Interest on delayed tax payments requires payment of notified interest and higher interest for undue or excess input tax claims. Interest accrues where a person liable to pay tax fails to remit tax within the prescribed period; interest is payable for the period the tax remains unpaid at a rate notified by the Government on the Council's recommendation, calculated from the day after the tax was due in the prescribed manner. Undue or excess input tax credit claims or undue or excess reductions in output tax liability attract interest on the excess amount at a higher rate notified by the Government on the Council's recommendation.