New Jersey Statutes Title 40. Municipalities and Counties 40 § 48C-37

Except as otherwise provided in Articles 4 and 7 of this act,  1 any ordinance adopted pursuant to this act shall provide that if for any reason the tax is not paid when due, interest at a rate of 12% per annum on the amount of said tax, and an additional penalty of 1/2 of 1% of the amount of the unpaid tax for each month or fraction thereof during which the tax remains unpaid, shall be added and collected. Where action is brought for the recovery of any such tax, the taxpayer liable therefor shall, in addition, be liable for the costs of collection and the interest and penalties therein imposed.