The license must be renewed during the month of January each year. Otherwise, you will be charged an additional fee beginning February 1st. Licenses issued after the 31st of January will be subject to a surcharge of $15.
Under state law N.J.A.C. 8:23A, the immunity of the rabies vaccine should extend at least within ten of the twelve months of the license. You cannot get a license if the rabies vaccination expires before November 1st.