Centre de politique et d'administration fiscales

New report compares performance, best practices and trends in 56 tax administrations


11/08/2015 - Tax administrations continue to face the challenges of improving their performance while reducing costs, decreasing compliance burdens for taxpayers tackling non-compliance. Improving taxpayer services, while making non-compliance harder, is helping revenue bodies increase their efficiency and allowing governments to finance important programmes that will further benefit their citizens.


Tax Administration 2015 is the sixth edition of the OECD’s comparative information series on tax administration. The report, which surveys 56 advanced and emerging economies (including all OECD, EU, and G20 countries), includes for the first time information: Costa Rica, Croatia, Morocco and Thailand. The series identifies fundamental elements of modern tax administration systems and uses data, analyses and examples to identify key performance trends, recent innovations, and examples of good practice.


Among the many findings and observations, the report in particular highlights:

  • Significant organisational change – 40% of revenue bodies reported that they are currently managing the addition of new business activities, amalgamation with other government service providers, and consolidation of work and their office network, at a time when 60% saw reductions in staffing, with significant reductions in Australia, the United Kingdom and the United States.

  • Strong investment in digital services – driven by customer expectation and productivity demands revenue administrations have invested significantly in digital on-the-go services. Average IT expenditure as a percentage of the total budget remained constant at 9.5%. Notable exceptions were Austria, Finland, Singapore and Norway where approximately 25% of the total budget is spent on IT.

  • Better connected e-services, and future opportunity – while 95% of all revenue bodies offer the opportunity to file returns electronically, and over two thirds achieve usage over 75%, more could be done to move other aspects of the end-to-end process, including assessment, amendment and payment into a more integrated digital service.

  • Improving outstanding tax debt position1– Total tax debt for OECD member countries rose marginally in 2011 to 2013, from around 22% to just over 24% of net annual revenue collections. This ratio is however significantly impacted by two abnormal “outliers” which when removed change the results for OECD countries to show a decrease from 12.7% in 2011 to 11.1% of annual net revenue collections in 2013.  Notably seven revenue bodies: Estonia, Ireland, Japan, Korea, Norway, Sweden and Switzerland have a collection to debt ratio of less than 5%. Improvements in collection performance can generally be attributed to:
    • Strong management information systems;
    • Well-developed analytics tools to guide use of extensive enforcement powers;
    • Extensive use of tax withholding at source arrangements;
    • Wide use of electronic payment methods; and
    • Significant investment in information technology.

  • Improving management of large taxpayers – over 85% of revenue bodies have adopted the structured ‘co-operative compliance model’ recommended by the OECD, for managing their largest taxpayers. One-third use similar arrangements to manage the tax affairs of High Net Worth Individuals.

  • Tax gap2 measurement on the increase – 43% of revenue bodies report they undertake or are researching estimates of the aggregate tax gap for some or all of the major taxes administered.

  • Greater use of disclosure policies to improve tax compliance and bolster tax revenues3 – despite two-thirds of OECD member countries reporting that their tax law permits voluntary disclosures only 40% have a policy to encourage taxpayers to use these. Further only 11 member countries were able to report the results achieved from their voluntary disclosure programme. With the imminent implementation of automatic exchange of financial account information, it is expected that there will be greater interest in these programmes. See the recent report Update on Voluntary Disclosure Programmes: A Pathway to Tax Compliance.

  • Electronic matching of VAT invoices continues to expand – with growing concerns about the VAT non-compliance, a relatively large number of revenue bodies, including many in Europe and Latin America, are successfully  using systems to process bulk VAT invoice data for compliance risk management and fraud detection.


For more information, download our flyer or visit our tax administration database.


Journalists should contact Grace Perez-Navarro, Deputy Director of the OECD's Centre for Tax Policy and Administration (CTPA) on +33 1 45 24 18 80 or Achim Pross, Head of the CTPA International Co-operation and Tax Administration Division.

1 Outstanding tax debts are defined as the total amount of tax (including any interest and penalties) that is overdue for payment at the end of each fiscal period.

2 The tax gap refers to the estimate between the tax that should be assessed and what is assessed.

3 In general terms, voluntary disclosure programmes are opportunities offered by revenue bodies to taxpayers to correct their tax affairs under specified terms.


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