Bulgaria remains one of the more attractive destinations in the EU for setting up a business, with a flat 10% corporate tax rate and a matching 10% flat rate on personal income, among the lowest in Europe. Alongside this, Bulgaria has continued to expand its e-government infrastructure, and the Qualified Electronic Signature (QES) is now a standard tool for both local and foreign-owned companies that want to manage registrations, filings, and contracts remotely rather than in person.
What Is a Qualified Electronic Signature?
A Qualified Electronic Signature is the highest level of electronic signature recognised under EU law, specifically the eIDAS Regulation (EU No. 910/2014) and, in Bulgaria, the Electronic Document and Electronic Trust Services Act. Legally, a QES carries the same weight as a handwritten signature and is accepted across all EU member states, not only in the country where it was issued.
In Bulgaria, QES certificates are issued by licensed qualified trust service providers, such as BORICA (B-Trust) and Evrotrust, typically delivered on a smart card or USB token, though cloud-based signing options are becoming more widely available. Once issued, a QES allows both Bulgarian citizens and representatives of foreign companies to sign documents, submit filings, and authenticate themselves electronically across a wide range of Bulgarian institutions.
What Businesses Can Do With QES
A QES certificate opens up electronic access to a broad set of Bulgarian institutions and processes, including the ability to:
- register and manage a company through the Commercial Register (basic access is free, but a QES is required to view attached company documents in full),
- sign contracts and other documents digitally, noting that employment documents also require the employer to maintain a compliant system covering registered electronic mail, log management, and time stamping,
- access the e-Tax system and submit tax declarations to the National Revenue Agency,
- pay local taxes and submit declarations to municipalities,
- access the Property Register and submit related documents,
- obtain a certificate of conviction status from the courts,
- access the National Social Security Institute,
- submit declarations to the Bulgarian National Bank,
- interact with other institutions such as the Customs Agency and the Labour Bureau.
Some of these services may have limited availability for foreign persons, so it is worth confirming the specific requirements for your situation before relying on a particular process.
Applying for a QES Certificate
To obtain a QES, a company or individual applies through a licensed qualified trust service provider. The application typically requires company details, information about the legal representative, and standard contact information. Once approved, the certificate is issued, usually on a physical smart card or USB token, and can be renewed for further one-year or multi-year terms as needed.
Weighing the Practical Trade-Offs
The most commonly cited drawback of the Bulgarian QES system is that most certificates are still issued on physical smart cards or USB tokens rather than as pure cloud solutions, meaning the signer generally needs the physical device on hand to sign. That said, cloud-based and mobile-app-based signing options, offered by providers such as Evrotrust, have continued to gain ground, giving businesses more flexibility in how their representatives sign documents day to day.
The Move Toward EU Digital Identity Wallets
Under the EU’s eIDAS 2.0 Regulation (EU 2024/1183), all member states are expected to offer citizens a European Digital Identity (EUDI) Wallet capable of storing verified credentials and generating qualified electronic signatures directly from a smartphone. Bulgaria has published draft legislation to implement its national wallet, including a proposal to provide a free QES for personal, non-professional use, though full rollout is expected to take longer than the EU’s original timeline.
For now, existing QES certificates from Bulgarian providers remain fully valid and are the practical route for businesses that need to sign documents or interact with Bulgarian authorities electronically. It is, however, a space worth watching, since the way companies obtain and use qualified signatures in Bulgaria is likely to evolve over the coming years as the EUDI Wallet becomes available.
How Leinonen Can Help
Setting up a QES and using it correctly across Bulgaria’s various institutions involves a number of practical steps, and requirements can differ depending on whether you are a local entrepreneur or represent a foreign-owned business. Leinonen’s team in Bulgaria supports clients through company establishment and QES applications, helping to ensure the right forms are filed and procedures followed correctly, so that your business can focus on its core operations rather than administrative detail.
To find out more about company establishment and QES applications in Bulgaria, get in touch with our team to arrange a consultation.
