Estimates of the number of taxpayers at each income tax rate band are published in HM Revenue and Customs' National Statistics which are available on the internet.
The figures at UK level are published in table 2.1:
The latest available published data shows a projection of 314,000 higher rate taxpayers in the West Midlands in 2015-16.
These estimates are based on the 2012-13 Survey of Personal Incomes, projected to 2015-16 using economic assumptions consistent with the Office for Budget Responsibility’s March 2015 economic and fiscal outlook.
HM Treasury does not publish this information at constituency level.