Used car sales in Connecticut between private parties are documented with a bill of sale (Form H-31 is the state-published version) and a properly assigned Certificate of Title. The buyer is responsible for paying 6.35% CT sales tax (7.75% above $50,000) at the DMV and must complete the title transfer within 60 days. Connecticut's Lemon Law generally does not protect private-party used car purchases — most sales are "as-is" — so buyers should request maintenance records, run a VIN check, and consider an independent inspection before signing.
Selling a used car as-is? Our private sale checklist walks you through price research, safely screening buyers, and the exact paperwork steps — so nothing slips through and you stay protected from post-sale disputes. Read: Private Car Sale Checklist →
Connecticut Used Car Bill of Sale — What You Need to Know
Used car buyers must transfer title within 60 days using Form H-13. The seller signs the title assignment and completes the odometer disclosure for vehicles under 20 model years old.
Inspection
Not required
Sales Tax Details
CT charges 6.35% sales/use tax on used cars, or 7.75% if the sale price exceeds $50,000. Tax is calculated on the greater of declared price or NADA clean retail value.
Exemption: Family transfers (spouse, parent, child, sibling, grandparent, grandchild) are exempt — file Form CERT-106 with the DMV at registration.
Inspection Requirements
No statewide safety inspection. Emissions testing is required biennially in most CT towns for 1986-and-newer vehicles. Out-of-state vehicles need a VIN verification at DMV.
Registration
Registration for this vehicle type is handled by Connecticut DMV — not the same agency that handles cars in Connecticut. Plan for separate filings.
Connecticut Used Car Sale — Step-by-Step Checklist
Run a VIN history report (NMVTIS, Carfax) to check for branded titles, accidents, or odometer discrepancies
Have a trusted mechanic perform a pre-purchase inspection
Complete Form H-31 with full VIN, year/make/model, mileage, price, date and both signatures
Confirm seller signs the CT title assignment and completes the federal odometer disclosure
Buyer files Form H-13 at CT DMV within 60 days with title, bill of sale, insurance card and ID
Pay 6.35% sales tax (7.75% if over $50,000) plus title fee ($25) and registration fees at DMV
Schedule emissions testing within 30 days if your town participates in the CT emissions program
Common Pitfalls
Treating a private used car sale as if Lemon Law applies — it does not for most private transactions
Skipping the VIN history report and inheriting a salvage, flood or rebuilt title surprise
Declaring a price below NADA value — DMV will tax on book value anyway and may flag the deal
Letting the 60-day registration window expire and triggering late fees
Forgetting that out-of-state titles require a VIN verification before CT DMV will issue plates
Not factoring annual town property tax into total cost of ownership
Pro Tip
Inspect the vehicle, run a VIN report, complete Form H-31 with the seller, and bring everything to CT DMV within 60 days. Budget for 6.35% sales tax, title and registration fees, plus annual town property tax.
Connecticut Used Car Bill of Sale — FAQs
Are private used car sales in Connecticut "as-is"?
Yes, in nearly all cases. Connecticut's Lemon Law (CGS § 42-179) covers new vehicles and certain used vehicles sold by licensed dealers, but private-party sales are generally "as-is" unless the seller provides a written warranty or commits fraud. Buyers have no automatic right to return a private-party used car. This is why a thorough pre-purchase inspection, VIN check, and clearly worded bill of sale are essential — once you sign and pay, the vehicle is yours along with any latent problems.
How is sales tax calculated when I buy a used car from a private seller?
CT DMV calculates 6.35% sales/use tax on the greater of the declared purchase price or the NADA clean retail value. If the vehicle sells for more than $50,000, the rate jumps to 7.75% on the entire price. The tax is collected when you register the vehicle, not by the seller. If you are claiming a family-transfer exemption, file Form CERT-106 at the DMV. Out-of-state purchases brought into CT are also subject to 6.35% use tax (with credit for tax already paid elsewhere).
What documents do I need to register a used car in Connecticut?
You need the original CT title properly signed by the seller (or out-of-state title), a completed Form H-13 (Application for Registration and Certificate of Title), a bill of sale (H-31 or equivalent), proof of CT minimum liability insurance (25/50/25), valid photo ID, and payment for sales tax, title fee ($25) and registration fees. Out-of-state vehicles also require a VIN verification — the DMV examiner does this at the office. Bring the lien release if there was a loan paid off.
Does the seller need to do anything after the sale?
Yes. The seller should remove their license plates immediately (CT plates stay with the seller, not the vehicle), notify CT DMV of the sale to stop being associated with the vehicle, cancel insurance only after plates are returned or transferred, and keep a signed copy of the bill of sale for tax and liability records. Failing to notify DMV or remove plates can leave the seller exposed to tickets, tolls, and town property tax bills on a vehicle they no longer own.
What if the used car fails emissions after I buy it?
In Connecticut, emissions compliance transfers to the new owner. If you buy a used car that needs emissions testing in your town and it fails, you are responsible for repairs up to the state's emissions repair cost waiver limit (currently $895 in documented repairs). Some buyers negotiate an emissions-pass contingency into the bill of sale, requiring the seller to deliver a passing test. This is best handled in writing before money changes hands. Vehicles less than four model years old are typically exempt.