The Institute of Indirect Taxation (IIT) was a distinct professional body in the United Kingdom prior to its merger with the Chartered Institute of Taxation in August 2012.
Members of the IIT specialised in the study and practice of indirect taxes.
Entry to the institute was normally gained by taking up to four professional examinations in indirect taxation.
It was possible to gain exemptions from some of the exams through possessing other suitable qualifications which include those from various British accountancy professional bodies, the Chartered Institute of Taxation and HM Revenue and Customs.
The four papers were: Those who have passed the examinations and been accepted into membership were entitled to use the designatory letters AIIT (Associate of the Institute of Indirect Taxation).