Bulgarian Public Procurement for Foreign Companies: Using CAIS EPP
13 October 2026Corporate Clients Insights, Private companies
The Bulgarian public procurement market offers substantial opportunities for international businesses. As an EU Member State, Bulgaria applies the European procurement framework and requires the use of the European Single Procurement Document (ESPD), making participation theoretically accessible to companies established anywhere in the European Union and, in many cases, beyond.
In practice, the greatest challenge for many foreign economic operators is not the procurement legislation itself but the use of CAIS EPP (Centralised Automated Information System “Electronic Public Procurement”), the electronic platform through which all public procurement procedures in Bulgaria are conducted.
Challenges for Foreign Bidders in Bulgarian Public Procurement
The ESPD was introduced to simplify participation in public procurement across the European Union by providing a standardised self-declaration of eligibility. However, it does not replace the procedural rules applicable in each Member State.
Foreign companies participating in Bulgarian public procurement must still comply with national requirements governing electronic submission, document formats, deadlines and communication with contracting authorities. Many businesses also encounter practical difficulties when registering a CAIS EPP profile or understanding the technical requirements of the platform.
These administrative hurdles can discourage otherwise qualified companies from participating in Bulgarian tenders and may expose bidders to the risk of exclusion due to procedural non-compliance rather than any lack of technical or financial capability.
Key Steps and Deadlines on CAIS EPP
Once a procurement procedure has been opened, bidders should first identify the applicable deadline for submitting questions and requesting clarifications. Depending on the type of procedure and the applicable rules, this deadline may expire, for example, 10, 7 or 3 days before the deadline for submitting tenders.
When preparing and submitting the tender, bidders must comply with all requirements set out in the instructions, technical specifications and standard forms. Particular attention should be paid to the section of CAIS EPP in which each document or form must be uploaded. Failure to follow the submission instructions may result in exclusion, regardless of the quality of the technical or financial offer.
After submission, CAIS EPP should be monitored regularly for communications concerning the procedure. Communication with the contracting authority is conducted through the platform, including requests for additional documents, corrections or explanations. The relevant deadlines begin to run from the moment the communication is uploaded to CAIS EPP, regardless of whether the participant has opened or read the corresponding message. Any request must therefore be answered fully and within the specified period, as failure to comply may lead to exclusion.
Bidders should also monitor the platform for the contracting authority’s award decision. The statutory appeal period begins to run from the moment the decision is uploaded to CAIS EPP, regardless of whether the participant has read the notification. As this period is generally ten days, the applicable deadline should be calculated immediately after publication of the decision.
Legal Support for Bulgarian Public Procurement
At the New Balkans Law Office, we assist foreign companies throughout every stage of the procurement process in Bulgaria. Our experience includes advising international businesses on the preparation of procurement documentation, the completion of the ESPD, compliance with Bulgarian procedural requirements and the use of the CAIS EPP platform.
Where required, we can also assist with the registration of a CAIS EPP profile, prepare and review tender documentation, and submit bids electronically on behalf of participants where permitted by the applicable legal framework.
By combining knowledge of Bulgarian public procurement law with practical experience of the electronic procurement system, we help clients reduce procedural risks and participate in procurement procedures with confidence.
For businesses entering the Bulgarian market for the first time, obtaining local legal support at an early stage can significantly streamline the procurement process and minimise administrative obstacles.
Further information on the EU public procurement framework is also available from the European Commission and the Bulgarian Public Procurement Agency.
If your business is considering participation in Bulgarian public procurement, we are here to help. Please contact us at corporate@newbalkanslawoffice.com or use our contact form for professional guidance and support.