The amount of a penalty for which P is liable under any of paragraphs 1 to 4 shall be reduced by the amount of any other penalty incurred by P, or any surcharge for late payment of tax imposed on P, if the amount of the penalty or surcharge is determined by reference to the same tax liability.

If P is liable to a penalty under section 9 of FA 1994 in respect of a failure to comply with a relevant obligation, the amount of any penalty payable under paragraph 1 in respect of the failure is to be reduced by the amount of the penalty under that section.

Where penalties are imposed under paragraph 3(1) and (2) in respect of the same act or use, the aggregate of the amounts of the penalties must not exceed 100% of the potential lost revenue.