Based on a comparison of 32 countries in 2011, Denmark ranked the highest in personal income tax as a share of GDP with 24.5% followed by Iceland and Finland. On the other end of the scale was Slovakia with 2.52%, Czech Republic with 3.70% and Turkey with 3.77%.
Data for more countries are available at Personal Income Tax (As % of GDP) indicator page.
| Personal Income Tax (As % of GDP) | Unit | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Australia | % | 11.9% | 11.0% | 10.9% | 10.2% | 9.65% | ... | |||||||||||||||
| Austria | % | 9.25% | 9.27% | 9.39% | 9.91% | 9.47% | ||||||||||||||||
| Belgium | % | 12.9% | 12.3% | 12.1% | 12.5% | 12.1% | ||||||||||||||||
| Canada | % | 11.8% | 11.9% | 12.3% | 12.0% | 11.4% | ||||||||||||||||
| Denmark | % | 24.9% | 24.8% | 25.3% | 25.1% | 26.3% | ||||||||||||||||
| Finland | % | 13.5% | 13.3% | 13.0% | 13.2% | 13.4% | ||||||||||||||||
| Germany | % | 8.08% | 8.64% | 9.10% | 9.62% | 9.45% | ||||||||||||||||
| Iceland | % | 14.2% | 14.0% | 13.8% | 13.2% | 12.9% | ||||||||||||||||
| Ireland | % | 8.23% | 8.69% | 8.77% | 8.10% | 7.69% | ||||||||||||||||
| Italy | % | 10.4% | 10.7% | 11.1% | 11.5% | 11.7% | ||||||||||||||||
| New Zealand | % | 15.0% | 14.6% | 14.6% | 13.8% | 13.0% | ||||||||||||||||
| Norway | % | 9.60% | 9.00% | 9.53% | 9.10% | 10.3% | ||||||||||||||||
| Sweden | % | 15.4% | 15.4% | 14.6% | 13.8% | 13.4% | ||||||||||||||||
| USA | % | 9.52% | 10.1% | 10.6% | 10.0% | 8.14% | ||||||||||||||||
| United Kingdom | % | 10.3% | 10.5% | 10.8% | 10.8% | 10.4% |
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