Business Rewards Miles are valid for three years from the flight date. They will expire on the next anniversary of the organisation’s joining date.
For example, if the joining date of your organisation was in August 2008, and you earned Business Rewards Miles in June 2009, your Miles will expire on 31st August 2012. Or, if you earned Miles in October 2008 and the joining date of your organisation is in May 2008, your Miles will expire on 31st May 2012.