A study of the progressiveness of household taxes (income plus social security taxes) by the Organisation for Economic Co-Operation and Development charts the percent of taxes paid by the top 10 percent of households in OECD countries and compares that number to the percent of income earned in each country by the same top 10 percent. The U.S. finishes at the top of the list, with the highest tax-to-income ratio of any country. Above are the top countries, as well as the average for all 24 OECD countries studied.
