Based on a comparison of 124 countries in 2019, Denmark ranked the highest in tax revenue as a share of GDP with 32.3% followed by Seychelles and Lesotho. On the other end of the scale was Somalia with < 0.001%, United Arab Emirates with 0.965% and Iraq with 1.34%.
Data for more countries are available at Tax Revenue (As % of GDP) indicator page.
| Tax Revenue (As % of GDP) | Unit | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| Austria | % | 26.4% | 26.4% | 26.8% | 25.4% | 25.4% | ... | |||||||||||||||
| Belize | % | 23.8% | 25.5% | 25.1% | 26.0% | 26.3% | ... | ... | ||||||||||||||
| Denmark | % | 33.8% | 36.5% | 33.9% | 33.3% | 33.4% | ... | |||||||||||||||
| Greece | % | 23.8% | 24.4% | 24.6% | 26.3% | 25.9% | ||||||||||||||||
| Jamaica | % | 24.0% | 24.1% | 24.8% | 26.0% | 26.2% | ... | |||||||||||||||
| Lesotho | % | 35.1% | 35.5% | 33.6% | 28.6% | 31.7% | ... | |||||||||||||||
| Luxembourg | % | 25.9% | 25.7% | 25.0% | 24.9% | 25.2% | ... | |||||||||||||||
| Macao | % | 36.4% | 34.8% | 28.9% | 27.6% | 28.8% | ||||||||||||||||
| Malta | % | 25.7% | 26.0% | 24.3% | 25.2% | 25.7% | ... | |||||||||||||||
| Namibia | % | 33.1% | 34.8% | 33.6% | 30.3% | 32.1% | ... | |||||||||||||||
| New Zealand | % | ... | ... | 26.6% | 26.8% | 27.4% | 27.2% | 27.6% | ... | ... | ||||||||||||
| Seychelles | % | 28.1% | 30.1% | 29.6% | 31.7% | 32.1% | ... | |||||||||||||||
| South Africa | % | 25.5% | 25.9% | 26.5% | 26.3% | 26.2% | ... | |||||||||||||||
| Sweden | % | 26.5% | 26.5% | 27.1% | 28.1% | 28.1% | ... | |||||||||||||||
| United Kingdom | % | 25.0% | 24.8% | 25.0% | 25.3% | 25.5% | ... |
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