1. Except as otherwise provided in subsection 2 and NRS 361.485, interest must be paid on an overpayment of the taxes imposed by this chapter at the rate of 0.25 percent per month, or fraction thereof, from the last day of the calendar month in which the overpayment was made to the last day of the calendar month in which a refund is made.
2. No interest is allowed:
(a) On a refund of any penalty or interest paid by a taxpayer; or
(b) If the ex officio tax receiver determines that the overpayment was made intentionally or by reason of carelessness.