N.D. Cent. Code § 57-61-05
When the severance tax provided for in this chapter becomes delinquent, there is hereby imposed a penalty of five dollars, or a sum equal to five percent of the tax due, whichever is greater, with interest at the rate of one percent per month on the tax due, for each calendar month or fraction thereof during which such delinquency continues, excepting the month within which such tax became due. The tax commissioner, for good cause shown, may waive the penalty or the interest provided by this section. If the return is not filed within twenty-five days after the end of any month and taxes due paid, the tax commissioner shall notify the delinquent owner or operator of such delinquency, and if such return and remittance are not filed within an additional fifteen days, the tax commissioner shall notify the public service commission, which shall forthwith suspend such owner's or operator's license or permit until such time as payment is received or the issues settled to the satisfaction of the tax commissioner.
N.D.C.C. § 57-61-05