Interest on delayed tax payments accrues from the day after due date at notified rates; higher interest applies to excess input credit claims. Liable taxpayers who fail to pay tax within the prescribed period must pay interest on the unpaid tax from the day after the tax was due, at a rate (not exceeding eighteen per cent) notified by the Government. Taxable persons who make undue or excess input tax credit claims or undue or excess reductions in output tax liability must pay interest on those amounts at a higher notified rate (not exceeding twenty-four per cent).