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.
Economic Statistics Department / External Economy Statistics Unit
1.3. Contact name
Confidential because of GDPR
1.4. Contact person function
Confidential because of GDPR
1.5. Contact mail address
Av. António José de Almeida, 1000-043 Lisboa
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
31 July 2024
2.2. Metadata last posted
31 July 2024
2.3. Metadata last update
28 May 2025
3.1. Data description
International trade in goods statistics (ITGS) published by Eurostat measure the value and quantity of goods traded between the EU Member States (intra-EU trade) and goods traded by the EU Member States with non-EU countries (extra-EU trade). ‘Goods’ means all movable property including electricity. ‘European’ means that the statistics are compiled on the basis of the concepts and definitions set out in EU legislation.
Trade by invoicing currency (TIC) data are part of the information available for extra-EU trade. The invoicing currency is the currency in which the commercial invoice is drawn up. Data by invoicing currency can be used for instance to explore the use of the euro in the EU’s international trade, to compare it with the role of the United States dollar (USD) or to analyse the role of the euro in the euro area and in the EU. These statistics are very useful to central banks, including the European Central Bank, for comparing the euro with other major international currencies. These data are also used by financial market segments or foreign investors.
Statistical dimensions available for TIC data:
reporting country;
partner country;
reference period;
trade flows;
product; and
currency.
3.2. Classification system
Product classification
The Standard International Trade Classification (SITC) is managed by the United Nations and correlated with the subheadings of the Harmonised System. SITC Rev. 4 comprises 2 970 basing headings which are aggregated into 262 groups, 67 divisions and 10 sections. TIC data are based on the section level complemented by the division 33 ‘oil”.
Country classification
The ‘Nomenclature of countries and territories for the external trade statistics of the Union and statistics of trade between Member States’, known as the ‘Geonomenclature’, is used to collect detailed statistics on exchanges of goods. TIC data are only disseminated at an aggregated partner level: partner ‘extra-EU’ for TIC data reported by the EU Member States and partner ‘world’ for the TIC data reported by the EFTA and enlargement countries. See the publication Geonomenclature applicable to European statistics on international trade in goods for more information (publications).
3.3. Coverage - sector
The scope of TIC data is the same as for monthly detailed data on extra-EU trade in goods. They cover all goods entering (imports) or leaving (exports) the national statistical territory and for which the trading partner is a non-EU country. Note that the statistical territory of Portugal corresponds to its customs territory.
As ITGS in general, TIC data cover all sectors of the economy.
3.4. Statistical concepts and definitions
Reporting country – Except for some specific goods like vessels and aircraft, ITGS follow the physical movements of the goods. A country should record an import when goods enter its statistical territory and an export when goods leave that territory except if those goods are in simple transit.
Partner country – At detailed level, this is the last known country of destination for exports and the country of origin for imports. However individual partner countries are not kept in the dissemination of data by invoicing currency. They are replaced by the partner area ‘extra-EU’.
Product – Goods are primarily classified by commodity code as set out in the EU Combined Nomenclature. TIC data are compiled on the basis of a correspondence table enabling the transposition of detailed data collected according to the Combined Nomenclature into the Standard International Trade Classification (SITC). TIC data are available by three product groups: Raw materials without oil (SITC sections 0-4, excluding division 33), Oil (SITC division 33) and Manufactured products (SITC sections 5-8) and commodities and transactions not classified elsewhere (SITC9). Additionally, since 2022 reference period (voluntarily since 2021), TIC data are available also by 10 individual SITC sections.
Currency – The invoicing currency is the currency in which the commercial invoice is drawn up. Its definition is provided by the customs legislation. Only the following currencies or groups of invoicing currencies are considered for data transmission to Eurostat:
Common currencies to be reported whatever the data source used:
Euro (‘EUR’)
National currency of the reporting country
UK pound sterling (‘GBP’)
US dollar (‘USD’)
National currencies of non-euro area Member States (‘XU3’)
Other not specified currencies (‘_X’)
Unknown currency (‘_U’)
Total ‘_T’
Additional invoicing currency breakdown if the data source is the customs declaration:
Brazilian real (‘BRL’)
Canadian dollar (‘CAD’)
Swiss franc (‘CHF’)
Chinese yuan renminbi (‘CNY’)
Indian rupee (‘INR’)
Japanese yen (‘JPY’)
South Korean won (‘KRW’)
Mexican peso (‘MXN’)
Norwegian krone (‘NOK’)
Russian rouble (‘RUB’)
Singapore dollar (‘SGD’)
Turkish lira ("TRY")
Note on ‘unknown’ currency: Trade for which the currency is unknown should be distributed over the individual currencies or groups of currencies proportionally to their relative share except if it is known that such a distribution would skew the data in a too significant extent. In such a case, the code UNK ‘Unknown’ could exceptionally be used.
The set of collected currencies has been evolving over time. Initially, only 5 currencies were collected (EUR, USD, _X, XU3 and _T). Since 2020 reference year, _U currency was added. The full set mentioned above has been collected only since 2022 reference year (voluntarily since 2021).
3.5. Statistical unit
The statistical unit is any natural or legal person lodging a customs declaration in Portugal on the condition that the customs procedure is of statistical relevance.
3.6. Statistical population
The statistical population comprises all the legal or natural persons who have lodged a customs declaration with the Portuguese National Customs Authority within the year.
For data transmission to Eurostat – Trade values (in national currency units) by invoicing currency. The value of traded goods is calculated at the national frontier, on a FOB (free on board) basis for exports and a CIF (cost, insurance, freight) basis for imports. Hence, only incidental expenses (freight, insurance) are included and they are incurred for:
exports in the part of the journey located on the territory of the country where the goods are exported from;
imports in the part of the journey located outside the territory of the country where the goods are imported to.
For data dissemination on Eurostat website – Share of each invoicing currency in extra-EU imports and exports.
Theoretically, the reference period for the information on international trade in goods transactions should be the calendar month of export or import of the goods. However, in practice the reference period is generally the calendar month during which the customs declaration is accepted by the Portuguese National Customs Authority.
The reference years for which TIC data are disseminated result from the aggregation of monthly figures from January to December.
6.1. Institutional Mandate - legal acts and other agreements
General statistical legislation
Regulation (EC) No 223/2009 of the European Parliament and of the Council on European statistics
Extra-EU trade legislation (or Extrastat)
Regulation (EC) No 471/2009 of the European Parliament and of the Council;
Implementing Commission Regulation (EC) No 92/2010;
Implementing Commission Regulation (EC) No 113/2010;
All regulations relevant for the European statistics on international trade in goods can be found in the publication Legislation on European statistics on international trade in goods or consulted from the Legislation page of the International trade in goods section on Eurostat website. All legal texts of the EU are accessible on Eur-Lex.
6.2. Institutional Mandate - data sharing
Not applicable.
7.1. Confidentiality - policy
Regulation (EC) No 223/2009 on European statistics (recital 24 and Article 20(4)) of 11 March 2009 (OJ L 87, p. 164), stipulates the need to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and the access to those confidential data with due account for technical developments and the requirements of users in a democratic society.
Regulation (EU) 2019/2152 on European business statistics (Article 19), of 27 November 2019 (OJ L 327, p. 18) determines that only upon request of an importer or exporter of goods, the NSA shall decide whether to disseminate statistical results relating to the respective imports or exports without any amendment or, following a reasoned request by that importer or exporter, to amend the statistical results so as to make it impossible to identify that importer or exporter in order to comply with the principle of statistical confidentiality, in accordance with point (a) of Article 20(3) of Regulation (EC) No 223/2009.
As a general definition, data used by national and EU authorities for producing statistics are considered confidential if statistical units can be identified, either directly or indirectly, and information about individuals or businesses is disclosed as a result.
For TIC data, the principle of active confidentiality applies, which means that the National Statistical Authorities (NSAs) take the initiative to identify the data whose dissemination by Eurostat would make it possible to identify an enterprise or a trader. The identification of an enterprise or a trader is possible only if a specific value corresponds to data from less than 3 enterprises or traders.
Taking into account the agregated level of dissemination of TIC data (SITC-1 digit code), usually there is no confidential records to be suppressed.
7.2. Confidentiality - data treatment
Specific TIC data for Portugal results from the aggregation of real trade data (i.e. data as collected in SADs), given that there are no traders or enterprises requesting for confidentialty in International Trade in Goods Statistics since 2005, with the application of the passive confidentiality in ITGS data, according to specific European legislation.
Data by invoicing currency are not detailed enough to make it possible to identify a specific trader. Therefore no specific data treatment applies.
8.1. Release calendar
TIC data are only disseminated by Eurostat. See item 8.1 ‘Release calendar’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency (TIC)’ for more details.
8.2. Release calendar access
TIC data are only disseminated by Eurostat. See item 8.2 ‘Release calendar access’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
8.3. Release policy - user access
TIC data are only disseminated by Eurostat. See item 8.3 ‘Release policy - user access’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
TIC data are only disseminated by Eurostat. See item 9 ‘Frequency of dissemination’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
10.1. Dissemination format - News release
TIC data are only disseminated by Eurostat. See item 10.1 ‘Dissemination format - News release’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
10.2. Dissemination format - Publications
TIC data are only disseminated by Eurostat. See item 10.2 ‘Dissemination format - Publications’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
10.3. Dissemination format - online database
TIC data are only disseminated by Eurostat. See item 10.3 ‘Dissemination format - online database’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
TIC data are only disseminated by Eurostat. See item 10.6 ‘Documentation on methodology' of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
10.6.1. Metadata completeness - rate
100%
10.7. Quality management - documentation
TIC data are only disseminated by Eurostat. See item 10.7 ‘Quality management - documentation’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
11.1. Quality assurance
The compilation of extra-EU trade data is subject to several validation rules and quality control processes, including the analysis of country codes and invoicing currency. Thus, the quality of TIC data is guaranteed with the quality of base information at the most detailed (each transaction) level.
11.2. Quality management - assessment
See item 11.2 ‘Quality management - assessment' of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
12.1. Relevance - User Needs
TIC data are only disseminated by Eurostat. See item 12.1 ‘Relevance - User Needs’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
12.2. Relevance - User Satisfaction
TIC data are only disseminated by Eurostat. See item 12.2 ‘Relevance - User Satisfaction’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
12.3. Completeness
See item 12.3 ‘Completeness’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
See item 15.1 ‘Comparability - geographical' of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
15.1.1. Asymmetry for mirror flow statistics - coefficient
Not applicable.
15.2. Comparability - over time
The information is comparable over time, since the first year available, given the consistency and continuity of the collection and compilation procedures.
15.2.1. Length of comparable time series
All the available TIC time series is comparable over time.
15.3. Coherence - cross domain
See item 15.3 ‘Coherence - cross domain' of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
15.3.1. Coherence - sub annual and annual statistics
Not applicable.
15.3.2. Coherence - National Accounts
Not applicable.
15.4. Coherence - internal
See item 15.4 ‘Coherence - internal' of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
TIC data are derived from information collected via customs declarations. No specific data collection is then necessary, which means that the burden is null for the respondents, i.e. for the traders and businesses. The cost of TIC data only relates to the compilation step carried out by the National Statistical Authorities, which is considered as minor given the small number of records.
17.1. Data revision - policy
Data is not disseminated at national level, so there is no formal revisions policy.
17.2. Data revision - practice
Statistics by invoicing currency are only exceptionally revised.
17.2.1. Data revision - average size
Not available.
18.1. Source data
TIC data are derived from:
Trade in goods transactions collected via customs declarations;
18.2. Frequency of data collection
Collection of trade in goods data: every month via customs declarations
18.3. Data collection
Collection of trade in goods data
The standard source of information on trade transactions is the customs declaration submitted by businesses and, in some cases, by private individuals involved in an international transaction of goods with a non-EU country. The customs declaration may be in paper form — the Single Administrative Document (SAD) — but is most commonly in electronic format.
Collection of the invoicing currency
The invoicing currency is the currency in which the commercial invoice is drawn up. It is mandatory information to be collected by the Customs National Authorities for imported goods. On exports, this data element is optional; therefore the Customs National Authority may decide not to collect the invoicing currency. In this case, the National Statistical Authority responsible for providing Eurostat with TIC data has to collect the information via a survey.
18.4. Data validation
Portuguese TIC data disseminated by Eurostat have passed the following quality checks:
Intra-dataset checks: completeness of the dataset and uniqueness of the records, validity of the codes, validity of code combinations across the different dimensions, inter-record consistency checks;
Intra-domain check: check of the coherence between trade values published in the TIC dataset and trade values coming from aggregated and detailed trade in goods data.
18.5. Data compilation
At national level:
The TIC data is compiled based on the Extra-EU detailed data, from the SAD records transmitted by the Portuguese National Customs Authority. In case the invoicing currency is missing in the original SAD data, the invoice “euro” is considered for the TIC compilation.
At European level:
The share of each invoicing currency in the imports and exports of Portugal is calculated on the basis of the transmitted trade values.
18.5.1. Imputation - rate
At national level:
No imputation is made.
At European level:
No imputation is made by Eurostat.
18.6. Adjustment
Not applicable.
18.6.1. Seasonal adjustment
Not applicable.
No commets.
International trade in goods statistics (ITGS) published by Eurostat measure the value and quantity of goods traded between the EU Member States (intra-EU trade) and goods traded by the EU Member States with non-EU countries (extra-EU trade). ‘Goods’ means all movable property including electricity. ‘European’ means that the statistics are compiled on the basis of the concepts and definitions set out in EU legislation.
Trade by invoicing currency (TIC) data are part of the information available for extra-EU trade. The invoicing currency is the currency in which the commercial invoice is drawn up. Data by invoicing currency can be used for instance to explore the use of the euro in the EU’s international trade, to compare it with the role of the United States dollar (USD) or to analyse the role of the euro in the euro area and in the EU. These statistics are very useful to central banks, including the European Central Bank, for comparing the euro with other major international currencies. These data are also used by financial market segments or foreign investors.
Statistical dimensions available for TIC data:
reporting country;
partner country;
reference period;
trade flows;
product; and
currency.
28 May 2025
Reporting country – Except for some specific goods like vessels and aircraft, ITGS follow the physical movements of the goods. A country should record an import when goods enter its statistical territory and an export when goods leave that territory except if those goods are in simple transit.
Partner country – At detailed level, this is the last known country of destination for exports and the country of origin for imports. However individual partner countries are not kept in the dissemination of data by invoicing currency. They are replaced by the partner area ‘extra-EU’.
Product – Goods are primarily classified by commodity code as set out in the EU Combined Nomenclature. TIC data are compiled on the basis of a correspondence table enabling the transposition of detailed data collected according to the Combined Nomenclature into the Standard International Trade Classification (SITC). TIC data are available by three product groups: Raw materials without oil (SITC sections 0-4, excluding division 33), Oil (SITC division 33) and Manufactured products (SITC sections 5-8) and commodities and transactions not classified elsewhere (SITC9). Additionally, since 2022 reference period (voluntarily since 2021), TIC data are available also by 10 individual SITC sections.
Currency – The invoicing currency is the currency in which the commercial invoice is drawn up. Its definition is provided by the customs legislation. Only the following currencies or groups of invoicing currencies are considered for data transmission to Eurostat:
Common currencies to be reported whatever the data source used:
Euro (‘EUR’)
National currency of the reporting country
UK pound sterling (‘GBP’)
US dollar (‘USD’)
National currencies of non-euro area Member States (‘XU3’)
Other not specified currencies (‘_X’)
Unknown currency (‘_U’)
Total ‘_T’
Additional invoicing currency breakdown if the data source is the customs declaration:
Brazilian real (‘BRL’)
Canadian dollar (‘CAD’)
Swiss franc (‘CHF’)
Chinese yuan renminbi (‘CNY’)
Indian rupee (‘INR’)
Japanese yen (‘JPY’)
South Korean won (‘KRW’)
Mexican peso (‘MXN’)
Norwegian krone (‘NOK’)
Russian rouble (‘RUB’)
Singapore dollar (‘SGD’)
Turkish lira ("TRY")
Note on ‘unknown’ currency: Trade for which the currency is unknown should be distributed over the individual currencies or groups of currencies proportionally to their relative share except if it is known that such a distribution would skew the data in a too significant extent. In such a case, the code UNK ‘Unknown’ could exceptionally be used.
The set of collected currencies has been evolving over time. Initially, only 5 currencies were collected (EUR, USD, _X, XU3 and _T). Since 2020 reference year, _U currency was added. The full set mentioned above has been collected only since 2022 reference year (voluntarily since 2021).
The statistical unit is any natural or legal person lodging a customs declaration in Portugal on the condition that the customs procedure is of statistical relevance.
The statistical population comprises all the legal or natural persons who have lodged a customs declaration with the Portuguese National Customs Authority within the year.
Portugal
Theoretically, the reference period for the information on international trade in goods transactions should be the calendar month of export or import of the goods. However, in practice the reference period is generally the calendar month during which the customs declaration is accepted by the Portuguese National Customs Authority.
The reference years for which TIC data are disseminated result from the aggregation of monthly figures from January to December.
See item 13.1 ‘Accuracy - overall' of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
For data transmission to Eurostat – Trade values (in national currency units) by invoicing currency. The value of traded goods is calculated at the national frontier, on a FOB (free on board) basis for exports and a CIF (cost, insurance, freight) basis for imports. Hence, only incidental expenses (freight, insurance) are included and they are incurred for:
exports in the part of the journey located on the territory of the country where the goods are exported from;
imports in the part of the journey located outside the territory of the country where the goods are imported to.
For data dissemination on Eurostat website – Share of each invoicing currency in extra-EU imports and exports.
At national level:
The TIC data is compiled based on the Extra-EU detailed data, from the SAD records transmitted by the Portuguese National Customs Authority. In case the invoicing currency is missing in the original SAD data, the invoice “euro” is considered for the TIC compilation.
At European level:
The share of each invoicing currency in the imports and exports of Portugal is calculated on the basis of the transmitted trade values.
TIC data are derived from:
Trade in goods transactions collected via customs declarations;
TIC data are only disseminated by Eurostat. See item 9 ‘Frequency of dissemination’ of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
See concepts 14.1.1 and 14.1.2.
See item 15.1 ‘Comparability - geographical' of the related metadata ‘ext_tic - International trade in goods – trade by invoicing currency’ for more details.
The information is comparable over time, since the first year available, given the consistency and continuity of the collection and compilation procedures.
