A Bulgarian builder does not obtain a general construction licence. Instead, when the Construction Chamber Act requires it, the builder must be entered in the Central Professional Register of Builders maintained by the Bulgarian Construction Chamber (KSB). The Bulgarian abbreviation is CPRS (Tsentralen profesionalen registar na stroitelya, ЦПРС).

The certificate records the construction groups, categories, or individual works the company may perform. Choosing the wrong scope can leave an otherwise capable contractor unable to execute the project.

This guide explains when CPRS entry is mandatory, how groups differ from construction categories, what the Chamber tests, and how registration is maintained in 2026.

Construction classification is project-specific, and the register's forms, prices, and annual deadlines can change. Confirm the intended scope with the designer, supervising consultant, contracting authority, and CPRS regional unit before filing. This guide is general information, not legal or engineering advice.

CPRS Registration at a Glance

When Is Registration Required?

The Construction Chamber Act published by KSB covers Bulgarian and foreign traders, branches, and state or municipal enterprises building in Bulgaria. CPRS entry is generally required where the builder:

• executes a category I, II, III, IV, or V construction under Article 137 of the Spatial Development Act; or
• performs separate construction and installation works falling within the “Construction” section of the Bulgarian Classification of Economic Activities.

The obligation follows the work performed, not the company's objects or NACE code. Incorporation alone is insufficient. KSB membership is voluntary and distinct from compulsory CPRS entry.

The Act has a narrow exception for certain low-rise residential and villa buildings and specified category V structures up to 100 square metres. Confirm the project's category and statutory subparagraph before relying on it.

Our company-registration guide covers the entity-formation step that normally comes before a Bulgarian company's CPRS application.

Construction Groups Are Not Categories

Two classifications determine the certificate's scope. A group identifies the field of construction, while the category reflects the project's significance, complexity, and risk under the Spatial Development Act.

The fifth group is not fifth-category construction. A specialist may be registered for individual group-five works, while a general contractor may hold groups with category ranges.

The category hierarchy also has limits:

• first-category registration within an approved group covers categories I–V in that group;
• second-category registration covers categories II–V, but not category I;
• registration for category III, IV, or V covers only the category or categories stated in the register; and
• group-five registration covers only the listed individual works.

Take the category from the permit and project documents; descriptions such as “residential project” do not reliably determine it.

Core Eligibility Conditions

Article 15 requires legal, financial, technical, staffing, experience, and insurance capacity. The builder must:

• have no enforceable public tax or social-security liabilities, unless payment has lawfully been deferred or placed on an instalment plan;
• not be in insolvency proceedings, declared insolvent, or in liquidation;
• have the machinery and technical equipment necessary for the requested work;
• employ personnel for technical management, construction-product and quality control, OHS, disaster protection where applicable, and other regulated functions;
• use technically qualified and competent management staff and appropriately qualified workers; and
• maintain professional liability insurance under Article 171 of the Spatial Development Act for the requested category.

The Chamber obtains a Bulgarian applicant's public-debt data ex officio, but liabilities must still be cleared or formally rescheduled.

The CPRS instructions call for at least one employee in each of three functions: technical management, quality/construction-product control, and OHS control. Do not assume one person may cover several roles without checking the current form. Our occupational-health-service guide explains the separate employer duty; external coverage does not replace the builder's site-safety function.

Published Financial and Capacity Thresholds

The current initial-entry instructions still show these thresholds in legacy lev. Euro equivalents use the fixed BGN 1.95583 rate only to help read 2026 accounts; confirm the units expected by the live form.

Do not apply these figures to categories IV and V; their criteria are scope-specific, as are cultural-property conditions. A company younger than three years reports its available period, but appointing an experienced manager does not itself establish company-level capacity.

Equipment may be owned, leased, or rented if access is proved. Support experience with permits, site acts, acceptance or use documents, and contracts that identify the applicant and executed part.

Documents for Initial Entry

The online application generates declarations and schedules. A typical file includes:

1. Application and scope selection for one or more groups, categories, or group-five works.
2. Bulgarian register identification or, for a foreign entity, official evidence of establishment with the required Bulgarian translation and authentication.
3. Declaration that the applicant is not insolvent or in liquidation.
4. Staff schedule, qualifications, experience evidence, and active employment confirmation.
5. Training data, including current occupational-safety instruction where required.
6. Machinery and equipment schedule showing ownership, lease, rental, or another right of use.
7. Project-experience schedule supported by permits, contracts, site records, and completion evidence.
8. Financial information for the previous three years, or the available period for a young builder.
9. Information about Spatial Development Act sanctions and applicable specialist permits for higher-risk facilities.
10. Declaration and evidence of professional liability insurance matching the highest requested category.
11. Payment document and any scope-specific schedules.

Use the CPRS initial-registration instructions as the filing checklist. ISO certificates, membership, and references do not replace mandatory personnel, financial, insurance, or project evidence.

Registration Procedure and Timing

1. Map the Intended Work

Map planned contracts, permit categories, and self-performed packages. Applying too broadly creates evidence gaps; too narrowly can block execution.

2. Audit the Eligibility Evidence

Reconcile payroll, accounts, assets, insurance, and project evidence. Names, dates, and employer identity must match.

3. Complete and Submit the CPRS File

Submit through an accepted regional or electronic channel; electronic filing requires a qualified signature. Foreign evidence needs an official Bulgarian translation and corresponding completion documents.

4. Commission Review

The Commission decides within 14 days; the certificate or refusal is issued within 15 days. These periods assume a properly filed application, so preparation and corrections make the full project longer.

The certificate specifies the approved scope, which is then visible in the public register. A refusal or deletion decision may be challenged under the Administrative Procedure Code.

CPRS Prices Published for 2026 Use

The Chamber's published euro price schedule states the following amounts, excluding VAT:

Annual coefficients are 2.7 for category I, 1.8 for II, 1.15 for III, 1.0 for IV, and 0.80 for group-five works. Add coefficients for multiple scopes, allow for VAT, and confirm the generated payment order.

Foreign, EU, EEA, and Swiss Builders

A foreign builder establishing sustained operations in Bulgaria normally follows the standard register route, either directly where legally possible or through its Bulgarian branch. The branch-office guide explains the establishment side; CPRS eligibility remains a separate assessment.

An EU, EEA, or Swiss provider entitled to build at home may use the temporary or one-off service procedure for a specific Bulgarian project. It notifies the Commission and supplies home-state evidence with Bulgarian translation and the building permit or linked main-contractor agreement. The certificate covers only that project and approved work.

Duration, repetition, establishment, and actual activity determine whether a service is temporary. A recurring project pipeline points toward standard registration.

Annual Confirmation, Changes, and Register Control

Registration creates continuing duties:

• notify changes in registered circumstances within 14 days;
• submit annual financial information by 30 June under the ordinary statutory rule;
• maintain the employees, qualifications, equipment, insurance, and other conditions supporting the approved scope; and
• pay the annual service price for the scopes retained.

The CPRS announced an exceptional deadline of 30 September 2026 at 17:00 for 2025 data. It is year-specific, not a permanent replacement for June. The annual-service instructions explain the workflow.

CPRS has no routine “pause” button. Duties continue until scope reduction or deletion. Annual control can reduce scope or delete an entry if criteria fail; more than three years without construction is another deletion ground, subject to the foreign-builder exception.

Insolvency, liquidation, loss of an Article 15 condition, missed annual filing, and repeated unreported changes can also cause deletion. The certificate is invalidated and reapplication is generally barred for one year. Report a lost certificate within seven days.

Public Procurement, Consortia, and Subcontractors

A CPRS certificate proves registered scope, not a tender's separate turnover, experience, expert, equipment, financial, or insurance criteria.

Where an association or consortium performs regulated construction, the Act requires at least one participant to be registered. That rule does not allow every unregistered member to execute regulated work independently. Work allocation should identify which registered participant performs each package.

A main contractor's certificate is not blanket cover for an unregistered subcontractor. Match every package to the subcontractor's public scope before tender and mobilisation.

Frequent Registration Mistakes

• confusing the five groups with the five construction categories
• selecting scope from marketing descriptions instead of the building permit
• relying on a manager's CV without company-level project evidence
• presenting equipment lists without proof of access
• allowing employment, insurance, or public-debt status to lapse during review
• treating Chamber membership as the legal basis for construction
• using indicative fees instead of the generated current payment amount
• missing the 14-day change notice or assuming the 2026 annual extension repeats automatically
• assuming a CPRS certificate satisfies every public-procurement condition

Practical Pre-Filing Checklist

• Building-permit category and work packages mapped to exact CPRS groups
• Requested category supported by staff, financials, assets, and experience
• Technical manager, quality/product controller, and OHS controller properly employed and documented
• Machinery access evidenced by ownership, lease, or rental records
• Project history supported by official completion and site documents
• Professional liability policy matches the highest requested scope
• Public liabilities cleared, deferred, or placed on an approved instalment plan
• Foreign documents translated and authenticated as required
• Current fee generated and paid with the correct reference
• Internal diary created for the 14-day change duty and annual confirmation

How Lion Consult Can Help

Lion Consult can coordinate company or branch setup, map contracts to CPRS scope with technical advisers, review personnel and experience evidence, prepare corporate documents, and structure consortium or subcontract arrangements.

Contact Lion Consult before committing to a tender or mobilisation date. Early scope review is usually far less expensive than correcting an insufficient registration after contract award.

Frequently Asked Questions

When is CPRS registration mandatory in Bulgaria?

Registration is generally required for builders executing category I–V construction or separate construction and installation works within the KID Construction sector. A narrow exception covers specified low-rise structures and certain small category V works, so the actual contract scope must be classified before relying on it.

What is the difference between a CPRS group and category?

A group describes the type of construction, while a category describes its complexity, importance, and risk under spatial-development law. A builder's entry must cover both the relevant group and the category needed for the intended project.

How long does CPRS registration take?

The registration commission decides within 14 days after a complete application is received. The chamber then issues the certificate or a reasoned refusal within 15 days of that decision, although corrections and missing evidence can extend the practical timeline.

How much does CPRS registration cost in 2026?

The initial entry fee is 0.1% of the builder's prior-year net sales, with a minimum of EUR 613.55 and maximum of EUR 15,338.76, excluding VAT. Extending an entry costs EUR 255.65 excluding VAT, and the annual service price uses the chamber's published formula with a EUR 186.62 coefficient.

Can an EU builder work temporarily in Bulgaria without full CPRS entry?

A builder lawfully established in another EU or EEA state may use the temporary cross-border services route when its work in Bulgaria is genuinely temporary and occasional. It must make the prescribed declaration and provide current home-state evidence before starting the relevant works.

What ongoing duties follow CPRS registration?

Registered builders must report relevant changes within 14 days and submit annual financial, staffing, equipment, quality, and safety data through the chamber's system, normally by 30 June. For 2025 reporting data, the chamber announced an exceptional deadline of 30 September 2026 at 17:00.