Massachusetts Used Car Sales Tax: 6.25%, Book Value on Private Sales and Exemptions

Massachusetts charges 6.25% sales or use tax on a used car, and on a private sale it's figured on whichever is higher, the price you paid or the car's clean trade-in book value. As of Oct 19, 2026 that's the rule on the state's own pages. So a cheap private-sale price doesn't always mean a cheap tax bill. Family transfers between close relatives and true gifts can be exempt, but only with the right form and only if the person handing over the car paid Massachusetts tax on it.

I read the Department of Revenue's guide to sales and use tax on motor vehicles, two RMV pages on buying from an individual and on family and gift transfers, and the two statutes behind them, on Oct 19, 2026. Mass.gov blocks automated requests, so I'm citing those pages without links. The DOR guide was last updated in September 2022, which is worth knowing.

Dealer sale vs. private sale

The rate is the same 6.25% either way. What changes is the number it's applied to.

• From a dealer: tax is on the sales price, and the DOR guide says you can subtract a trade-in if tax was paid on it.
• From a private seller: tax is 6.25% of the greater of the price or the clean trade-in value in a recognized used car guide. DOR says the RMV adjusts that book value for mileage but not for condition, and no trade-in deduction applies.

This is the part that stings. Say you pay a private seller $6,000 for a car whose clean trade-in value is $9,000. You pay 6.25% of $9,000, which is $562.50, instead of $375 on the price. The RMV's page on buying from an individual describes it the same way, as 6.25% of the price or the NADA trade-in value, whichever is higher. If the car really has problems that justify the low price, DOR says you can apply for an abatement after paying if you think the book value is wrong. Keep repair estimates and photos.

One exception runs the other way. DOR says a car with a salvage title is taxed on the actual price paid. Our Massachusetts salvage and rebuilt title rules explain what that brand means for registration and inspection.

Where the law comes from

General Laws chapter 64H, section 25 treats every registration transfer as a retail sale unless shown otherwise. Chapter 64I, section 7 then says a buyer from someone who isn't a dealer pays the use tax unless they're the seller's spouse, mother, father, brother, sister or child. That list matters for the next section.

Family transfers and gifts

DOR's guide lists two separate exemptions:

• Family transfer (Form MVU-26): between a parent, spouse, child or sibling, if the person transferring the car paid Massachusetts sales or use tax on it.
• Gift (Form MVU-24): no money changes hands and no loan is assumed, and the giver previously paid Massachusetts tax.

The RMV's family and gift page adds that grandparents, aunts, uncles and cousins don't count as family for this purpose, though DOR's gift exemption doesn't list a relationship test, so a true gift may still work. Ask the RMV first. It also lists a $25 gift transfer fee. If you take over the payments on a relative's car, it isn't a gift, so plan on paying the tax.

Deadlines and paperwork

• Tax due: DOR says by the 20th day of the month after the purchase.
• Registration and title: file within 10 days, per both DOR and the RMV.
• Title fee: $75, per the RMV's individual-purchase page.
• Inspection: within 7 days of registering.

Bought the car out of state? DOR says use tax applies if you bring it into Massachusetts within six months of buying it, with credit for sales tax paid to another state under its reciprocity rules (Form MVU-29). And if a deal falls apart, DOR allows a refund when the sale is rescinded and the car is returned within 180 days. Our Massachusetts private-sale title transfer guide covers the title side.

Check the car before the tax

Paying tax on book value for a car with a hidden problem is a double hit. Run the VIN through NMVTIS for brands, then pull a CARFAX report or AutoCheck for accidents and odometer readings. The odometer reading matters twice here, since the RMV adjusts the book value for mileage. For other states' rules, see our used car sales tax overview.

So you know who we are: CarVins resells CARFAX and AutoCheck reports under license and isn't connected to CARFAX, AutoCheck or Experian. Around mid October 2026, a guest report cost roughly $5.50, a member report $4.50 and the pair $6.75, against about $39.99 to $44.99 retail. Prices can shift, so the number at checkout is the one that counts.

Sources

• Massachusetts DOR, Guide to Sales and Use Tax on Motor Vehicles (updated Sept. 15, 2022; read Oct. 19, 2026)
• Massachusetts RMV, Buying a vehicle from an individual, and Family and gift transfers (read Oct. 19, 2026)
• M.G.L. c. 64H, s. 25
• M.G.L. c. 64I, s. 7