Rounding off rule: GST amounts are adjusted to the nearest rupee, with fractional paise treated by the prescribed threshold. Sums of tax, interest, penalty, fine or any other payable amount, and refunds or other amounts due, must be rounded off to the nearest rupee; a fractional rupee expressed in paise of fifty paise or more is increased to the next rupee, and a fractional part less than fifty paise is ignored.