Buying Exempt for an IRP Fleet

You might be able to buy or lease motor vehicles, trailers, and glider-kit vehicles for your IRP fleet tax free if all the following apply:

  • You’re a commercial or private carrier in the business of transporting one or more of the following:
    • People
    • Commodities you or someone else owns
  • You’ll operate the motor vehicle, glider-kit vehicle or trailer in an IRP fleet substantially used in interstate commerce.
    “Substantially used in interstate commerce” means a fleet that has at least 10 percent of its accrued mileage outside of Idaho in any reporting period. The IRP’s reporting period begins July 1 and ends June 30.
  • You complete pdf Form ST-104IC – Sales Tax Exemption Certificate – Interstate Commerce Vehicles, and give it to the dealer, retailer or county assessor (or DMV).

Buying motor vehicles exempt

  • The motor vehicle must be over 26,000 maximum gross weight, and you must immediately register it in an IRP fleet.
  • You can title or base plate the vehicle in any state.
  • You must register a leased vehicle in your business’ name.

Farm vehicles or noncommercial vehicles as defined by Idaho Code section 49-123 don’t qualify for the exemption.

Buying trailers exempt

  • You must register a rented or leased trailer in your business’ name.
  • You must place the trailer in an IRP fleet.

Buying glider kits exempt

  • You must have someone use the glider kit to assemble a glider-kit vehicle*.
  • You must immediately register the glider-kit vehicle in an IRP fleet.

* A “glider-kit vehicle” means every large truck created from a kit that a manufacturer of large trucks makes. The glider-kit vehicle is a new truck chassis, special-ordered from the factory, without engine or transmission. You have someone install a remanufactured engine and transmission into the chassis.

You might qualify for an International Fuel Tax Agreement (IFTA) license if you’re an IRP registrant. The license allows you to reduce paperwork and standardize fuels use tax reporting. See IFTA Licensees.