Buying a car in Connecticut
Every figure below is sourced to Connecticut’s own revenue or motor vehicle publications and dated. Estimates only.
Auto loan calculator
The real out-the-door number — including whether your state credits your trade-in against the sales tax.
Auto lease calculator
Money factor, residual, and the payment — taxed by your state's actual method, since some states tax a lease's full value upfront instead of each payment.
Loan payoff calculator
What paying extra actually saves you — in interest and in months — on a car loan, a personal loan, or anything else that amortizes.
0% APR vs. cash rebate
Which dealer offer actually costs less over the life of the loan, and the rate at which they tie.
Personal loan calculator
Payment, total interest, and the effective APR once an origination fee is deducted from what actually reaches your account.
Debt consolidation calculator
Whether one loan actually beats paying your existing debts off as they are — measured against the best you could do without consolidating.
Auto refinance calculator
Whether refinancing your car loan is worth it — including whether a lower payment is being bought with a longer term on a depreciating asset.
Lease vs. buy a car
The same car both ways over the same months, with the resale value credited to the buyer — the part most comparisons leave out.
Connecticut at a glance
- State sales tax
- 6.35%
- Local tax is added on top in most states — treat this as a floor.
- Trade-in credit
- Reduces your tax
- You are taxed on the price less your trade-in allowance.
- Dealer doc fee
- Uncapped
- Connecticut sets no statutory ceiling on this fee.
- Title and registration
- $145.00
- $25.00 title + $120.00 registration.
Connecticut taxes the car every year, not just at purchase
A recurring annual tax on the vehicle’s value applies here — assessed at 70% of value at a representative 3.246% rate. It never appears in a monthly payment and is easy to miss when comparing states.3.246% is the 32.46-mill statutory CAP on municipal motor vehicle mill rates, which is the defensible 'typical' figure because many municipalities sit at or near it and none may exceed it. IMPORTANT STRUCTURAL DIFFERENCE from Arizona and Colorado: the 70% ratio is NOT applied to MSRP or purchase price. Effective with the 2024-10-01 grand list, assessors first apply a statutory depreciation schedule to MSRP (85% up to year one, 80% year two, 75% year three, 70% year four, 65% year five, declining to 15% for years fifteen to nineteen), and only THEN multiply by the 70% assessment ratio. No vehicle may be assessed below $500. OPM's own example for a 2020 Honda Accord LX: MSRP $24,020 x 65% = $15,613; x 70% = $10,929.10; x 32.46 mills = $354.76. A municipality may by vote adopt a more generous schedule under PA 25-2.
Local tax in Connecticut
Connecticut has no local sales taxes — 6.35% is the full rate. A higher LUXURY rate of 7.75% applies to vehicles registered as passenger or combination where the total cost exceeds $50,000, and per CT DMV the $50,000 threshold is tested against the sale price BEFORE any trade-in reduction even though the trade-in still reduces the amount the rate applies to. Separately, Connecticut municipalities levy a recurring annual motor vehicle property tax.