A trip permit is a short-term authorization that lets a vehicle travel legally on public roads when it does not have the permanent registration or fuel tax credentials required for the jurisdictions it enters. Commercial carriers crossing state lines without full International Registration Plan (IRP) or International Fuel Tax Agreement (IFTA) credentials are the most common buyers, but private vehicle owners use them too, usually after buying a car out of state or while waiting on permanent plates. The permit fills the gap between no authorization and full credentials, and skipping it can mean roadside fines, forced emergency purchases, and a stopped trip.
When You Need One
The most frequent scenario involves a commercial truck or bus entering a state where it is not registered. Under the IRP, commercial motor vehicles traveling in two or more member jurisdictions are supposed to carry apportioned registration covering every state on their routes. When a carrier hasn’t added a particular state to its apportioned registration, or hasn’t registered under IRP at all, a trip permit is the legal alternative that keeps the vehicle moving.
Private owners run into the requirement less often, but the situations are familiar. You buy a vehicle in another state and need to drive it home before you can register it. Your registration expires while you’re away from your home state. You need to move an unregistered vehicle to a repair shop or an inspection station. Most states offer some form of temporary permit for these situations, though names and durations vary.
Commercial carriers also face a parallel obligation on fuel tax. A qualifying motor vehicle operating in two or more IFTA member jurisdictions must either hold an IFTA license or buy a fuel trip permit for each outside jurisdiction it enters. IRP and IFTA use the same vehicle thresholds, generally built around a gross weight above 26,000 pounds or three or more axles, but they cover different obligations: registration on one side, fuel tax on the other. A single trip across a state line can trigger both.
The Main Types of Trip Permits
IRP Registration Trip Permits
Any IRP member jurisdiction can issue a trip permit for a vehicle or combination in lieu of apportioned or full registration. The permit allows both interstate and intrastate operation within the issuing jurisdiction for a set period, almost always 72 hours. Each jurisdiction decides the form and process, so the mechanics differ from state to state even though the underlying authority is the same.
A carrier effectively has three choices under the IRP: a trip permit for occasional travel, full registration in a single state, or apportioned registration across multiple states. Trip permits make sense when a vehicle enters a given jurisdiction only a handful of times a year. Once the trips become routine, apportioned registration is both cheaper and simpler.
IFTA Fuel Tax Trip Permits
A fuel trip permit satisfies a carrier’s fuel tax obligation for a single trip into a jurisdiction where it does not hold IFTA credentials. Carriers who cross state lines regularly almost always find a full IFTA license more practical, but a fuel trip permit works for one-off or infrequent trips. If your rig is also outside its IRP coverage for the same trip, you need both permits.
Temporary Registration Permits for Private Vehicles
Most states issue some version of a temporary registration or transit permit for personal vehicles. The common thread is a short window, often 30 days or less, to get a newly purchased, recently moved, or unregistered vehicle to its destination or through the registration process. They go by different names depending on the state: temporary tags, transit permits, in-transit plates, or temporary non-resident registrations. Some are non-renewable, so you get one shot at the permitted duration.
One boundary worth flagging: vehicles or loads that exceed standard size or weight limits need a separate oversize or overweight permit with its own rules on routes, escorts, and time-of-day restrictions. Some states loosely call these “trip permits,” but they are a distinct category and do not substitute for an IRP or IFTA permit when those are also required.
How Long a Trip Permit Lasts
Commercial IRP trip permits almost universally run 72 hours from the time of purchase, though some jurisdictions offer a 144-hour option at a higher fee. The clock starts immediately upon issuance, not when the vehicle crosses the state line, so buying days in advance eats into the window. A few jurisdictions issue single-trip permits tied to a specific origin and destination rather than a time window, but 72 hours is the standard.
Temporary registration permits for private vehicles typically run longer. The duration depends on the issuing state and the purpose. A permit for driving a newly purchased car home may last 30 days, while a permit to move an uninspected vehicle to a shop may be valid for a single trip on a specified route.
What You Need to Apply, and What It Costs
For a commercial IRP or IFTA trip permit, expect to provide the vehicle identification number (VIN) along with the year, make, and model; the carrier’s USDOT number; the registered gross vehicle weight or combined gross weight; your base jurisdiction and any existing IRP or IFTA credentials; the origin and destination of the trip; and proof of insurance.
For a personal temporary registration permit, you will generally need the VIN, proof of ownership or a bill of sale, proof of insurance, your driver’s license, and the intended destination. Some states require a completed safety inspection before issuing even a temporary permit; others issue the permit specifically so you can drive to the inspection station.
Commercial trip permits can be purchased online through a state’s IRP office, by phone, or through third-party permit services that handle multiple jurisdictions at once. Online orders typically produce a printable permit instantly. Costs commonly fall in the $25 to $50 range for a 72-hour commercial permit, with 144-hour permits priced higher. Temporary fuel tax permits land in a similar range. Temporary registration permits for private vehicles tend to be cheaper, often under $25, and dealerships usually handle temporary tags at the point of sale when you buy a car.
What Happens If You Drive Without One
Enforcement officers at weigh stations and during roadside inspections check for proper IRP registration and IFTA credentials. Getting caught without them is not a warning-and-wave situation. Penalties vary by state but commonly include a fine calculated by vehicle weight, a required purchase of an emergency permit on the spot at a premium price, or both. Some states assess penalties per pound of vehicle weight above a threshold, which climbs quickly on a loaded tractor-trailer. The vehicle can be held until the situation is resolved.
For IFTA violations, a carrier caught without a license or without displaying IFTA decals may be required to buy an emergency fuel permit and pay an additional penalty. The combined cost typically runs well above what a trip permit would have cost, and repeated violations invite closer scrutiny from enforcement agencies going forward.
Private vehicle owners driving without valid registration or a temporary permit face traffic citations, possible towing, and impound fees. The ticket itself may be modest, but the tow and storage charges can dwarf it.
Keeping the Permit in the Vehicle
A trip permit is only useful if it is in the cab. The permit or a copy must be in the vehicle and available for inspection at any time during the trip. For IRP-registered vehicles, the cab card normally serves this purpose, and a trip permit replaces that cab card for the jurisdictions it covers. Carriers with IFTA credentials must display decals on each qualifying vehicle in addition to carrying the cab card; when operating on a fuel trip permit instead, the permit itself takes the place of those credentials during the permitted period.
Print the permit immediately after purchase and keep it with your other registration documents. Some enforcement officers will accept an electronic copy on a phone or tablet, but not every jurisdiction has caught up to that practice, so a paper copy remains the safer bet.