IRS Business Master Files

IRS Business Master Files use the following naming convention:[2 digit year of release][2 digit month of release].csv


bmf.bm1608.csv refers to the Business Master File for August, 2016. This corresponds to the data dictionary entry for "BMF 08/2016".



Urban Institute, National Center for Charitable Statistics. ([Year]). Internal Revenue Service, Exempt Organizations Business Master File. [Data files]. Available from:



All files are presented strictly as is. NCCS is not providing technical assistance or customized data extracts at this time.