TL;DR:
- Bulgaria’s 2026 accounting deadlines include filings on March 31, June 30, September 30, and April 30. Compliance requires electronic submissions with verified electronic signatures or personal IDs, and missing deadlines results in fines or operational issues. Early filings and proper preparations help avoid penalties and ensure legal and financial transparency.
Annual accounting deadlines in Bulgaria for 2026 are defined by a structured calendar of tax filings, financial statement submissions, and advance payment obligations that every registered business must meet to stay compliant. The Bulgarian National Revenue Agency enforces these dates strictly, and missing them triggers fines, audit exposure, and operational restrictions. For international business owners, the key dates cluster around march 31, april 30, june 30, and september 30. Understanding each deadline, its legal basis, and its consequences is the foundation of sound fiscal management in Bulgaria.
1. What are the annual accounting deadlines in Bulgaria for 2026?
Bulgaria’s fiscal year follows the calendar year, running from january 1 to december 31. The annual accounting cycle for 2026 covers obligations arising from the 2025 fiscal year. The primary deadlines are:
- March 31, 2026: Early corporate tax filing and payment deadline to qualify for the 5% discount
- April 30, 2026: Personal income tax return deadline for individuals with rental, property sale, or other non-trade income
- June 30, 2026: Corporate income tax return and payment deadline; personal income tax deadline for sole traders and registered farmers
- September 30, 2026: Deadline to publish Annual Financial Statements in the Bulgarian Commercial Register
These four dates govern the majority of annual compliance obligations under the Corporate Income Tax Act and the Personal Income Tax Act. Each carries distinct procedures, filing methods, and penalty structures.
2. Corporate income tax filing and payment deadlines
The mandatory deadline for filing the annual corporate income tax return and paying corporate tax in Bulgaria is june 30, 2026. Bulgaria’s corporate tax rate is a flat 10%, one of the lowest in the European Union. The filing window opens on march 1, 2026, giving companies a four-month period to prepare and submit their returns electronically through the National Revenue Agency portal.
Filing requires either a qualified electronic signature (QES) or a personal identification code (PIC) issued by the NRA. Both methods authenticate the submission and create a legal record of compliance. International business owners who have not yet obtained a PIC should do so well before the filing window opens.
Key corporate tax obligations include:
- Filing the annual corporate income tax return (Form 1010) by june 30, 2026
- Paying the full corporate tax liability by june 30, 2026
- Reconciling advance tax payments made during 2025 against the final liability
- Submitting any corrections or amended returns within the statutory period
Pro Tip: File and pay by march 31, 2026, to qualify for the 5% early-filing discount on your corporate tax liability, capped at €511. Many foreign-owned companies default to the june 30 deadline and miss this incentive entirely.
3. Annual Financial Statements: publication deadline and penalties
The deadline to publish Annual Financial Statements (AFS) in the Bulgarian Commercial Register is september 30, 2026, covering the 2025 fiscal year. This obligation applies to all commercial companies registered under Bulgarian law, regardless of size or activity level. The AFS publication is separate from the tax return filing and serves a distinct legal purpose: it creates public transparency about a company’s financial position.
Non-publication carries serious consequences. Fines are imposed on both the company and its management. Beyond financial penalties, missing the AFS deadline creates administrative friction that blocks company changes, including amendments to the articles of association, ownership transfers, and financing applications. Banks and potential investors treat unpublished financials as a signal of poor governance.
Critical points for AFS compliance:
- AFS must be prepared in accordance with Bulgarian National Accounting Standards or International Financial Reporting Standards, depending on company size
- The Commercial Register, operated by the Registry Agency, accepts electronic submissions only
- Audited financial statements are required for companies meeting specific size thresholds under the Accountancy Act
- The AFS filing is distinct from the corporate tax return filed with the NRA
Pro Tip: Publish your AFS well before september 30, 2026. Late publication, even by one day, triggers the penalty process. Companies with active bank relationships or pending financing rounds face the most immediate operational impact.
4. Personal income tax deadlines for individuals and sole traders
The annual personal income tax return deadline for sole traders and registered farmers is june 30, 2026. For other individuals with taxable income from rent, property sales, or foreign sources, the deadline is april 30, 2026. These two dates reflect different legal categories of taxpayer under the Personal Income Tax Act.
Over 520,000 individuals declared income before the april 30 deadline in the most recent reporting cycle. That volume confirms that the NRA processes a significant wave of filings in april, and submitting early reduces the risk of portal congestion or processing delays.
Key distinctions for individual filers:
- Sole traders and registered farmers: june 30, 2026 deadline for both the income declaration and tax payment
- Individuals with rental or investment income: april 30, 2026 deadline for the annual tax return
- Employees with only employment income: generally exempt from filing if their employer has withheld the correct tax
- Social insurance contributions: sole traders must also declare and pay social contributions by the june 30 deadline
The NRA portal pre-fills available data from employer reports and third-party sources. Verifying this pre-filled data before submission is a necessary step, as errors in pre-filled fields remain the taxpayer’s legal responsibility.
5. How advance tax payments affect your 2026 compliance calendar
Advance corporate tax payment requirements depend on the company’s prior-year turnover. The thresholds are:
- No advance payments required: companies with prior-year turnover at or below €153,387
- Quarterly advance payments: companies with prior-year turnover between €153,387 and €1,533,876
- Monthly advance payments: companies with prior-year turnover above €1,533,876
Advance payment deadlines fall on the 15th day of the month following the end of each payment period. For quarterly payers, this means payments are due in april, July, october, and january. For monthly payers, the obligation recurs every month throughout the year.
| Turnover Threshold | Payment Frequency | Due Date |
|---|---|---|
| Up to €153,387 | None | N/A |
| €153,387 to €1,533,876 | Quarterly | 15th of following month |
| Above €1,533,876 | Monthly | 15th of following month |
6. Electronic filing requirements and compliance best practices
Nearly 372,000 firms declared their revenues before the june 30 deadline in the most recent filing cycle, reflecting the broad adoption of digital compliance in Bulgaria. The NRA portal pre-fills corporate data from prior submissions, VAT returns, and third-party reports. This pre-filling reduces manual entry but does not eliminate the need for careful review.
International business owners face a specific challenge: the NRA portal and the Commercial Register both require authenticated electronic access. A qualified electronic signature issued by a Bulgarian-accredited provider, or a personal identification code from the NRA, is mandatory for all filings. Obtaining these credentials takes time, and delays in the process can push filings dangerously close to deadlines.
Best practices for meeting Bulgaria’s 2026 accounting deadlines:
- Obtain a QES or PIC before the march 1 filing window opens
- Verify pre-filled NRA portal data in january or february to identify discrepancies early
- Reconcile advance tax payments against the estimated annual liability before june 30
- Submit AFS to the Commercial Register by september 15 to allow time for any technical rejections
- Retain all filed documents and payment confirmations for at least five years
Dormant companies may submit a simplified declaration of inactivity by june 30 instead of full financial statements. This exemption satisfies reporting requirements and avoids administrative fines, but the declaration must still be filed on time.
For a broader view of how these deadlines fit within Bulgaria’s overall tax framework, the 2026 business tax guide published by TaxManagement covers corporate rates, VAT obligations, and withholding tax rules in one reference.
7. Audit obligations and financial reporting standards
Bulgaria’s audit requirements under the Accountancy Act apply to companies that meet two of three size criteria: total assets above €2,000,000, net revenue above €4,000,000, or average headcount above 50 employees. Companies exceeding these thresholds must have their AFS audited by a registered statutory auditor before publication in the Commercial Register.
The financial reporting standards applicable in Bulgaria are either the Bulgarian National Accounting Standards (BNAS) or the International Financial Reporting Standards (IFRS). Publicly traded companies and financial institutions must apply IFRS. Most small and medium enterprises use BNAS, which aligns closely with EU accounting directives.
The audit deadline is tied directly to the september 30 AFS publication deadline. Auditors must complete their work and issue their opinion before the company can publish. Engaging an auditor in january or february, rather than waiting until the summer, is the most reliable way to meet the september deadline without pressure.
Key Takeaways
Bulgaria’s 2026 accounting compliance calendar requires businesses to act on four critical dates: march 31, april 30, june 30, and september 30, with electronic filing mandatory for all submissions.
| Point | Details |
|---|---|
| Early filing discount | File and pay corporate tax by march 31, 2026, to claim a 5% discount capped at €511. |
| Corporate tax deadline | The annual corporate income tax return and payment are both due by june 30, 2026. |
| AFS publication | Publish Annual Financial Statements in the Commercial Register by september 30, 2026, to avoid fines. |
| Advance payments | Companies with turnover above €153,387 must make quarterly or monthly advance tax payments. |
| Electronic access | A qualified electronic signature or NRA personal identification code is required for all filings. |
TaxManagement’s accounting services for Bulgaria’s 2026 deadlines
Meeting Bulgaria’s accounting and tax deadlines requires more than calendar awareness. It demands accurate financial records, authenticated electronic access, and knowledge of the specific forms and procedures the NRA and Commercial Register require. TaxManagement has supported more than 1,500 international firms with corporate tax returns, Annual Financial Statement preparation, and electronic filing in Bulgaria. The firm’s team of legal, accounting, and IT professionals handles the full compliance cycle, from advance payment calculations to AFS publication. For businesses new to Bulgaria, TaxManagement also assists with company registration and the setup of the electronic credentials needed to file. Contact TaxManagement directly to discuss your 2026 compliance requirements.
FAQ
What is the corporate tax filing deadline in Bulgaria for 2026?
The annual corporate income tax return and payment are both due by june 30, 2026. The filing window opens on march 1, 2026.
Can I get a discount for filing corporate tax early in Bulgaria?
A 5% early-filing discount, capped at €511, applies if you file and pay your corporate tax electronically by march 31, 2026.
When must Annual Financial Statements be published in Bulgaria?
Annual Financial Statements for the 2025 fiscal year must be published in the Bulgarian Commercial Register by september 30, 2026. Non-publication results in fines and operational restrictions.
What is the personal income tax deadline for sole traders in Bulgaria?
Sole traders and registered farmers must file their annual personal income tax return and pay by june 30, 2026. Individuals with rental or investment income face an earlier deadline of april 30, 2026.
Do dormant companies have to file in Bulgaria?
Dormant companies may submit a simplified declaration of inactivity by june 30, 2026, instead of full financial statements, satisfying their reporting obligations under Bulgarian accounting law.
