The ARB has made a payment of nearly £100,000 to the Inland Revenue (IR) after a row over payments to board members.
The settlement relates to an unpaid amount incurred 'as a result of a failure to deduct tax at source' dating back to 1997.
The board's chief executive Robin Vaughan admitted the ARB had been forced by the Revenue to make the payment.
He claimed the ARB relied on advice given by the IR not to class board members as employees and, therefore, they had not made PAYE contributions.
According to Vaughan, IR then changed its mind.