Do I need a bill of sale to sell a horse trailer?

Yes. A horse trailer bill of sale documents the private transfer of ownership, records the sale price for tax and registration purposes, and releases the seller from liability after the date of sale. Most states require a signed bill of sale to register or title a trailer purchased from a private seller.

Does a horse trailer have a VIN or a serial number?

Most horse trailers manufactured since 1980 have a standard 17-character VIN stamped on the frame, typically near the tongue or on the driver-side (left) frame rail, as required by federal safety standards. Older trailers, custom-built trailers, and some imported models may have a shorter manufacturer serial number instead. Record whatever is physically stamped on the frame, note whether it is a full VIN or a serial number, and check with your state DMV if the number does not conform to the standard 17-character format.

Do all horse trailers need to be titled?

No. Titling requirements for trailers vary by state and often depend on the trailer's gross vehicle weight rating (GVWR). Many states only require a title for trailers above a specific weight threshold; smaller horse trailers may register without a title. The bill of sale is important either way — it is the primary ownership record for any trailer that does not receive a title, and the tax document for those that do.

What information specific to horse trailers should be on the bill of sale?

In addition to the standard trailer fields (VIN or serial, year, make, model, GVWR, sale price, sale date, buyer and seller information), a horse trailer bill of sale benefits from noting the number of horse stalls, whether the trailer has a living quarters section, the hitch type (gooseneck or bumper pull), and any major equipment included in the sale (mats, hay racks, water tanks).

How is sales tax handled on a private horse trailer sale?

Most states levy use tax on private trailer sales — the buyer typically pays it at registration based on the sale price recorded on the bill of sale. The figure should be accurate and match the actual amount paid. Recording "as-is" language on the bill of sale makes clear the sale price reflects the trailer's condition at time of transfer, not a hypothetical replacement value.

What if I am selling the trailer with livestock inside or as part of a farm sale?

The trailer and any livestock or equipment included in the sale should be documented separately. The bill of sale covers the trailer (as a titled or registerable asset); livestock transfers follow agricultural sale norms and are documented with brand inspection certificates, health certificates, or a separate livestock bill of sale in states that require them. Do not combine trailer and livestock on a single vehicle bill of sale — registration offices will not accept a single document that conflates the two.

Free Horse Trailer Bill of Sale Template

Generate a printable horse trailer bill of sale in minutes. Works for bumper-pull and gooseneck horse trailers, stock trailers, and living-quarters models — captures VIN or serial number, stall count, GVWR, signatures, and instant PDF download. Works in all 50 states.

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Horse trailer specifics: what makes these sales different

Horse trailers change hands through private sales more often than most vehicle types — equine communities rely heavily on word-of-mouth and local classifieds rather than dealerships. That means the paperwork frequently falls on the two parties themselves, without a title office or dealer to guide the process.

A horse trailer bill of sale needs to capture more than a generic trailer form provides. The number of stalls, the hitch type (gooseneck or bumper pull), and any living quarters or included equipment all affect the trailer's value — and they belong in the written record of what was sold. Getting these details into a signed document upfront prevents disagreements about what the sale included.

VIN vs serial number: what to look for on a horse trailer

Federal safety standards require a 17-character VIN on trailers manufactured after 1980 and sold in the US. On a horse trailer, the VIN is typically stamped on:

The left (driver-side) frame rail, near the front of the trailer or toward the center.
The tongue, on a stamped plate or directly on the steel.
A manufacturer certification label on the curbside (right) exterior wall or door frame.

Older trailers — particularly those built before 1981 or custom-built by a farrier, rancher, or small manufacturer — may have a shorter serial number assigned by the builder, or no number at all. Record exactly what is physically present. Note "manufacturer serial only — pre-VIN" or "custom build — no VIN" if applicable. If there is no number, the buyer may need a state-assigned VIN from the DMV before the trailer can be registered.

Livestock, tack, and equipment in the sale

Horse trailers are often sold with attached or stored equipment — rubber mats, hay racks, water tanks, saddle racks, and mangers. These items are part of the trailer and appropriately included in the sale price. List them specifically on the bill of sale so both parties agree on what transfers.

If you are also selling livestock alongside the trailer, document those animals on a separate livestock bill of sale or using the brand inspection and health certificate process your state requires. Do not combine livestock and the trailer on a single vehicle bill of sale — the DMV will not accept a document that mixes the two, and agricultural inspectors have separate requirements.

What to include on a horse trailer bill of sale

VIN or serial number — record exactly what is stamped on the frame; note the type if it is not a standard 17-character VIN.
Year, make, model, and trailer type — horse trailer, stock/combo, or living quarters.
Hitch type — gooseneck or bumper pull.
Number of horse stalls — standard on a trailer-specific form, omitted from generic vehicle forms.
GVWR — from the manufacturer plate; determines whether your state requires a title.
Included equipment — mats, hay racks, water tanks, saddle racks, etc.
Sale price and sale date.
Full legal names and addresses for buyer and seller.
Signatures from both parties — add a notary block if your state requires it for titled trailers.

How to complete a horse trailer bill of sale

Locate the VIN or serial number on the frame near the tongue or driver-side rail, and record it exactly.
Note the year, make, model, trailer type (horse/stock/living quarters), GVWR, and hitch type.
Count and note the number of horse stalls and any included equipment.
Collect full legal names, addresses, and contact details for both buyer and seller.
Agree on the final sale price and sale date, plus any as-is condition language.
Generate the bill of sale, enter all trailer and party details, and review for accuracy.
Both parties sign and date the document, with notary acknowledgement if your state requires it for titled trailers.
Provide the buyer with the signed bill of sale, plus the title or prior registration documents.

Horse trailer bill of sale by state

Open a state-specific horse trailer bill of sale page for any US state to see local titling thresholds, registration office, and a customised template.

Frequently asked questions

Do I need a bill of sale to sell a horse trailer?: Yes. A horse trailer bill of sale documents the private transfer of ownership, records the sale price for tax and registration purposes, and releases the seller from liability after the date of sale. Most states require a signed bill of sale to register or title a trailer purchased from a private seller.
Does a horse trailer have a VIN or a serial number?: Most horse trailers manufactured since 1980 have a standard 17-character VIN stamped on the frame, typically near the tongue or on the driver-side (left) frame rail, as required by federal safety standards. Older trailers, custom-built trailers, and some imported models may have a shorter manufacturer serial number instead. Record whatever is physically stamped on the frame, note whether it is a full VIN or a serial number, and check with your state DMV if the number does not conform to the standard 17-character format.
Do all horse trailers need to be titled?: No. Titling requirements for trailers vary by state and often depend on the trailer's gross vehicle weight rating (GVWR). Many states only require a title for trailers above a specific weight threshold; smaller horse trailers may register without a title. The bill of sale is important either way — it is the primary ownership record for any trailer that does not receive a title, and the tax document for those that do.
What information specific to horse trailers should be on the bill of sale?: In addition to the standard trailer fields (VIN or serial, year, make, model, GVWR, sale price, sale date, buyer and seller information), a horse trailer bill of sale benefits from noting the number of horse stalls, whether the trailer has a living quarters section, the hitch type (gooseneck or bumper pull), and any major equipment included in the sale (mats, hay racks, water tanks).
How is sales tax handled on a private horse trailer sale?: Most states levy use tax on private trailer sales — the buyer typically pays it at registration based on the sale price recorded on the bill of sale. The figure should be accurate and match the actual amount paid. Recording "as-is" language on the bill of sale makes clear the sale price reflects the trailer's condition at time of transfer, not a hypothetical replacement value.
What if I am selling the trailer with livestock inside or as part of a farm sale?: The trailer and any livestock or equipment included in the sale should be documented separately. The bill of sale covers the trailer (as a titled or registerable asset); livestock transfers follow agricultural sale norms and are documented with brand inspection certificates, health certificates, or a separate livestock bill of sale in states that require them. Do not combine trailer and livestock on a single vehicle bill of sale — registration offices will not accept a single document that conflates the two.

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