IELTS level for admission to academic institutions
IELTS minimum levels required by institutions vary according to the particular college or school and country. As a rule, institutions from English-speaking countries require a higher IELTS band than those from non English-speaking countries. According to the IELTS official site  the highest IELTS Band required by a University is 8.5, with only two institutions, both from the U.S.: the Graduate School of Journalism at Columbia University and the Moritz College of Law at the Ohio State University. The highest IELTS Band required by institutions from the United Kingdom is 7.5, which is the Research Centre for English and Applied Linguistics at the University of Cambridge .
Most IELTS requirements by Universities are between 5.5 and 7.0. For example, Liverpool University requires 7.5, Cambridge University 7.0 and Birmingham University 6.0 as the minimum levels, Essex University requires minimum 5.5. In Germany, Stuttgart University requires an IELTS minimum of 6.0.