What is a “supplemental” motor vehicle tax bill?

If you newly registered a motor vehicle after October 1, (first time registration), you will receive a pro-rated tax bill in December, payable by February 1. This “supplemental” bill will reflect the time from the month the vehicle was first registered, through September only. For further information on the Supplemental Motor Vehicle taxes, please see its section under Additional Links on the Tax Collector’s page.