A taxpayer aggrieved by an assessment to income tax or corporation tax may appeal within 30 days of the notice of assessment. The appeal may be settled before the appeal hearing by agreement between the inspector and the appellant or by withdrawal of the appeal (s 933).
The Appeal Commissioners must hear the evidence and order that the assessment be reduced, stand good, or be increased (s 934). They may summon and examine witnesses (s 939), and they may determine liability in cases of default (s 940).
The taxpayer may request that the appeal decision be reheard by a Circuit Court judge (s 942). If dissatisfied on a point of law, he may request the Appeal Commissioners to state a case for the opinion of the High Court (s 943).