Three programs, three agencies, three deadlines, and a single truck sitting under all of them. They get confused constantly — partly because two of them share an identical weight test, and partly because the same DMV counter often handles two of the three.
Quick answer: IRP apportions your registration fees among jurisdictions by the distance you drove in each — it asks where did the truck go? IFTA settles fuel tax between jurisdictions based on where fuel was burned versus where it was bought — it asks where did the fuel go? Form 2290 is a flat federal excise tax paid to the IRS on vehicles at 55,000 pounds or more — it asks only how heavy is it? An 80,000-pound interstate tractor owes all three. Paying one does not touch the others, and the Plan says so explicitly.
Side by side
| IRP | IFTA | Form 2290 (HVUT) | |
|---|---|---|---|
| What it does | Apportions registration fees by distance in each jurisdiction | Settles fuel use tax by where fuel was consumed vs purchased | Flat federal excise tax on heavy highway use |
| Nature | Fee apportionment, not a tax | Tax collection and redistribution | Federal excise tax |
| You deal with | Your base jurisdiction DMV or DOT | Your base jurisdiction | The IRS |
| Members | 59 — 48 contiguous states + DC + 10 Canadian provinces | 58 — 48 states + 10 Canadian provinces (no DC) | Federal — all US public highways |
| Threshold | Power unit over 26,000 lb, or 3+ axles regardless of weight, or combination over 26,000 lb — used in 2+ member jurisdictions | The same three-part test, operating in 2+ member jurisdictions | Taxable gross weight 55,000 lb or more |
| Cycle | Annual registration year; distance reported for July 1 – June 30 preceding | Licence runs the calendar year to Dec 31; returns quarterly | Annual tax period July 1 – June 30 |
| Deadline | Set by base jurisdiction, often staggered | Last day of the month after each quarter | Aug 31 for July-use vehicles; otherwise last day of the month after first use |
| Credential | Apportioned plate + cab card | IFTA licence + two decals per vehicle | Stamped Schedule 1 |
Why IRP and IFTA feel like one thing
Because structurally they nearly are. Compare the qualifying-vehicle tests. IRP’s “apportionable vehicle” is a power unit with two axles and a gross weight in excess of 26,000 pounds, or three or more axles regardless of weight, or used in combination over 26,000 pounds. IFTA’s “qualified motor vehicle,” at section R245 of its Articles of Agreement, is a vehicle with two axles and a gross weight “exceeding 26,000 pounds,” or three or more axles regardless of weight, or used in combination over 26,000 pounds.
Same three limbs, same number. And IFTA’s definition of base jurisdiction is explicitly anchored to the registration one — “the member jurisdiction where qualified motor vehicles are based for vehicle registration purposes.” That is the structural reason states co-locate the two offices and publish a single combined IRP and IFTA manual, as Vermont and Pennsylvania both do.
They are not identical, though, and three differences are worth knowing:
- Membership. 59 versus 58. The District of Columbia is a full IRP member but is not among IFTA’s “48 U.S. states and 10 Canadian provinces.”
- Exclusions. IRP excludes recreational vehicles, restricted-plate vehicles and government-owned vehicles. IFTA’s R245 excludes only recreational vehicles, though individual jurisdictions may add their own.
- Passengers. IRP covers transport of persons “for hire”; IFTA says simply “persons,” which is slightly broader.
What each one is actually asking
The cleanest way to keep them apart is to notice that each asks a different question about the same truck.
IRP asks where the truck went. It takes your distance in each jurisdiction, turns it into a percentage, and bills you that share of each jurisdiction’s registration fee. Details on how that calculation works.
IFTA asks where the fuel went. You buy diesel in one state and burn it in another; the tax should belong to the state whose road surface you used. IFTA reconciles that quarterly, moving money between jurisdictions so the tax follows consumption rather than the pump. You file a return every quarter even if you ran nothing — the Articles of Agreement are explicit that returns are required “even if no operations were conducted or no taxable fuel was used.”
Form 2290 asks only how heavy the vehicle is. At a taxable gross weight of 55,000 pounds or more, the federal Heavy Vehicle Use Tax is due to the IRS. There is no apportionment, no distance split, and no state involvement in the tax itself — a state’s only role is to check that you paid it.
So the same truck can run every mile in one state and still owe IFTA money to that state, owe nearly all its IRP fees there, and owe the IRS a flat $550 regardless of either.
The thresholds do not line up, and that trips people
IRP and IFTA both start at a power unit over 26,000 pounds or three axles. Form 2290 starts at 55,000 pounds taxable gross weight. The gap between those numbers is where most of the confusion lives.
- A three-axle straight truck at 30,000 pounds running interstate needs IRP and IFTA, and owes no Form 2290.
- A 60,000-pound tractor that never leaves its home state owes Form 2290 and needs neither IRP nor IFTA — both require operation in two or more member jurisdictions.
- An 80,000-pound tractor running interstate is caught by all three.
Note also what 55,000 pounds means for Form 2290: taxable gross weight, which includes the unloaded weight of the truck, the trailers customarily used with it, and the maximum load customarily carried. It is not the truck’s empty weight. See how states draw the weight line for where state rules diverge from the federal one.
None of them substitutes for another
This is not an inference — the Plan lists it. Apportioned registration does not “waive or replace the requirements of the International Fuel Tax Agreement (IFTA),” does not “waive or exempt the payment or reporting of the Federal Heavy Vehicle Use Tax (Form 2290),” and does not waive operating authority, insurance filings, size and weight limits, or any other tax.
If anything, the programs are wired to each other in the opposite direction: you cannot finish your IRP registration without proving you paid your 2290. Wyoming lists IRS Form 2290 among the required vehicle-level documents on an IRP application and asks for a copy of the watermarked or stamped return. Every state does some version of this check — our state-by-state guide records exactly what each one accepts, and using your Schedule 1 at the DMV covers what to bring.
And a fourth one most guides forget: UCR
Unified Carrier Registration is a separate obligation that state IRP manuals routinely cover because carriers keep missing it. It requires interstate motor carriers — for-hire, private and exempt — plus leasing companies, freight forwarders and brokers to register and pay an annual fee banded by fleet size. It counts power units only; trailers no longer factor into the fleet-size calculation.
It does not apply to wholly intrastate operations. And note a quirk: being based in a state that does not participate in UCR does not exempt you — you register through a participating state instead.
A practical sequence for a new interstate carrier
- Get your EIN early — a new one takes weeks to become usable for e-filing, and this is the most common cause of a last-minute failure.
- Get your USDOT number and operating authority.
- File Form 2290 and get your stamped Schedule 1 back.
- Take that Schedule 1 to your base jurisdiction’s IRP office with the rest of the application.
- Open your IFTA account and get your licence and decals.
- Register for UCR.
The order matters at step 3 and 4: arriving at the IRP counter without the Schedule 1 is one of the most common reasons an application is returned rather than processed.
Frequently asked questions
What is the difference between IRP and IFTA?
IRP apportions your registration fees by the distance you drove in each jurisdiction. IFTA settles fuel tax based on where fuel was consumed versus where it was bought. Same qualifying vehicle test, completely different money.
Does IRP include IFTA?
No. The Plan states directly that apportioned registration does not waive or replace IFTA requirements. They are separate accounts with separate filings, even when the same office handles both.
Do I need IFTA if I have apportioned plates?
Almost certainly yes. If your vehicle qualifies for IRP and runs in two or more IFTA member jurisdictions, it qualifies for IFTA too — the vehicle tests are effectively the same.
Is Form 2290 a state tax?
No. It is federal, paid to the IRS. Your state DMV only checks the stamped Schedule 1 before registering the vehicle.
Why does IRP have 59 members and IFTA 58?
The District of Columbia. It is a full IRP member jurisdiction, but IFTA membership is the 48 states and 10 Canadian provinces.
Do I file IFTA annually like my 2290?
No — quarterly, due the last day of the month following each quarter, and required even for a quarter with no operations. A narrow annual option exists for licensees running under 5,000 miles outside their base jurisdiction.
My truck is over 26,000 pounds. Do I owe Form 2290?
Not on that basis. 26,000 pounds is the IRP and IFTA threshold. Form 2290 begins at a taxable gross weight of 55,000 pounds or more.
Related: What is IRP · How IRP fees are calculated · What is Form 2290 · Glossary
General information, not tax or legal advice — we may make errors. The IRS is the authority on Form 2290; your base jurisdiction is authoritative on IRP and IFTA. Drawn from the IFTA Articles of Agreement (2026 edition), PennDOT PUB 181 (3-25), the Wyoming DOT apportioned plates manual (rev. 10/2024), the California DMV IRP Handbook, and the Idaho State Tax Commission on IFTA membership; federal details from the Instructions for Form 2290 (Rev. July 2026) and the IRS Trucking Tax Center. See our disclaimer.