A PA trailer bill of sale is the written record of a private trailer sale in Pennsylvania: it names the buyer and seller, identifies the trailer, and states the price. Pennsylvania does not require a specific form, but the document you sign at the sale will drive the sales tax PennDOT charges and back up your title application, which the buyer must file within 20 days of the sale.
What to Put on the Bill of Sale
Pennsylvania does not prescribe a single mandatory bill of sale form for private trailer sales, so the goal is to capture enough detail that the trailer, the parties, and the transaction can’t be confused with anything else. At a minimum, write down:
- Full legal names and current residential addresses for the buyer and the seller.
- The exact dollar amount paid. This figure sets the buyer’s sales tax.
- The date of sale. That date starts the buyer’s 20-day clock to apply for a new title.
- The full 17-character Vehicle Identification Number, taken directly off the trailer’s frame or plate.
- Make, model, and year, matching the existing title or manufacturer’s label.
- The Gross Vehicle Weight Rating, which determines the trailer’s registration class and annual fee.
Copy the VIN from the physical plate, not from memory or the listing. A single wrong character will stall the title application. Both parties should sign and date the bill of sale, and each should keep a copy.
Using the Bill of Sale to Transfer the Title
The bill of sale is your receipt. The certificate of title is the legal ownership document, and Pennsylvania law requires every trailer used on state roads to be titled. Failing to obtain a title is a summary offense under Section 1101 of the Vehicle Code.1Pennsylvania General Assembly. Pennsylvania Consolidated Statutes Title 75 Section 1101 – Certificate of Title Required
At the sale, the seller signs the title assignment over to the buyer in front of a notary or other authorized official and hands over the physical title.2Pennsylvania General Assembly. Pennsylvania Statutes Title 75 Vehicles Section 1111 – Transfer of Ownership of Vehicle If the trailer is brand new and has never been titled, a Manufacturer’s Certificate of Origin takes the place of a title.
The buyer then has 20 days from the date of the title assignment to apply for a new certificate of title.2Pennsylvania General Assembly. Pennsylvania Statutes Title 75 Vehicles Section 1111 – Transfer of Ownership of Vehicle Which form to use depends on where the trailer is currently titled:
- Already titled in Pennsylvania: Form MV-4ST transfers the existing title into your name.3Pennsylvania Department of Transportation. MV-4ST Fact Sheet
- Titled in another state or never titled: Form MV-1 applies for a first-time Pennsylvania title.4Pennsylvania Department of Transportation. MV-1 Application for Certificate of Title Fact Sheet
The fee to issue a new certificate of title is $72, separate from registration and sales tax.5Commonwealth of Pennsylvania. Payments and Fees A seller who doesn’t sign and deliver the title commits a summary offense carrying a $100 fine for a first violation and $300 to $1,000 for repeat offenses.2Pennsylvania General Assembly. Pennsylvania Statutes Title 75 Vehicles Section 1111 – Transfer of Ownership of Vehicle
Getting the Signatures Notarized
PennDOT requires the seller’s signature on the title to be notarized or verified by an authorized agent. The cleanest approach is for buyer and seller to meet at a notary, tag service, or motor vehicle dealer so the title assignment and the buyer’s application can be signed and witnessed in the same visit.6Commonwealth of Pennsylvania. Buying or Selling a Vehicle Pennsylvania caps notary fees at $5 to $15 per notarial act, depending on the type.
How the Price on the Bill of Sale Sets the Sales Tax
Pennsylvania charges 6% sales tax on trailer purchases, calculated on the purchase price written on the bill of sale. Allegheny County adds 1% for a total of 7%. Philadelphia adds 2% for a total of 8%. Everywhere else in the state, the rate is a flat 6%.7Pennsylvania Department of Revenue. What Is the Motor Vehicle Sales Tax?
One point trips people up. The MV-3 “Verification of Fair Market Value” form does not apply to trailers. PennDOT explicitly exempts trailers from MV-3 requirements.8Pennsylvania Department of Transportation. Motor Vehicle Verification of Fair Market Value by Issuing Agent Even if the price on the bill of sale is well below the trailer’s book value, you won’t be asked to justify it through the MV-3 process the way you would for a car or truck. Your tax is calculated on the number written on the bill of sale.
Gift Transfers
Trailers received as gifts are not subject to Pennsylvania sales tax, as long as either the original purchaser already paid sales tax on the trailer or the trailer was previously exempt.9Pennsylvania Department of Revenue. Are Vehicles Received as Gifts Subject to Sales Tax? You still complete the same title transfer with the same forms. The bill of sale should show plainly that no money changed hands, either by listing the price as “$0” or by writing “gift” in the price field.
Federal gift tax is a separate matter. Gifts worth more than $19,000 per recipient in 2026 require the giver to file IRS Form 709. Most trailer transfers fall well below that threshold, and even those above it rarely result in actual tax owed because the excess simply reduces the giver’s lifetime exemption. The more immediate savings is skipping the 6% to 8% Pennsylvania sales tax, which on a $10,000 trailer runs $600 to $800.
Homemade and Specially Constructed Trailers
If the trailer was built from scratch rather than manufactured under a recognized brand, Pennsylvania classifies it as a “specially constructed vehicle,” and the bill of sale carries more weight than in a normal sale because there’s no manufacturer’s title behind it. The trailer must pass an enhanced vehicle safety inspection at a station certified for that purpose, and the owner submits Form MV-426B along with proof of ownership.10Pennsylvania Department of Transportation. Specially Constructed Vehicle Titling Procedure Fact Sheet
The application goes directly to PennDOT for review; authorized messenger services cannot process specially constructed vehicle titles.10Pennsylvania Department of Transportation. Specially Constructed Vehicle Titling Procedure Fact Sheet You will also need a detailed description of how the trailer was assembled and an unladen weight slip. Once titled, specially constructed trailers with a registered gross weight above 3,000 lbs are subject to periodic safety inspections going forward.
If the Seller Can’t Find the Title
A bill of sale alone will not let you register or title a trailer in Pennsylvania. You need the properly assigned certificate of title. If the seller can’t locate it, they should apply for a duplicate before completing the sale, using Form MV-38O and mailing it to PennDOT with the appropriate fee.11Commonwealth of Pennsylvania. Get a Duplicate Title If there is an outstanding lien, the lienholder uses Form MV-38L instead. As a buyer, walking away from a no-title deal is almost always smarter than trying to sort it out after you’ve paid.