MA refers to theirs as an Excise tax. Their formula is also much simpler than CT.

Here is how MA figures their auto tax:

Tax is $25 per $1000 valuation. Valuation is based off a percentage of MSRP, a figure which stays static for the life of the vehicle. (Note this is MSRP, NOT the actual purchase price of the vehicle)

Prior to current model year (2023 vehicle in 2022): 50%

Current model year: 90%

2nd year: 60%

3rd year: 40%

4th year: 25%

5th year and older: 10%