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This annual publication provides information on tax levels and tax structures in OECD countries. It was prepared under the auspices of the Working Party on Tax Policy Analysis and Tax Statistics of the Committee on Fiscal Affairs and is published under the responsibility of the Secretary-General of the OECD.
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In 2018, the average OECD tax-to-GDP ratio remained virtually unchanged compared to 2017, with almost no increase (a change of 0.02 percentage points). This ends the trend of annual increases in the OECD average tax-to-GDP ratio observed since 2009, following the financial crisis. The slowing in the growth of the OECD average was predominantly driven by the impact of the significant fall in the tax-to-GDP ratio of the United States as a result of their tax reforms. However, due to rounding the OECD average tax-to-GDP ratio was 34.3% in 2018 compared to 34.2% in 2017.
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The purpose of this annual publication is to provide internationally comparative data on tax levels and tax structures in member countries of the OECD. The taxes imposed in each country are presented in a standardised framework based upon the OECD classification of taxes and its Interpretative Guide as contained in Annex A to this Report.
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