The second possibility, the “deductive” approach, starts with a wide set of companies that operate in the same sector of activity, perform similar broad functions and do not present economic characteristics that are obviously different. The list is then refined using selection criteria and publicly available information (e.g. from databases, Internet sites, information on known competitors of the taxpayer). In practice, the “deductive” approach typically starts with a search on a database. It is therefore important to follow the guidance on internal comparables and on the sources of information on external comparables, see paragraphs 3.24-3.39. In addition, the “deductive” approach is not appropriate to all cases and all methods and the discussion in this section should not be interpreted as affecting the criteria for selecting a transfer pricing method set out in paragraphs 2.1-2.12 ...

There are also proprietary databases that are developed and maintained by some advisory firms. In addition to the issues raised above for commercial databases that are more broadly commercialised, proprietary databases also raise a further concern with respect to their coverage of data if they are based on a more limited portion of the market than commercial databases. When a taxpayer has used a proprietary database to support its transfer prices, the tax administration may request access to the database to review the taxpayer’s results, for obvious transparency reasons ...

Use of commercial databases should not encourage quantity over quality. In practice, performing a comparability analysis using a commercial database alone may give rise to concerns about the reliability of the analysis, given the quality of the information relevant to assessing comparability that is typically obtainable from a database. To address these concerns, database searches may need to be refined with other publicly available information, depending on the facts and circumstances. Such a refinement of the database search with other sources of information is meant to promote quality over standardised approaches and is valid both for database searches made by taxpayers/practitioners and for those made by tax administrations. It should be understood in light of the discussion of the costs and compliance burden created for the taxpayer at paragraphs 3.80-3.83 ...

It may be unnecessary to use a commercial database if reliable information is available from other sources, e.g. internal comparables. Where they are used, commercial databases should be used in an objective manner and genuine attempts should be made to use the databases to identify reliable comparable information ...

A number of limitations to commercial databases are frequently identified. Because these commercial databases rely on publicly available information, they are not available in all countries, since not all countries have the same amount of publicly available information about their companies. Moreover, where they are available, they do not include the same type of information for all the companies operating in a given country because disclosure and filing requirements may differ depending on the legal form of the company and on whether or not it is listed. Care must be exercised with respect to whether and how these databases are used, given that they are compiled and presented for non-transfer pricing purposes. It is not always the case that commercial databases provide information that is detailed enough to support the chosen transfer pricing method. Not all databases include the same level of detail and can be used with similar assurance. Importantly, it is the experience in many countries that commercial databases are used to compare the results of companies rather than of transactions because third party transactional information is rarely available. See paragraph 3.37 for a discussion of the use of non-transactional third party data ...

A common source of information is commercial databases, which have been developed by editors who compile accounts filed by companies with the relevant administrative bodies and present them in an electronic format suitable for searches and statistical analysis. They can be a practical and sometimes cost-effective way of identifying external comparables and may provide the most reliable source of information, depending on the facts and circumstances of the case ...

There are various sources of information that can be used to identify potential external comparables. This sub-section discusses particular issues that arise with respect to commercial databases, foreign comparables and information undisclosed to taxpayers. Additionally, whenever reliable internal comparables exist, it may be unnecessary to search for external ones, see paragraphs 3.27-3.28 ...

The second possibility, the “deductive” approach, starts with a wide set of companies that operate in the same sector of activity, perform similar broad functions and do not present economic characteristics that are obviously different. The list is then refined using selection criteria and publicly available information (e.g. from databases, Internet sites, information on known competitors of the taxpayer). In practice, the “deductive” approach typically starts with a search on a database. It is therefore important to follow the guidance on internal comparables and on the sources of information on external comparables, see paragraphs 3.24-3.39. In addition, the “deductive” approach is not appropriate to all cases and all methods and the discussion in this section should not be interpreted as affecting the criteria for selecting a transfer pricing method set out in paragraphs 2.1-2.12 ...

There are also proprietary databases that are developed and maintained by some advisory firms. In addition to the issues raised above for commercial databases that are more broadly commercialised, proprietary databases also raise a further concern with respect to their coverage of data if they are based on a more limited portion of the market than commercial databases. When a taxpayer has used a proprietary database to support its transfer prices, the tax administration may request access to the database to review the taxpayer’s results, for obvious transparency reasons ...

Use of commercial databases should not encourage quantity over quality. In practice, performing a comparability analysis using a commercial database alone may give rise to concerns about the reliability of the analysis, given the quality of the information relevant to assessing comparability that is typically obtainable from a database. To address these concerns, database searches may need to be refined with other publicly available information, depending on the facts and circumstances. Such a refinement of the database search with other sources of information is meant to promote quality over standardised approaches and is valid both for database searches made by taxpayers/practitioners and for those made by tax administrations. It should be understood in light of the discussion of the costs and compliance burden created for the taxpayer at paragraphs 3.80-3.83 ...

It may be unnecessary to use a commercial database if reliable information is available from other sources, e.g. internal comparables. Where they are used, commercial databases should be used in an objective manner and genuine attempts should be made to use the databases to identify reliable comparable information ...

A number of limitations to commercial databases are frequently identified. Because these commercial databases rely on publicly available information, they are not available in all countries, since not all countries have the same amount of publicly available information about their companies. Moreover, where they are available, they do not include the same type of information for all the companies operating in a given country because disclosure and filing requirements may differ depending on the legal form of the company and on whether or not it is listed. Care must be exercised with respect to whether and how these databases are used, given that they are compiled and presented for non-transfer pricing purposes. It is not always the case that commercial databases provide information that is detailed enough to support the chosen transfer pricing method. Not all databases include the same level of detail and can be used with similar assurance. Importantly, it is the experience in many countries that commercial databases are used to compare the results of companies rather than of transactions because third party transactional information is rarely available. See paragraph 3.37 for a discussion of the use of non-transactional third party data ...

A common source of information is commercial databases, which have been developed by editors who compile accounts filed by companies with the relevant administrative bodies and present them in an electronic format suitable for searches and statistical analysis. They can be a practical and sometimes cost-effective way of identifying external comparables and may provide the most reliable source of information, depending on the facts and circumstances of the case ...

There are various sources of information that can be used to identify potential external comparables. This sub-section discusses particular issues that arise with respect to commercial databases, foreign comparables and information undisclosed to taxpayers. Additionally, whenever reliable internal comparables exist, it may be unnecessary to search for external ones, see paragraphs 3.27-3.28 ...