Retail sales’ indices - (at constant prices)

Time series: dTrade_2.2.1_qS_en.xls

Economic activities 2010=100 Previous quarter=100 The same quarter of 2016=100
Total 149.3 103.3 110.1
Foods, beverages and tobacco 144.6 101.7 111.3
Durable and other consumer goods 151.1 104.2 109.3

p Data are preliminary
WHOLESALE AND RETAIL SALES - Retail sales' indices
Contact organisation

National Statistical Institute

Contact organisation unit

'Trade Statistics' Department

Contact name

Lilqna Ralinska

Contact person function

Chief expert

Contact mail address

2, P. Volov Str.; 1038 Sofia, Bulgaria

Contact email address

[email protected]

Contact phone number

+359 2 9857 128

Contact fax number
Metadata update
Metadata last certified26 August 2014
Metadata last posted25 January 2014
Metadata last update26 August 2014
Statistical presentation
Data description

The index of retail sales reflects short-term trends and changes in the structure of the market consumption of the two main groups - 'Food, beverages and tobacco' and 'Durable and other consumer goods' and commodity groups, defined according to the classification of individual consumption COICOP. The information can be used for preparing economic analyzes, evaluations and short-term forecasts.

Classification system

Classification of Economic Activities (CEA-2008, for international use NACE.BG-2008).

Sector coverage

The indices of retail sales are calculated for non-financial enterprises committed retail sales of own products and/or goods without the end user in the country as a principal or business, regardless of their sectoral reference under NACE.BG 2008.

Statistical concepts and definitions

Retail sales in the country include the value of own production sold, finished goods and materials to end-user prices of the sales (incl. VAT and excise duties), except those in the catering.

Statistical unit

Non-financial enterprise

Statistical population

Non-financial enterprises committed retail sales of own products and/or goods without the end user in the country, as a principal or business, regardless of their sectoral reference on NACE.BG 2008.

Reference area

At national level: The indices are calculated and published total for the territory of Bulgaria.

Time coverage

The indices are published as time series from the first quarter of 2000 to the last reported quarter of the current reporting year.

Base period

The indices are calculated and published at 2010 as a base year.

Unit of measure

Per cent (%)

Reference period


Institutional mandate
Legal acts and other agreements
  • National Statistical Programme;
  • REGULATION (EC) №1893/2006 - translation to NACE Rev.2 and groups of activities of STS.
Data sharing

Not applicable.

Confidentiality - policy

Regulation (EC) №223/2009 on European statistics (article 20, paragraph 4) of March 11,2009, stipulates establishing common principles and guidelines to ensure the confidentiality of data used for the production of European statistics and the access to those confidential information as required for scientific and technological development and needs of users in a democratic society. Law on Statistics is stated that the individual data received and collected at the time of statistical surveys shall be statistical confidentiality and shall be used only for statistical purposes. Individual data obtained for the purposes of the statistical surveys, shall not be used as evidence to the bodies of the executive powers and the judicial authorities. Requirements, obligations and measures for data protection, as well as fines that can be imposed, are treated in separate chapters of the Law on Statistics, namely Chapter 6 'Protection of secrecy' and Chapter 9, 'Administrative penalty provisions'.

Confidentiality - data treatment

Individual data, data which could be indirectly identified, as well as aggregations of less than three statistical units and/or when the relative share of one parameter is more than 85% of the total volume of this parameter for all population units. Data which according to the Law on Statistics are confidential not published.

Release policy
Release calendar

At the national level - according to the terms set out in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute. The retail sales' indices are published about 37 - 40 days after the end of the reference quarter.

Release calendar access

The calendar is available on the NSI website:

User access

Data are published on the NSI website, section Business statistics in accordance with the Law on Statistics and the European Statistics Code of Practice respecting the professional independence and aimed at objectivity, transparency and equal treatment of all consumers.

Frequency of dissemination


Accessibility and clarity
News release

Not published.


The indices are not presented in publications.

On-line database

Data on Retail sales' indices are available to all users of the NSI website:

Micro-data access

Micro data are neither distributed nor provided to the users.


Not applicable.

Documentation on methodology

Methodology 'Retail sales' indices':

Quality documentation

Regulation (EC)  №1165/98 and Regulation (EC)  №1158/2005 on Short-term statistics required by the European Commission (Eurostat) regularly (every three years) to report to the European Parliament on the applicability of short-term data, their quality and revisions of the data.

Quality management
Quality assurance

The legal framework that regulates the production of short-term business statistics indicators states that statistics collected within the EU system must be of satisfactory quality and this quality and administrative burden that comes from what must be comparable across Member States. These criteria have been drawn up to ensure that these requirements are met, and that is reflected in the quality reports of the individual short-term indicators.

Quality assessment

The quality of the short-term variables is measured by each Member State according to common criteria. The quality of the variables is measured regularly by comparing them with other statistical information, if it is possible some quality indicators are calculated and in addition these indicators are checked for internal consistency.

User needs
  •  Bulgarian state institutions and local authorities;
  •  Business and NGOs;
  •  Analytical and associate professionals;
  •  Internal users: Directorate 'Macroeconomic Statistics'.
User satisfaction

User reviews are collected by:

  •  Direct contact - via phone and email;
  •  Indirect contact - through regional statistical offices;
  •  The customer satisfaction is not measured.

All levels of detail that are required by the National Statistical Programme is calculated and published.

Accuracy and reliability
Overall accuracy

The main source of errors is the measurement errors which arise at the data collection stage for variety of reasons, for example respondents misunderstanding what information is required or non-providing precisely the desired information.

Shall be made efforts to avoid these errors by providing assistance to the reporting units, improv the instructions attached to the questionnaire, assist the statisticians in Regional statistical offices. Most of measurement errors are detected and corrected through the logical and arithmetical controls of the Information system 'Short-term statistics' (Online Information system for data collection, editing and processing of the STS information). The system carries out the statutory and warning controls and in a case there are errors, it displays a warning dialog error in the report. The system does not allow completion of the report until they have corrected these errors by statutory controls.

Sampling error

Monitoring of retail sales is used for sample turnover 'Wholesale and retail trade, repair of motor vehicles and motorcycles' to which are added all the sample companies from other sectors that meet the necessary criteria. There is representation of the two major groups, 'Food, beverages and tobacco' and 'Durable and other consumer goods'. The sample is planned at the national level by the method of 'Stratified Random Sampe'. It is formed by two criteria - group and turnover distributed in stratums (intervals), with guaranteed representation of the results for all groups. The stratums are: 1 - complete, 2 and 3 - sampling. Sampling errors are not calculated.

Non-sampling error

Non-responders companies are valued according to the stratum in which they are faced. In stratum comprehensive assessment is done individually for each enterprise using available information on trends in the establishment and adjusted trends in reported units of the same group and stratum. Sampling strata for each cell group and an overall assessment of non-response using extrapolation coefficients calculated from the data reported in the enterprise group and stratum after eliminating extreme values. In these cases it is assumed that there are no significant differences in the behavior of responders and non-responders enterprises. Actions to reduce non-sampling errors: sending informative reminders and phone calls to collect data.

Timeliness and punctuality

NSI provides information on indices from 37 to 40 days after the end of the reporting quarter.


Retail sales' indices present ontime, according to the terms in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute.

Coherence and comparability
Comparability - geographical

The turnover indices are representative for the whole country, they are not representative for the regions of the country.

Comparability - over time

The quarterly indices are presented as time series from the first quarter of 2000 to the last reported quarter.

Coherence - cross domain

The indices are compared with the turnover indices calculated based on data from the annual survey on Structural Business Statistics. The differences are due to different coverage. SBS survey is conducted exhaustively and all enterprises are legally obliged to submit their Annual Reports to the National Statistical Institute. The STS surveys are sampling surveys. Sampling population includes companies with a turnover of over 10 thousand BGN. SBS is the source of turnover for calculation (reconciled) STS indicators.

Coherence - internal

Not applicable.

Cost and burden

Actions to reduce costs and the burden on respondents: stratified sampling and data submitted online through Information system 'Short-term statistics'.

Data revision
Data revision - policy

The retail sales' indices usually are revised two times. Each quarter data for the current quarter are published as preliminary and for the previous quarter as final. At the beginning of each year the indices for the previous year are reconciled on the basis of the comprehensive annual data from SBS.

Data revision - practice

The revised data are published on the NSI.

Statistical processing
Source data

The indices are based on survey 'Sales in industry, construction, trade and services'. Retail sales include the value of own production, finished goods and materials to the end-user selling prices (including VAT and excise duties), except those in the catering.

Frequency of data collection


Data collection

Data collection is done online (IS STS), by mail and by phone.

To reduce non-response IS STS has functionality to send an informative and a reminder letters to respondents:

  • Automatic formation of electronic letters informing respondents about the upcoming observations, in which they are included. To enable them to attach and reporting forms in PDF format and official letters;
  •  Provide automatic sending of e-mail reminders to respondents who fail to report the time (when approaching the deadline for submission of reports by the subsystem).
Data validation

Validation of data in the report:

When recording the data, the system carries out obligatory and recommended controls according to set with validation rules.

The system carries out the statutory and warning controls. In case there are errors, it displays a warning dialog error in the report. The system does not allow completion of the report until they have corrected these errors by statutory controls.

Validation of the output data:

Output data are verified at group level with regard to the previous quarter, the same quarter of the previous year and also with regard to extreme values, if necessary data are validated at the level of statistical units.

Data compilation

Retail sales' indices are estimated for two main groups of 'Food, beverages and tobacco' and 'Durable and other consumer goods'. Price effects are eliminated by the use of deflators obtained by rearrangement of products in the consumer basket in accordance with the content of the commodity groups and calculated based on average prices of the base year (2010).


Indices of retail sales not apply seasonal adjustment.

Metadata Structure Definition: ESMS_MSD+BNSI+2.0+SDMX.2.0.xml