Motor Vehicles

Mill rate for motor vehicles is 32.46

If the bill is paid in full and subsequently adjusted, a request for a refund must be made to the Tax Office online or in writing and can be submitted with documentation for adjustment.

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If you transferred your plates to a new vehicle, you are not entitled to an adjustment. In essence, the adjustment follows the license plate. The original bill for the old vehicle should be paid. A supplemental list will generate a bill for the new vehicle with a credit (exemption) for the period that the old vehicle was no longer owned. 

Vehicles registered after October 1st and before September 30th will be on the supplemental motor vehicle list, as described below. Supplemental bills are mailed mid-December and are due January 1st, with a 30-day grace period for payment.

Example: Vehicle registered April 15, 2025 will be on the 2024 Supplemental MV list, billed mid-December 2025, due January 1, 2026.

Supplemental motor vehicle bills cover motor vehicles registered after October 1st  and before August 1st each year. Motor vehicle taxes are prorated from the month registered through September at the following percentages of assessed value:

CT Department of Motor Vehicles does not inform towns when plates are returned nor when vehicles are sold, registered out of state, or otherwise disposed. It is the taxpayer's responsibility to provide the required documentation within the time limits as provided under applicable CT law.

The proof for adjustments (“prorates”) of motor vehicle list must be presented within 27 months of the assessment date.

Example: The owner of a vehicle with a bill with an assessment date of October 1, 2024 has until December 31, 2026 to present all proofs of disposal. Taxpayer's failure to provide all forms of proof for adjustment within the 27 months of the assessment date forfeits the right to an adjustment of the bill pursuant to CGS §12-71c.

Please visit our Board of Assessment Appeals web page for more information. 

Out-of-state residents who are based in Connecticut must file Soldiers & Sailors Civil Relief Act form annually with the Assessment Office.  

Residents of Connecticut who are active duty members of the armed forces must file the Active Duty Military Service Motor Vehicle Exemption Application form annually with the Assessment Office.