Pennsylvania Used Car Sales Tax: 6%, 7%, 8% and Fair Value Rules

As of Oct 19, 2026, Pennsylvania charges 6% sales tax on a used car, 7% if you live in Allegheny County and 8% if you live in the City of Philadelphia, and you pay it to PennDOT through the agent handling your title, and that's true for a dealer purchase and for a car bought from a neighbor. On a private sale the tax is figured on the purchase price, but if that price sits far below book value, expect paperwork and possibly a bill from the Department of Revenue later.

That second part trips up a lot of people. A $1 "sale" between relatives, or a $2,000 price on a car that books at $9,000, is exactly what the state looks for. I went through PennDOT's buying-and-selling fact sheet, Revenue's sales tax and understated-value pages and the Pennsylvania Code on Monday, October 19, 2026. The forms are named below so you can ask for them.

The rate and who collects it

Revenue's sales, use and hotel occupancy tax page sets the state rate at 6%, with a 1% local tax added in Allegheny County and 2% in Philadelphia. PennDOT's Buying or Selling Your Vehicle fact sheet applies that to vehicles: 6% of the purchase price or current market value, 7% for Allegheny County residents and 8% for City of Philadelphia residents. Notice it's tied to where you live, not where the seller lives.

Quick math on an $8,000 car: $480 in most of the state, $560 in Allegheny County, $640 in Philadelphia. The tax gets paid when the title is transferred, through an authorized PennDOT agent or dealer. For a vehicle already titled in Pennsylvania that's Form MV-4ST; for one coming from out of state it's Form MV-1. Our Pennsylvania title transfer guide covers notarization, plates and the rest of the visit.

When the price looks too low

Form MV-3, PennDOT's fair market value verification, has to be completed when the price on the MV-1 or MV-4ST is less than 80% of the average fair market value in a PennDOT-approved guide. The form names N.A.D.A., the Automobile Red Book, Black Book, American Used Car Guide and Kelley Blue Book. It also kicks in when a vehicle over 15 years old sells for under $500, or when it isn't listed in a guide at all.

Behind that sits Revenue's Motor Vehicle Understated Value Program. If your reported price is well below fair market value, Revenue can ask you to prove it. A bill of sale counts if it shows both parties' names, addresses and phone numbers, the price, the date, the make and model and the VIN. Copies of the MV-1, MV-3, MV-4ST or MV-13 filed with PennDOT don't count. If you can't back up the price, you're billed tax on fair market value plus penalty and interest from the purchase date. You can argue the car was worth less with repair bills or a written appraisal from a certified dealer. Keep the bill of sale and photos of whatever made the car cheap.

Trade-ins

The fact sheet says that when the seller takes your vehicle as a trade-in, tax applies to the difference. Trade a $5,000 car toward a $15,000 one and you're taxed on $10,000, which is $600 at 6%. The Pennsylvania Code rule, 61 Pa. Code 31.44, adds a condition people miss: the trade has to happen at the same time as the sale. Selling your old car separately to the same buyer and using the cash doesn't count as a trade-in.

Family, gifts and liens

Pennsylvania has no blanket exemption for selling a car to a relative. 61 Pa. Code 31.48 lists transfers presumed not to be for a price: a true gift, an inheritance, a sole proprietorship to its owner, a transfer between spouses (unless it's part of a property settlement), from joint spouses to one spouse, from a trustee to a beneficiary, and a raffle prize. If your brother pays you $3,000, that's a taxable sale. If he pays nothing, it may be a gift.

Gifts go on Form MV-13ST, the Affidavit of Gift, where both sides swear nothing of value changed hands. Revenue's understated-value page says agents sometimes tell people to write $1 on the MV-4ST for a gift, and that's wrong; a nominal price tends to trigger a review. It also says the gift recipient has to show sales tax was paid when the car was bought, or pay use tax on its current value. And if "gift" really means you took over the payments, tax is due on the lien amount you assumed.

Bought out of state

Pennsylvania credits sales tax you paid to another state, but only if that state gives the same credit for Pennsylvania tax; Revenue's REV-227 chart lists which ones. The vehicle rental taxes Revenue lists separately apply to renting, not to buying a used car, so ignore them here. Our general used car sales tax explainer compares how states handle all of this.

Checklist before you go to the tag office

• A signed bill of sale with every item Revenue lists, including the VIN.
• Book value printouts if your price is under 80% of guide value.
• MV-13ST signed by both parties if it's a gift, with proof tax was paid originally.
• Valid safety inspection, or plans to inspect within 10 days.
• A history report you pulled yourself, plus a title brand search on NMVTIS.

Tax law won't protect you from a bad car, so read what Pennsylvania's lemon law does and doesn't cover on a used one. We're a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck or Experian. In mid October 2026 a guest report cost about $5.50, a member report about $4.50, and a two-report bundle about $6.75, compared with roughly $39.99 to $44.99 retail. Prices change, so check checkout before you count on them.

Sources

• PA Department of Revenue: sales and use tax; Understated Value Program (read Oct. 19, 2026)
• PennDOT: buying or selling fact sheet; Form MV-13ST
• Pennsylvania Code: 61 Pa. Code 31.48