are deductible up to 30% of Earnings Before Interest, Taxes, Depreciation, and Amortization (EBITDA).
  • This is particularly relevant for leveraged businesses and group financing structures. 

Beyond the low CIT, the country offers a wide range of deductions, exemptions, and targeted incentives. These measures make corporate tax compliance services in Bulgaria especially valuable for businesses looking to fully leverage available tax benefits while remaining compliant.

International Tax Treaties and Double Taxation Avoidance

Bulgaria has signed 71 DTTs with countries worldwide, including major economies such as the United States, the United Kingdom, Germany, France, India, and China. These DTTs are designed to eliminate or reduce double taxation by clearly defining which country has the right to tax specific types of income (e.g., business profits, dividends, interest, royalties). 

How Businesses Avoid Double Taxation

Companies engaged in international operations can avoid double taxation through two main mechanisms:

• Tax Credit Method (Primary Approach): Bulgaria generally applies the tax credit method, allowing companies to deduct foreign taxes paid from their Bulgarian CIT liability.
• Exemption Method (in Certain Cases): In some situations, such as when a foreign company does not have a permanent establishment in Bulgaria, income may be taxed only in one jurisdiction under treaty provisions. 

To access treaty relief during corporate tax filing in Bulgaria, businesses must meet specific requirements, such as:

• Provide a tax residency certificate from the foreign jurisdiction
• Prove beneficial ownership of income
• Demonstrate genuine economic activity (no conduit structures) 

Bulgaria’s broad network of treaties and clear relief mechanisms make it easier for businesses to operate internationally without facing double taxation. Proper use of these treaties is essential for efficient corporate tax filing in Bulgaria and optimizing global tax exposure.

How Commenda Supports Corporate Tax Compliance in Bulgaria

Managing corporate tax filing in Bulgaria can be complex due to strict deadlines, documentation requirements, and evolving regulations. Commenda simplifies this process by offering an integrated, end-to-end solution that helps businesses stay compliant while optimizing their tax position.

• Business Registration and Tax Setup: Commenda supports companies from the very beginning by handling:
  • Company incorporation and registration with the Bulgarian authorities
  • Tax registrations, including CIT and VAT
  • Set up of compliant accounting and reporting structures
• Corporate Tax Filing and Reporting: For ongoing compliance, Commenda manages the full process of company tax filing in Bulgaria:
  • Preparation and submission of CIT returns
  • Filing of annual financial statements and reports
  • Integration with accounting systems for accurate data flow
• Automated Compliance Monitoring: One of the key advantages of using Commenda is proactive compliance tracking:
  • Automated reminders for corporate tax payment deadlines in Bulgaria
  • Real-time status tracking of filings and obligations
  • Centralized dashboard for multi-entity compliance

Commenda streamlines every aspect of corporate tax filing in Bulgaria, from registration to reporting and optimization. Its combination of automation, expert support, and global infrastructure ensures businesses remain compliant while focusing on growth.

Book a free demo today and get expert help with tax compliance in Bulgaria.