N.D. Cent. Code § 57-20-10

Real estate taxes, either current or delinquent, may be paid in installments of not less than ten percent of the amount of the tax, plus penalty and interest if any, but each such installment in no event may be less than ten dollars. Credit must be given on the tax records for the installment payments so made, and penalty and interest must be computed only upon the balance of the tax remaining unpaid.