Reference metadata describe statistical concepts and methodologies used for the collection and generation of data. They provide information on data quality and, since they are strongly content-oriented, assist users in interpreting the data. Reference metadata, unlike structural metadata, can be decoupled from the data.
Statistical Office of the Republic of Slovenia (SURS)
1.2. Contact organisation unit
Environmental Statistics Division; Section for Environment and Energy Statistics
1.3. Contact name
Confidential because of GDPR
1.4. Contact person function
Confidential because of GDPR
1.5. Contact mail address
Statistical Office of the Republic of Slovenia, Litostrojska 54, SI-1000 Ljubljana
1.6. Contact email address
Confidential because of GDPR
1.7. Contact phone number
Confidential because of GDPR
1.8. Contact fax number
Confidential because of GDPR
2.1. Metadata last certified
30 June 2025
2.2. Metadata last posted
30 June 2025
2.3. Metadata last update
30 June 2025
3.1. Data description
European statistics on natural gas prices for household and final non-household customers.
3.2. Classification system
Internal Eurostat classification system based on annual natural gas consumption bands and tax levels.
3.3. Coverage - sector
Household sector and non-household sector (industry, services, offices, agriculture, etc).
3.4. Statistical concepts and definitions
The prices are collected in national currencies per GJ and according to different bands of consumption.
For the households sector, these bands are:
D1: Customers consuming less than 20 GJ.
D2: Customers consuming 20 GJ or more but less than 200 GJ.
D3: Customers consuming 200 GJ or more.
For the final non-households sector, the bands are:
I1: Customers consuming less than 1000 GJ.
I2: Customers consuming 1000 GJ or more but less than 10000 GJ.
I3: Customers consuming 10000 GJ or more but less than 100000 GJ.
I4: Customers consuming 100000 GJ or more but less than 1000000 GJ.
I5: Customers consuming 1000000 GJ or more but less than 4000000 GJ.
I6: Customers consuming 4000000 GJ or more.
There exist 2 different levels of disagregation for semestrial and annual prices:
1- Semestrial prices:
These prices are reported twice a year and are divided in 3 levels:
Level 1 prices: Prices excluding taxes and levies.
Level 2 prices: Prices excluding VAT and other recoverable taxes and levies.
Level 3 prices: Prices including all taxes and levies.
2- Annual prices:
These prices are reported once a year together with the data for the second semester and are divided into the following components and taxes:
Energy and supply: commodity price for natural gas paid by the supplier or the price of natural gas at the point of entry into the transmission system, including, if applicable, the following end-user costs: storage costs plus costs relating to the sale of natural gas to final customers.
Network cost: transmission and distribution tariffs, transmission and distribution losses, network costs, after-sale service costs, system service costs and meter rental and metering costs.
Value added taxes (VAT): as defined in Council Directive 2006/112/EC.
Renewable taxes: taxes, fees, levies or charges relating to the promotion of renewable energy sources, energy efficiency and CHP generation.
Capacity taxes: taxes, fees, levies or charges relating to strategic stockpiles, capacity payments and energy security; taxes on natural gas distribution; stranded costs and levies on financing energy regulatory authorities or market and system operators.
Environmental taxes: taxes, fees, levies or charges relating to air quality and for other environmental purposes; taxes on emissions of CO2 or other greenhouse gases. This component includes the excise duties.
All other taxes: taxes, fees, levies or charges not covered by any of the previous four categories: support for district heating; local or regional fiscal charges; island compensation; concession fees relating to licences and fees for the occupation of land and public or private property by networks or other devices.
In addition to these elements, the network cost is split into the respective shares of transmission and distribution. The relative share of consumption in the different consumption bands is reported by the countries and used to calculated the single national natural gas prices (weighted averages for consumer bands IA-IF and DA-DE) but not published because it could be used to re-calculate some confidential values.
Some of the taxes are refundable. Here is a description of them:
Household and final non-household consumers divided into consumption bands.
3.6. Statistical population
Household customers: Data coming from 17 suppliers out of 17 and representing 100% of the household customers. Households network costs data are collected by 11 distributors.
Non-household customers: Data coming from 17 suppliers out of 17 and representing 100% of the final non-household customers. Non-household etwork costs data are collected by 12 distributors.
3.7. Reference area
Whole country (Slovenia).
3.8. Coverage - Time
Natural gas prices data for Slovenia are available since 2nd semester of 2007.
3.9. Base period
Not applicable.
Prices are reported to Eurostat in national currency per GJ. However, Eurostat also calculates and publishes the prices in EURO and PPS (purchasing power parity) and do the conversion to kWh. Relative shares of sub-component of the network component and consumption volumes are reported in percentages.
For semestrial prices, the reference periods are from January to June for semester 1 and from July to December for semester 2.
For annual prices, the reference period is the whole calendar year (from January to December).
6.1. Institutional Mandate - legal acts and other agreements
At EU level:
Regulation (EU) 2016/1952 of the European Parliament and of the Council of 26 October 2016 on European statistics on natural gas and electricity prices and repealing Directive 2008/92/EC (Text with EEA relevance).
Commission Implementing Regulation (EU) 2017/2169 of 21 November 2017 concerning the format and arrangements for the transmission of European Statistics on natural gas and electricity prices pursuant to Regulation (EU) 2016/1952 of the European Parliament and of the Council (Text with EEA relevance).
Commission Implementing Decision (EU) 2018/1734 of 14 November 2018 granting derogations to the Federal Republic of Germany, the Kingdom of Spain, the Italian Republic and the Republic of Cyprus as regards the provision of statistics pursuant to Regulation (EU) 2016/1952 of the European Parliament and of the Council (notified under document C(2018) 7465) (Text with EEA relevance).
Commission Implementing Regulation (EU) 2019/803 of 17 May 2019 concerning the technical requirements regarding the content of quality reports on European statistics on natural gas and electricity prices pursuant to Regulation (EU) 2016/1952 of the European Parliament and of the Council (Text with EEA relevance.)
Eurostat does not share the data collected with other organisation appart from its usual dissemination chanel (Eurostat's database, statistic explained articles and press or news release) .
At national level:
Data are shared with Energy Directorate, Ministry of Infrastructure (based on mutual agreement of data sharing)
Data are sent to Eurostat.
Data are shared with other organizations (IEA) - quartely prices data
7.1. Confidentiality - policy
At EU level:
Regulation (EC) No 223/2009 of the European Parliament and of the Council, of 11 March 2009, on the transmission of data subject to statistical confidentiality to the Statistical Office of the European Communities.
Published data should not allow identification of single consumers.
The method applied to confidential data on a national level is cell suppression (instead of number the cell contains z). For the reporting to Eurostat confidential data are flagged with c.
8.1. Release calendar
Statistical results and services are available free of charge, in the same way they are accessible to every user and are published according to a pre-announced release calendar. They are also available in English. Data are published on SURS's website and SiStat database on T+65 days basis every quarter (i.e. in March, June, September and December). Half yearly data are published in March and September, along with quarterly data. In March also annual data are published. Release calendar is released at the end of every year for the next reporting year and is publicly available.
Data is released (i.e. published on SURS's website as First release and SiStat database) as determined in the release calendar. All data (excluding confidential data) is released to the general public and is therefore publicly available to any interested individual/institution/organization... Users are also informed on data release via social networks (Facebook, Twitter). Statistical data are disseminated to all users at the same time.
Natural gas prices in Slovenia are published on a semestrial basis on Eurostat's website.
First Releases are published on a SURS’s website according to a pre-announced release calendar and at the same time data are published in a publicly accessible data base (SiStat database).
10.2. Dissemination format - Publications
Data is also disseminated (published) in annual national statistical publications:
Stat'o'book (annualy printed SURS's publication, available also in PDF format online)
Published in non-statistical publications:
Annual Reports on the energy sector in Slovenia (The Energy Agency of Slovenia)
Annual Reports on the business operations of companies on the energy sector in Slovenia (Ministry of Infrastructure)
It is estimated that around 2000 consultations (page visits in the SiStat database for natural gas prices tables) occur anually.
10.4. Dissemination format - microdata access
Microdata is available on SURS, since SURS has direct access to the administrative source. Data are being collected in EPOS administrative database (operated by Energy Directorate, Ministry of Infrastructure).
10.5. Dissemination format - other
No other dissemination format.
10.5.1. Metadata - consultations
There is no data available on number of consultations within a statistical domain for a given time period.
At the end of every survey (i.e. on annual level, if not determined otherwise), annual quality report (which is in many points simmilar to this, provided by Eurostat) is prepared. Quality guidelines are closely followed by all staff. Training courses, use of best practices (from other institutions, both domestic and foreign), self-assesments and other necessary processes are also a part of quality assurance framework within the unit and institution.
11.2. Quality management - assessment
The current statistical outputs are estimated as optimal. Data collecting, processing and the dissemination process are verified. No quality improvements are planned in the near future.
12.1. Relevance - User Needs
Data are freely available to general public. Users are researchers, students, governmental and non-governmental institutions, companies etc.
12.2. Relevance - User Satisfaction
User satisfaction surveys are being carried out on an institutional level and not for certain survey (e.g. energy prices). Users can however directly contact the statistitian responsible for the survey (e-mail address and phone number are provided in SiStat database portal), but this is mostly used for data inquries.
12.3. Completeness
The completeness according to relevant regulations/guideliness is 100%.
12.3.1. Data completeness - rate
The ratio of the number of data cells provided to the number of data cells required is 100%.
13.1. Accuracy - overall
Data are collected from administrative database (EPOS databse operated by Energy Directorate, Ministry of Infrastructure). If the reports collected from the reporting units (i.e. gas distributors) include errors, they are warned by SURS and asked to revise the data and apply corrections.
13.2. Sampling error
There is no sampling error, since the coverage is 100%.
13.2.1. Sampling error - indicators
There is no sampling error, since the coverage is 100%.
13.3. Non-sampling error
Information is included in the sub-concepts S.13.3.1-S.13.3.5.
13.3.1. Coverage error
Not applicable since the coverage is 100%
13.3.1.1. Over-coverage - rate
Slovenia is not aware of any over-coverage error.
13.3.1.2. Common units - proportion
Data are collected from administrative database (EPOS), where reporting units report the data - Natural Gas and Electricity prices survey. The coverage is 100%.
13.3.2. Measurement error
The coverage is 100%. Data are collected from administrative source and are checked for possible deviations.
13.3.3. Non response error
Not applicable since the coverage is 100%.
13.3.3.1. Unit non-response - rate
All natural gas suppliers and network distributors provided all the data, the non-response rate is 0%.
13.3.3.2. Item non-response - rate
0 of suppliers and 0 distributors representing 0% of the target population did not provide information on gas prices.
13.3.4. Processing error
The process is continuous. Data are checked once they are tabulated for possible deviations. 0 processing errors were identified as of now.
13.3.5. Model assumption error
Not Applicable.
14.1. Timeliness
Natural gas providers that participate in the national data collection are requested to provide the natural gas price data within 1 month after the reference period. After arrival, the statistical office checks the aggregated data for correctness, consistency and completeness and national averages are calculated and reported to Eurostat during the third month after the reference period.
14.1.1. Time lag - first result
The first version of the natural gas price questionnaire for households for the 1st semester of 2022 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for households for the 2nd semester of 2022 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for households for the 1st semester of 2023 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for households for the 2nd semester of 2023 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for households for the 1st semester of 2024 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for households for the 2nd semester of 2024 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for non-households for the 1st semester of 2022 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for non-households for the 2nd semester of 2022 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for non-households for the 1st semester of 2023 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for non-households for the 2nd semester of 2023 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for non-households for the 1st semester of 2024 was sent 0 days after the legal deadline.
The first version of the natural gas price questionnaire for non-households for the 2nd semester of 2024 was sent 0 days after the legal deadline.
14.1.2. Time lag - final result
Fisrt results are equal to final results, as no revisions are planned.
14.2. Punctuality
The legal deadline for submitting the questionnaires is the third month after the reference period.
14.2.1. Punctuality - delivery and publication
All data were delivered and published on time.
15.1. Comparability - geographical
Reported data cover whole country (Slovenia). The methodological process is fully aligned with international requirements (European regulations and standards), therefore the data are fully comparable on international level.
15.1.1. Asymmetry for mirror flow statistics - coefficient
Not applicable
15.2. Comparability - over time
There have been no changes.
15.2.1. Length of comparable time series
Half-yearly data, (time series since 2nd semester of 2007) reported to Eurostat are fully comparable and have no breaks in time series. No changes were made in the underlying statistical process in that period of time.
15.3. Coherence - cross domain
Not applicable
15.3.1. Coherence - sub annual and annual statistics
Not applicable
15.3.2. Coherence - National Accounts
Not applicable
15.4. Coherence - internal
Annual prices are coherent with the semestrial prices.
Data from the natural gas distributors are being collected (not directly for statistical purposes) in the EPOS administrative databse, which is operated by Energy Directorate, Ministry of Infrastructure. Since the data are collected for administrative purpose, there is no direct or additional burden on respondents to report for the statistical purposes. There is no additonal cost of data collection for SURS.
Data for natural gas prices are being processed, disseminated and reported by 1 statistitician. 0,1 full time equivalents for the production of natural gas prices are being used (estimation).
17.1. Data revision - policy
Data on natural gas prices are published as final (publication is T+65 days after the reference period). Revisions are not planned.
Data source is administrative database (EPOS database, operated by Energy Directorate, Ministry of Infrastructure). Data are being obtained (extracted) from database by SURS.
18.2. Frequency of data collection
Data are being reported and collected on quarterly level. Reportings and direct access to the database is based on mutual agreement with administrative database operator (Energy Directorate, Ministry of Infrastructure): data on natural gas prices are extracted from the database, processed and reported to the Energy Directorate, Ministry of Infrastructure by SURS.
18.3. Data collection
Data are being collected in administrative database (online form). SURS obtains the data directly from administratuive database.
Questionnaire form is attached (available only in Slovene).
Data are being checked by statistician on SURS, responsible for this survey, who visually checks the data and compares it with data from previous reporting cycles. If data are incomplete, statistician contacts a reporting unit with a request for clarification and asks the reporting unit to resend the correct data.
18.5. Data compilation
Data are based on administrative source. The coverage is 100%. No special data compilation process is needed (i.e. weightening, imputation, adjustment for non-response, calibration etc.).
18.5.1. Imputation - rate
Not applicable.
18.6. Adjustment
Not applicable.
18.6.1. Seasonal adjustment
Seasonal adjustments are not carried out.
European statistics on natural gas prices for household and final non-household customers.
30 June 2025
The prices are collected in national currencies per GJ and according to different bands of consumption.
For the households sector, these bands are:
D1: Customers consuming less than 20 GJ.
D2: Customers consuming 20 GJ or more but less than 200 GJ.
D3: Customers consuming 200 GJ or more.
For the final non-households sector, the bands are:
I1: Customers consuming less than 1000 GJ.
I2: Customers consuming 1000 GJ or more but less than 10000 GJ.
I3: Customers consuming 10000 GJ or more but less than 100000 GJ.
I4: Customers consuming 100000 GJ or more but less than 1000000 GJ.
I5: Customers consuming 1000000 GJ or more but less than 4000000 GJ.
I6: Customers consuming 4000000 GJ or more.
There exist 2 different levels of disagregation for semestrial and annual prices:
1- Semestrial prices:
These prices are reported twice a year and are divided in 3 levels:
Level 1 prices: Prices excluding taxes and levies.
Level 2 prices: Prices excluding VAT and other recoverable taxes and levies.
Level 3 prices: Prices including all taxes and levies.
2- Annual prices:
These prices are reported once a year together with the data for the second semester and are divided into the following components and taxes:
Energy and supply: commodity price for natural gas paid by the supplier or the price of natural gas at the point of entry into the transmission system, including, if applicable, the following end-user costs: storage costs plus costs relating to the sale of natural gas to final customers.
Network cost: transmission and distribution tariffs, transmission and distribution losses, network costs, after-sale service costs, system service costs and meter rental and metering costs.
Value added taxes (VAT): as defined in Council Directive 2006/112/EC.
Renewable taxes: taxes, fees, levies or charges relating to the promotion of renewable energy sources, energy efficiency and CHP generation.
Capacity taxes: taxes, fees, levies or charges relating to strategic stockpiles, capacity payments and energy security; taxes on natural gas distribution; stranded costs and levies on financing energy regulatory authorities or market and system operators.
Environmental taxes: taxes, fees, levies or charges relating to air quality and for other environmental purposes; taxes on emissions of CO2 or other greenhouse gases. This component includes the excise duties.
All other taxes: taxes, fees, levies or charges not covered by any of the previous four categories: support for district heating; local or regional fiscal charges; island compensation; concession fees relating to licences and fees for the occupation of land and public or private property by networks or other devices.
In addition to these elements, the network cost is split into the respective shares of transmission and distribution. The relative share of consumption in the different consumption bands is reported by the countries and used to calculated the single national natural gas prices (weighted averages for consumer bands IA-IF and DA-DE) but not published because it could be used to re-calculate some confidential values.
Some of the taxes are refundable. Here is a description of them:
Household and final non-household consumers divided into consumption bands.
Household customers: Data coming from 17 suppliers out of 17 and representing 100% of the household customers. Households network costs data are collected by 11 distributors.
Non-household customers: Data coming from 17 suppliers out of 17 and representing 100% of the final non-household customers. Non-household etwork costs data are collected by 12 distributors.
Whole country (Slovenia).
For semestrial prices, the reference periods are from January to June for semester 1 and from July to December for semester 2.
For annual prices, the reference period is the whole calendar year (from January to December).
Data are collected from administrative database (EPOS databse operated by Energy Directorate, Ministry of Infrastructure). If the reports collected from the reporting units (i.e. gas distributors) include errors, they are warned by SURS and asked to revise the data and apply corrections.
Prices are reported to Eurostat in national currency per GJ. However, Eurostat also calculates and publishes the prices in EURO and PPS (purchasing power parity) and do the conversion to kWh. Relative shares of sub-component of the network component and consumption volumes are reported in percentages.
Data are based on administrative source. The coverage is 100%. No special data compilation process is needed (i.e. weightening, imputation, adjustment for non-response, calibration etc.).
Data source is administrative database (EPOS database, operated by Energy Directorate, Ministry of Infrastructure). Data are being obtained (extracted) from database by SURS.
Natural gas prices in Slovenia are published on a semestrial basis on Eurostat's website.
Natural gas providers that participate in the national data collection are requested to provide the natural gas price data within 1 month after the reference period. After arrival, the statistical office checks the aggregated data for correctness, consistency and completeness and national averages are calculated and reported to Eurostat during the third month after the reference period.
Reported data cover whole country (Slovenia). The methodological process is fully aligned with international requirements (European regulations and standards), therefore the data are fully comparable on international level.
