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For any question on data and metadata, please contact: Eurostat user support |
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1.1. Contact organisation | National Statistical Institute of Bulgaria |
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1.2. Contact organisation unit | Environmental and Energy accounts Department |
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1.5. Contact mail address | National Statistical Institute 2, P. Volov Str.; 1038 Sofia, Bulgaria |
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2.1. Metadata last certified | 06/07/2022 | ||
2.2. Metadata last posted | 06/07/2022 | ||
2.3. Metadata last update | 15/06/2022 |
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3.1. Data description | |||
European statistics on natural gas prices for household and final non-household customers. |
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3.2. Classification system | |||
Internal Eurostat classification system based on annual natural gas consumption bands and tax levels. |
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3.3. Coverage - sector | |||
Household sector and final non-household sector (industry, services, offices, agriculture, etc). |
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3.4. Statistical concepts and definitions | |||
The prices are collected in national currency (BGN) per GJ and according to different bands of consumption. For the household customers, the following bands are applied:
For the final non-household customers, the following bands are applied:
Two different levels of disagregation for semestrial and annual prices exist: 1- Semestrial prices: These prices are reported twice per year in 3 levels:
2- Annual prices: These prices are reported once per year together with the data for the second semester and are allocated into the following components and taxes:
State subsidies - Remarks on Gas Prices data for Households for 2nd semester of 2021 and Components for 2021: 1. At the end of 2021, in response to the increased prices of natural gas for the final consumers, Bulgarian government has approved a program to compensate the household customers for a several winter months starting with December 2021. This affected current 2nd semester reporting together with the components for 2021 and will affect the next reporting for 1st semester of 2022. The program envisages a temporary mechanism to support household customers through the gas suppliers in the form of a monthly compensation, calculated and invoiced for every customer based on its consumption for the month. The compensations are fixed price in BGN/MWh without VAT and that is why they are deducted from the total final amount after VAT charging. 2. Gas price reporting of 2nd semester of 2021 - The compensations provided by the state for December 2021, but weighted with the quantities of natural gas consumed for the period July - December 2021, are deducted from the third level of natural gas prices "All taxes incl." after the VAT charging. 3. Gas price reporting of Components of 2021 - The compensations provided by the state for December 2021, but reported on annual basis, are included in subcomponent "Other" of component "Taxes, fees, levies and charges".
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3.5. Statistical unit | |||
Household and final non-household consumers divided into consumption bands. |
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3.6. Statistical population | |||
Target of the survey are household and final non-household customers buying natural gas for their own use that is distributed through mains. Combined deliveries of Compressed natural gas (CNG) via trailers are excluded. Household customers: 2019 - Data are reporting by 20 suppliers out of 21 and represent 100% of the household customers. One company do not supply household customers. 2020 - Data are reporting by 20 suppliers out of 21 and represent 100% of the household customers. One company do not supply household customers. 2021 - Data are reporting by 24 suppliers out of 25 and represent 100% of the household customers. One company do not supply household customers. Final non-household customers: 2019 - Data are reported from 21 suppliers out of 21 and represent 100% of the final non-household customers. 2020 - Data are reported from 21 suppliers out of 21 and represent 100% of the final non-household customers. 2021 - Data are reported from 25 suppliers out of 25 and represent 100% of the final non-household customers. |
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3.7. Reference area | |||
The national territory of the Republic of Bulgaria. |
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3.8. Coverage - Time | |||
Natural gas prices data for Bulgaria are available since 2007. |
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3.9. Base period | |||
Not applicable. |
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Prices are reported in national currency (BGN) per GJ. However, Eurostat also calculates and publishes the prices in EURO and PPS (purchasing power parity) and do the conversion to kWh. |
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For semestrial prices, the reference periods are January - June for semester 1 and July - December for semester 2. For annual prices, the reference period is the whole calendar year (January - December). |
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6.1. Institutional Mandate - legal acts and other agreements | |||
At EU level:
At National level:
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6.2. Institutional Mandate - data sharing | |||
At EU level:
At national level:
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7.1. Confidentiality - policy | |||
At EU level:
At national level:
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7.2. Confidentiality - data treatment | |||
Published data do not allow identification of single consumers. Individual data on prices are not published (they are suppressed), following Art. 25 of the Law on Statistics. Publishing of individual data is made under Art. 26 of the Law on Statistics. |
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8.1. Release calendar | |||
The date for publication of statistical information on prices is listed in the Annual Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute. Data on prices of natural gas for household and final non-household customers is published three months after the reporting period according to the requirements of Regulation (EU) 2016/1952 on natural gas end electricity prices. |
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8.2. Release calendar access | |||
Release Calendar | National statistical institute (nsi.bg)
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8.3. Release policy - user access | |||
According to Article 23 of the Law on Statistics of Bulgaria "The National Statistical Institute and statistical authorities shall announce to the public the results from the statistical surveys through the mass media, their websites, in own publications or by other means, in compliance with the provisions of Chapter Six." for all users at the same time. |
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Natural gas prices in Bulgaria are published twice per year at the NSI website - section Energy, Information system "Infostat" and on Eurostat's database. |
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10.1. Dissemination format - News release | |||
No national press release related to the data. |
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10.2. Dissemination format - Publications | |||
No other national publications related to the data. |
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10.3. Dissemination format - online database | |||
Online information system "Infostat" at the NSI website - https://infostat.nsi.bg/
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10.3.1. Data tables - consultations | |||
No national database related to the number of consultations of these data. |
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10.4. Dissemination format - microdata access | |||
NSI of Bulgaria doesn't give access to microdata related to gas prices. |
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10.5. Dissemination format - other | |||
Information service upon request according to the Rules for dissemination of statistical products and services, published at the following link: |
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10.5.1. Metadata - consultations | |||
Not applicable. |
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10.6. Documentation on methodology | |||
Metadata and methodology files are available at the NSI website, section Statistical data/Energy: Electricity and natural gas prices | National statistical institute (nsi.bg) Natural gas prices for final non-household customers | National statistical institute (nsi.bg) Natural gas prices for household customers | National statistical institute (nsi.bg)
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10.6.1. Metadata completeness - rate | |||
0,9 |
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10.7. Quality management - documentation | |||
https://nsi.bg/en/content/4172/electricity-and-natural-gas-prices The latest quality report 2018 on the Electricity and Natural Gas prices (for reporting years 2016,2017 and 2018) is published on the NSI's website - section Statistical data/Energy via the above mentioned link.
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11.1. Quality assurance | |||
NSI has developed and implemented Quality Management System (QMS) according to the international standard ISO 9001:2008 since 2015. After several successful certification audits made, NSI is currently certified with ISO 9001:2015 and ISO/IEC 27001:2013. http://www.nsi.bg/sites/default/files/files/images/Sertification_32639-15-S_ISO9001.pdf https://www.nsi.bg/sites/default/files/files/images/Sertificat_ISO_27001.pdf Implementation of the QMS includes: Regulation for QMS, Ordinance for the activity of Quality Council, Procedures, Programme for achieving aims regarding quality, Programme for the activity of Quality Council, Training on QMS, Reports, Audit. The NSS Quality Assurance framework includes methods and tools that aim to guarantee the compliance with the requirements to the statistical processes and products, and to ensure the required statistical information quality. This information is available at the NSI's website via the link below: NSS Quality Assurance framework
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11.2. Quality management - assessment | |||
Data are with good quality. |
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12.1. Relevance - User Needs | |||
No information available for users of these data exactly, as they have free access to NSI website. |
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12.2. Relevance - User Satisfaction | |||
No user satisfaction survey has been carried out especially for this dataset. |
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12.3. Completeness | |||
Data fully meet the requirements of the Regulation (EU) 2016/1952 - in terms of Annex I. |
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12.3.1. Data completeness - rate | |||
The ratio of the number of data cells provided to the number of data cells required: Table 1: 100% Table 2: 100% Table 3: 100% Table 4: 100% |
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13.1. Accuracy - overall | |||
Data are reliable, the accuracy is good. Gas prices data are verified with the decisions of EWRC, determinating natural gas prices and components for the company public supplier and for the natural gas distribution companies. The comparative analyses are made with the data for previous periods. |
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13.2. Sampling error | |||
No sampling used as the data covers 100% of the population. |
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13.2.1. Sampling error - indicators | |||
Not applicable. |
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13.3. Non-sampling error | |||
Information is included in the sub-concepts S.13.3.1-S.13.3.5. |
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13.3.1. Coverage error | |||
As 100% of the population is covered by the data, all kinds of unit are represented. |
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13.3.1.1. Over-coverage - rate | |||
There are no over-coverage in the data. |
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13.3.1.2. Common units - proportion | |||
100% of the data come from the survey. |
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13.3.2. Measurement error | |||
The responding units and statistical experts are not exempted automatically from errors in reading, calculating and recording the numerical values. As the Excel questionnaire and summary files are not automated, these errors are verified and corrected manually. |
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13.3.3. Non response error | |||
0%. |
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13.3.3.1. Unit non-response - rate | |||
The unit non-response rate is 0%. |
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13.3.3.2. Item non-response - rate | |||
The item non-response rate is 0%. |
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13.3.4. Processing error | |||
Gas price questionnaire for collecting primary data from the suppliers is Excel formatted. At national level we aggregate manually all data in Summary Excel file where national data (previously checked and verified) are calculated by formulas and that is why no processing errors occurred. We don't use specific tool and calculations are not automated. |
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13.3.5. Model assumption error | |||
Not Applicable. |
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14.1. Timeliness | |||
Natural gas providers that participate in the national data collection are requested to provide the natural gas prices data within one month after the reference period. After submission, NSI experts check the micro-data for correctness, consistency and completeness. National averages are calculated and reported to Eurostat during the third month after the reference period. |
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14.1.1. Time lag - first result | |||
The first version of the natural gas price questionnaire for households for the 1st semester of 2019 was sent 89 days after the reference period. The first version of the natural gas price questionnaire for households for the 2nd semester of 2019 was sent 91 days after the reference period. The first version of the natural gas price questionnaire for households for the 1st semester of 2020 was sent 92 days after the reference period. The first version of the natural gas price questionnaire for households for the 2nd semester of 2020 was sent 90 days after the reference period. The first version of the natural gas price questionnaire for households for the 1st semester of 2021 was sent 91 days after the reference period. The first version of the natural gas price questionnaire for households for the 2nd semester of 2021 was sent 90 days after the reference period. The first version of the natural gas price questionnaire for non-households for the 1st semester of 2019 was sent 89 days after the reference period. The first version of the natural gas price questionnaire for non-households for the 2nd semester of 2019 was sent 91 days after the reference period. The first version of the natural gas price questionnaire for non-households for the 1st semester of 2020 was sent 92 days after the reference period. The first version of the natural gas price questionnaire for non-households for the 2nd semester of 2020 was sent 90 days after the reference period. The first version of the natural gas price questionnaire for non-households for the 1st semester of 2021 was sent 91 days after the reference period. The first version of the natural gas price questionnaire for non-households for the 2nd semester of 2021 was sent 90 days after the reference period. |
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14.1.2. Time lag - final result | |||
Version 2 of the natural gas price questionnaire for Non-households for the 2nd semester of 2019 was sent 365 days after the reference period, 365 days after the first version and 456 day(s) after the mandatory deadline. The reason is that after successful negotiations between Bulgargaz EAD and ООО Gazprom Export, on March 2, 2020 was signed an addendum to the contract for the supply of natural gas to Bulgaria. A new mechanism has been agreed for calculating the delivery gas price according to a hybrid formula. With the new pricing formula has been reached a decrease of the gas delivery prices and it was applied retroactively as of August 5, 2019 - the date on which Bulgargas EAD sent to Gazprom Export the request for revision of the gas price. The applying of the new price mechanism led to differences in delivery prices by months for the period August 5, 2019 - March 31, 2020. Version 3 of the natural gas price questionnaire for Non-households for the 2nd semester of 2019 was sent 692 days after the reference period, 601 days after the first version and 601 day(s) after the mandatory deadline. The reason for the revision is that in the first version of the questionnaire, in Table 4 “Consumption volumes in %), only data for group 6 were marked as confidential. According to the rules for secondary confidentiality, the cell with the lowest value (for group 1) have to be also marked as confidential in order to avoid disclosing the true confidential value. Version 2 of the natural gas price questionnaire for Non-households for the 2nd semester of 2020 was sent 326 days after the reference period, 236 days after the first version and 236 day(s) after the mandatory deadline. The reason for the revision is that in the first version of the questionnaire, in Table 4 “Consumption volumes in %), only data for group 6 were marked as confidential. According to the rules for secondary confidentiality, the cell with the lowest value (for group 1) have to be also marked as confidential in order to avoid disclosing the true confidential value. Version 2 of the natural gas price questionnaire for Households for the 2nd semester of 2019 was sent 456 days after the reference period, 365 days after the first version and 365 day(s) after the mandatory deadline. The reason is that after successful negotiations between Bulgargaz EAD and ООО Gazprom Export, on March 2, 2020 was signed an addendum to the contract for the supply of natural gas to Bulgaria. A new mechanism has been agreed for calculating the delivery gas price according to a hybrid formula. With the new pricing formula has been reached a decrease of the gas delivery prices and it was applied retroactively as of August 5, 2019 - the date on which Bulgargas EAD sent to Gazprom Export the request for revision of the gas price. The applying of the new price mechanism led to differences in delivery prices by months for the period August 5, 2019 - March 31, 2020. |
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14.2. Punctuality | |||
100% of the questionnaires submitted up to the legal deadline that is the third month after the reference period. |
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14.2.1. Punctuality - delivery and publication | |||
60 days between the delivery/release date of data. Target date on which data are scheduled for delivery/release: 1st semester - 30th July/30th September 2nd semester - 30th January/30th March |
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15.1. Comparability - geographical | |||
Data are representative at national level and fully correspond with the requirements of the Regulation (EU) 2016/1952. |
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15.1.1. Asymmetry for mirror flow statistics - coefficient | |||
Not applicable. |
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15.2. Comparability - over time | |||
Data have been comparable since the 1st semester of 2017. |
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15.2.1. Length of comparable time series | |||
No break in time series. |
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15.3. Coherence - cross domain | |||
Not applicable. |
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15.3.1. Coherence - sub annual and annual statistics | |||
Not applicable |
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15.3.2. Coherence - National Accounts | |||
Not applicable |
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15.4. Coherence - internal | |||
Annual prices are coherent with the semestrial prices. |
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The amount of costs for Natural gas prices survey is estimated to: 2019 = 2993 EUR 2020 = 9178 EUR 2021 = 9893 EUR No specific survey on the burden of respondents. |
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17.1. Data revision - policy | |||
No revision policy is established for the organisation regarding this data. |
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17.2. Data revision - practice | |||
No planned revisions of data. Unplanned revisions are made in case of detecting different types of errors - tehnical errors, discrepancies with previous periods. |
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17.2.1. Data revision - average size | |||
For this reporting period - 2019, 2020 and 2021 years which include 6 (six) reporting semesters, revisions of the data on natural gas prices to end customers have been made for the following reporting semesters for 2 (two) reasons: * For Non-household customers: * For Household customers: Taking into account the above, we define the magnitude of the revisions as small. Households gas prices collection: 0.001579318 Non-households gas prices collection: 0.008938296 |
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18.1. Source data | |||
Data provided by gas traders (suppliers) delivering natural gas to final customers through mains. |
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18.2. Frequency of data collection | |||
Biannual for the periods January - June and July - December. |
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18.3. Data collection | |||
The survey is mandatory according to the annual National Statistical Programme. Data are collected using the Excel questionnaire by email. |
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18.4. Data validation | |||
Validation procedures include:
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18.5. Data compilation | |||
Prices are calculated using Excel as a weighted average prices. For the purpose the invoiced quantity of natural gas and its value from each gas supplier by type of final customers and by consumption band are used. |
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18.5.1. Imputation - rate | |||
No imputations are performed related to the data. |
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18.6. Adjustment | |||
No adjustments are carried out. |
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18.6.1. Seasonal adjustment | |||
Seasonable adjustments are not carried out. |
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