The Tax Foundation has released U.S. Lags While Competitors Accelerate Corporate Income Tax Reform:

New data from the Organization for Economic Cooperation and Development (OECD) shows that the U.S. corporate tax rate has fallen even further out of step with the rest of the industrialized world as countries such as Canada, the Czech Republic, Korea, and Sweden have cut their corporate rates in 2009, lowering the average statutory corporate tax rate of all OECD nations to 26.5%.

With a combined federal and state corporate tax rate of 39.1%, the U.S. continues to impose the second-highest overall corporate rate among industrialized countries. Only Japan's 39.5% combined rate is higher. As the chart below indicates, the weighted average (accounting for country size) corporate rate of non-U.S. OECD nations is now below 30% for the first time in history. 2009 marks the 12th consecutive year in which the average corporate tax rate of non-U.S. OECD nations has been below the U.S. rate.