You need documentation to legally establish ownership when buying and registering a new or used trailer in Oklahoma. An Oklahoma trailer bill of sale documents critical information, including:
- Name and address of the seller and buyer
- Notarized buyer and seller signatures
- Trailer description and vehicle identification number (VIN), if available
- Cost of the trailer
- Date of purchase
Since private-use and agricultural trailers need not be titled or registered, a trailer bill of sale in Oklahoma may be the only documentation you have to prove ownership. A notarized bill of sale is how Oklahoma officially recognizes ownership transfers for private and farm trailers  .
Both commercial trailers and travel trailers must be titled and registered in Oklahoma. A bill of sale can facilitate quicker registration by proving ownership and providing essential details about the trailer.
Registering a Trailer in Oklahoma
Although Oklahoma does not require registering your personal use or agricultural trailer, you can do so. Oklahoma will not issue a title if you register these trailers, but they can issue a private trailer or farm trailer license plate.
Personal-use trailers may include boat trailers, utility trailers, and ATV trailers. Other trailers exempt from registration in Oklahoma include converter gears, dollies, jeeps, and boosters. They do not include travel trailers, which must be titled and registered.
On the other hand, commercial trailers must be registered for use in Oklahoma  . Commercial trailers are any trailers used for commercial or business activities. Commercial trailer registrations renew annually, but the plates are non-expiring.
What Paperwork Is Required To Register a Trailer in Oklahoma?
When you register a private or agricultural trailer in Oklahoma, you can do so at your local Oklahoma Tax Commission office. You must provide a trailer bill of sale for Oklahoma and proof of your identity in the form of an Oklahoma driver’s license or state ID.
To register a commercial trailer, you must provide more information, including the following:
- Proof of insurance in Oklahoma
- Vehicle purchase agreement or Oklahoma trailer bill of sale
- Valid driver’s license
- Application for Oklahoma Certificate of Title
- Oklahoma State Tax Permit Number or Federal Employer ID Number (FEIN)
- Tax Form 2290 Schedule 1
Documentation requirements may vary depending on your trailer’s size and vehicle’s combined laden weight. The combined laden weight for a commercial trailer is the maximum combined weight of the vehicle and the load it will carry within the registration period. You must register at a designated title and registration service location.
Trailer Registration Fees
When you register a commercial or travel trailer in Oklahoma, you may pay the following fees:
- Registration fee
- Excise tax
- Vehicle title fee
- Tire tax
- Insurance fee
- Transfer fee
These fees vary depending on the size and laden weight of your trailer.
You will pay a registration fee for personal use and agricultural trailers if you request an optional license plate. Fees will be finalized at the time of registration when you submit your documentation and registration application.
Oklahoma Trailer Bill of Sale Sample
Download an Oklahoma trailer bill of sale template below in PDF or Word format: