States · Connecticut

Connecticut Vehicle Registration Cost

Connecticut's vehicle costs are dominated by the annual motor vehicle property tax — billed by your town (Connecticut has 169 towns, no counties). State law CAPS the motor vehicle mill rate at 32.46 mills (effective FY 2022-23+), giving a maximum effective rate of 2.27% on depreciated MSRP. Most CT towns are at or near this cap. Sales tax is 6.35% on vehicles under $50,000 and jumps to 7.75% on the FULL amount for vehicles $50,000+ (a "luxury tax" cliff that surprises buyers). Registration is triennial $40/year annualized plus various state surcharges (Clean Air, Greenhouse Gas, Parks Pass) totaling about $27/year. Notably, Connecticut has NO EV registration surcharge. A new $35,000 vehicle in a typical CT town runs about $3,000 in first-year costs, with annual renewals around $815 in year 1 dropping to roughly $300 by year 8 as depreciation reduces the assessed value.

How Connecticut calculates registration

• Triennial Registration Fee (annualized) — $40 (annual) Connecticut registers passenger vehicles for 3-year periods at $120 total. Shown here as $40/year for comparability; you actually pay $120 every 3 years to CT DMV.
• State DMV Fees (Clean Air + Greenhouse Gas + Parks Pass + Admin) — $25 (annual) Combined annualized state surcharges: Clean Air Act fee ($15), Greenhouse Gas fee ($15), Passport to the Parks ($24, raised in 2025), Plate fee ($7), Admin fee ($10) — totals about $80 in mandatory fees over a 3-year registration cycle (≈$27/year).
• Annual Motor Vehicle Property Tax (mill rate × 70% × MSRP) — 2.27% of depreciated value (annual) Per CT General Statutes §12-71b. Formula: MSRP × statewide depreciation percentage × 70% assessment ratio × your municipal mill rate. The state CAPS the motor vehicle mill rate at 32.46 mills (CGS §12-71e), effective FY 2022-23 onward. With the 70% assessment ratio, this yields a MAXIMUM effective rate of 2.27% on depreciated MSRP. Most CT towns are AT this cap; lower-rate towns like Greenwich (~11 mills) have effective rates closer to 0.77%. The depreciation schedule is set by the state Office of Policy and Management (uniform statewide). Vehicle assessment cannot fall below $500 per CT law.
• Title Fee — $25 (one-time) One-time fee for new title. Add $10 if a lienholder is recorded.

Sales tax

Connecticut charges 6.35% state sales tax . Trade-in credit: full. Tax basis: purchase price.

Connecticut charges 6.35% state sales tax on vehicles with NO local additions — same statewide. BUT: vehicles with a taxable price OVER $50,000 are taxed at the 7.75% "luxury rate" applied to the FULL amount (not just the excess over $50K). So a $49,999 vehicle pays 6.35% = $3,175; a $50,001 vehicle pays 7.75% = $3,875 — a $700 cliff. Trade-in is fully credited against the taxable amount before this calculation.

Electric vehicles

Connecticut does NOT impose an EV registration surcharge as of 2026 — making it one of only ~10 states without one. Combined with the recent Tesla/Rivian etc. property tax assessment changes (using purchase price rather than MSRP for some newer EV models), CT is moderately friendly for EV ownership though the property tax can still be substantial in high-mill towns.

What makes Connecticut distinctive

• Connecticut's motor vehicle mill rate is CAPPED AT 32.46 MILLS statewide per CGS §12-71e (in effect since FY 2022-23). Before the cap, towns like Hartford and Waterbury charged 74+ mills on vehicles (effective rates over 5% of MSRP). Today, regardless of your town's mill rate for real property, your vehicle is taxed at NO MORE than 32.46 mills × 70% × depreciated MSRP. Greenwich (low-rate town) charges ~11 mills, while most towns are at the 32.46 cap.
• Connecticut's 7.75% "luxury" sales tax rate applies to the FULL taxable amount when the vehicle price exceeds $50,000 — NOT just the portion over $50K. So a $49,999 vehicle pays $3,175 in sales tax while a $50,001 vehicle pays $3,875 — a $700 jump from a $2 price increase. Buyers near the threshold should consider this cliff carefully.
• Connecticut is one of about 10 US states with NO EV registration surcharge as of 2026. The state has historically focused on EV incentives rather than surcharges, though state EV rebates (CHEAPR program) have been reduced from earlier highs. Combined with the lack of surcharge, CT is neutral-to-friendly for EV ownership compared to neighbors like MA, NY, RI.
• Connecticut requires you to pay your town property tax BEFORE the DMV will renew your registration — same pattern as VA, NC, SC, MO. Your town tax collector sends the bill in July (covering October-September period). If you sell a vehicle mid-year, you may be entitled to a prorated refund of the property tax paid.
• Connecticut uses MSRP (not purchase price) as the basis for annual vehicle property tax, with a state-mandated uniform depreciation schedule (set by the Office of Policy and Management). A used vehicle's tax is based on its ORIGINAL MSRP times the age depreciation, not what you paid. This is similar to Massachusetts and Colorado but unusual among ad valorem states.