Interstate tax for commercial vehicles is not one tax but four overlapping obligations: the International Fuel Tax Agreement (IFTA) for fuel taxes, the International Registration Plan (IRP) for apportioned plates, the federal Heavy Vehicle Use Tax filed on IRS Form 2290, and the annual Unified Carrier Registration (UCR). Once a qualifying vehicle crosses a state line for commercial purposes, all four apply, and most are handled through a single base jurisdiction where your carrier is established.
Which Vehicles Are Covered
The trigger is weight and axles, not revenue or cargo. A vehicle is in if it meets any one of three tests: two axles with a gross or registered gross weight above 26,000 pounds, three or more axles regardless of weight, or use in a combination whose total weight exceeds 26,000 pounds.1International Fuel Tax Association. Carrier Information Meeting any one test pulls you into both IFTA and IRP at the same time.
Some vehicles that hit the weight threshold are still exempt in certain jurisdictions. Recreational vehicles, government-owned vehicles, and school buses are exempt in some but not all IFTA and IRP member jurisdictions. Farm-plated vehicles receive exemptions in roughly a dozen states under varying conditions.2IFTA, Inc. IFTA Vehicle Exemptions Confirm with your base jurisdiction before assuming coverage.
Base Jurisdiction and Federal Numbers
Your base jurisdiction is the state or province where you file IFTA returns, pay IRP fees, and keep your records. To claim one, you need an established place of business there, vehicles that accumulate mileage there, and accessible fleet records there. Without a physical office in any jurisdiction, you can designate a state where you can show residency through a driver’s license, income tax filings, or property ownership.
The choice matters. Your base state runs your IFTA and IRP paperwork, collects the fees up front, and redistributes revenue to the other states you drove in. A slow filing system or clunky portal becomes your problem for the duration.
You also need a USDOT number from the Federal Motor Carrier Safety Administration; it is your company’s unique safety identifier across federal and state systems.3Federal Motor Carrier Safety Administration. Do I Need a USDOT Number Carriers that haul regulated commodities for hire or move passengers across state lines also need operating authority, commonly called an MC number. That is separate from the USDOT number. Private carriers hauling their own goods, and carriers moving only exempt commodities, do not need one.4Federal Motor Carrier Safety Administration. Get Operating Authority (Docket Number) Owner-operators often miss this distinction.
IFTA: The Quarterly Fuel Tax
IFTA replaces per-state fuel permits with a single quarterly return filed through your base jurisdiction. You report every mile driven and every gallon purchased across all member jurisdictions, and your base state settles up with the others.
The calculation runs in two steps. Divide total fleet miles by total gallons purchased that quarter to get fleet miles per gallon. For each state, divide the miles driven there by that MPG to get taxable gallons, then compare taxable gallons against tax-paid gallons bought in that state. Burn more than you bought and you owe the difference at that state’s rate; buy more than you burned and you get a credit. Credits above $20 can be refunded on request or carried forward for up to eight quarters.
Returns are due on the last day of the month after each quarter closes: April 30, July 31, October 31, and January 31. If the date falls on a weekend or holiday, the next business day applies. A late return draws a penalty of $50 or 10 percent of the net tax due, whichever is greater, plus interest on any unpaid balance. Zero-activity quarters still require a filed return to keep your IFTA license active.
IRP: Apportioned Registration
The International Registration Plan handles vehicle registration the way IFTA handles fuel tax. You pay a single apportioned fee through your base jurisdiction rather than buying plates in every state. Each state’s share is a percentage of its full registration fee, based on the share of total fleet miles driven there.5International Registration Plan, Inc. International Registration Plan, Inc.
If 30 percent of your fleet mileage was in a given state, you pay 30 percent of that state’s full fee. Your base jurisdiction calculates the split, collects the total, and distributes each state’s share. What you get back is a cab card listing every state you are authorized to operate in and the registered weight for each.
New carriers without a mileage history usually start with the IRP’s equalized mileage formula, which spreads distance evenly across the jurisdictions you plan to enter. Actual mileage takes over in later years, and your fees shift to match where you actually run.
Federal Heavy Vehicle Use Tax (Form 2290)
On top of the state systems, the federal government levies an annual Heavy Vehicle Use Tax on vehicles with a taxable gross weight of 55,000 pounds or more.6Office of the Law Revision Counsel. 26 USC 4481 – Imposition of Tax It is filed on IRS Form 2290 and requires an Employer Identification Number and the VIN for each taxable vehicle.7Internal Revenue Service. E-file Form 2290
Rates
The tax starts at $100 for vehicles at exactly 55,000 pounds and rises by $22 for each additional 1,000 pounds (or fraction of 1,000) above that floor, capping at $550 for vehicles over 75,000 pounds. Logging vehicles pay 75 percent of the standard amount.6Office of the Law Revision Counsel. 26 USC 4481 – Imposition of Tax Reference points from the 2025–2026 rate table:
- 55,000 lbs: $100 per year ($75 logging)
- 65,000 lbs: $320 per year ($240 logging)
- 75,000 lbs: $540 per year ($405 logging)
- Over 75,000 lbs: $550 per year ($412.50 logging)
Deadlines and Schedule 1
The HVUT tax year runs July 1 through June 30. Vehicles already in service at the start of the period must be reported by the end of August. Vehicles placed in service later are due by the last day of the month following first use; a truck first driven on public highways in October, for example, requires a Form 2290 filed by November 30, with the tax prorated.8Internal Revenue Service. Instructions for Form 2290 – Heavy Highway Vehicle Use Tax Return
When you pay, the IRS issues a stamped Schedule 1 as proof of filing. State motor vehicle offices will refuse to register or renew plates for any vehicle at 55,000 pounds or more without a current stamped Schedule 1.8Internal Revenue Service. Instructions for Form 2290 – Heavy Highway Vehicle Use Tax Return
Mileage Suspension
Vehicles that travel 5,000 miles or less on public highways during the tax year can claim a suspension. Agricultural vehicles get a 7,500-mile threshold. The suspension does not exempt you from filing; you still submit Form 2290 and report the vehicle as suspended (category W) to receive your stamped Schedule 1. If the vehicle later exceeds the mileage limit, the full tax becomes due from the month the vehicle was first used that period, and you must file an amended return by the end of the following month.9Internal Revenue Service. Instructions for Form 2290 (07/2025)
Unified Carrier Registration
UCR is a separate annual fee required of all interstate motor carriers, freight forwarders, brokers, and leasing companies under federal law.10Office of the Law Revision Counsel. 49 USC 14504a – Unified Carrier Registration System Plan and Agreement The fee scales with fleet size and is paid to your base state. For the 2026 registration year:11Unified Carrier Registration Plan. Fee Brackets
- 0–2 vehicles: $46
- 3–5 vehicles: $138
- 6–20 vehicles: $276
- 21–100 vehicles: $963
- 101–1,000 vehicles: $4,592
- 1,001+ vehicles: $44,836
Brokers and leasing companies pay the lowest bracket ($46) regardless of size. Registration opens each year on October 1 for the following year, and enforcement begins January 1. Unlike IFTA and IRP, UCR involves no mileage reporting or quarterly filings, but skipping it can bring fines at roadside inspections or compliance reviews.
Recordkeeping
IFTA compliance turns on two record types: distance logs and fuel receipts. Both must be kept for at least four years from the date the related return was due or filed, whichever is later.
Every trip requires an Individual Vehicle Distance Record showing date, origin and destination, route, and odometer readings at each state border. Carriers using GPS or telematics must log a reading at least every 10 minutes while the engine is running. Each reading needs a timestamp, latitude and longitude to four decimal places, and an odometer value from the engine control module, and the data must be exportable in a spreadsheet format like CSV or Excel. A PDF screenshot of a map will not pass an audit.12Department of Transportation. IFTA Record Keeping Requirements
One trap: buying an electronic logging device does not automatically make your distance records IFTA-compliant. IFTA has no certification program for ELDs, so a device that meets hours-of-service rules can still produce mileage data that fails IFTA formatting. Confirm your system’s output matches the specifications before relying on it in an audit.
Every fuel receipt must show date, gallons, fuel type, vendor name and address, and a vehicle identifier or unit number. Receipts missing any of these can be disqualified in a compliance review, which costs you the credit for taxes already paid on that fuel. Fleet fuel cards usually capture this automatically, but the carrier is still on the hook for accuracy. Sorting receipts by quarter and reconciling them against distance records before you file saves work later.
Temporary Permits for Occasional Trips
Not every interstate trip needs full IFTA and IRP registration. Most jurisdictions sell temporary trip permits that cover a single entry into a state for a limited period and substitute for both fuel tax and registration credentials on a per-trip basis. Each state you enter needs its own permit, and a round trip counts as two entries.
These permits fit a carrier crossing a state line a handful of times a year, or one operating while a full IFTA or IRP application processes. For regular interstate work, the per-trip cost and the hassle of buying permits in every state quickly outrun the effort of maintaining IFTA and IRP accounts.
What Non-Compliance Costs
Operating without valid IFTA decals, a current cab card, or UCR registration is a problem at every weigh station. Consequences range from having to buy a fuel trip permit on the spot to citations and fines. In aggressive enforcement states, authorities can seize the vehicle and hold it until back taxes, penalties, interest, and storage costs are paid.
The federal PRISM system adds another layer. PRISM links vehicle registration databases to FMCSA safety records, so a carrier under a federal out-of-service order can be flagged when they try to register or renew a vehicle in a participating state. State offices can deny, suspend, or revoke the registration, and roadside officers can use PRISM tools to identify and immobilize the vehicle.13Federal Motor Carrier Safety Administration. Performance and Registration Information Systems Management (PRISM)
Lapses compound. A missed IFTA return leads to a suspended license, which means invalid decals, which means a citation at the next scale, which means a permit bought under pressure at a premium. Staying current on every quarterly deadline and annual renewal is far cheaper than climbing out.