IFTA and IRP: The Two Registrations Everyone Confuses
One puts a plate on the truck. The other keeps a state from billing you for fuel tax you already paid. New carriers mix them up constantly — and audits find it.
By Day One Authority · Updated
The short answer
- IRP = apportioned registration (the plate). IFTA = quarterly fuel tax reconciliation.
- Both apply to interstate vehicles over 26,000 lbs GVW or with three or more axles.
- You apply for both through your base-state agency, not the FMCSA.
- IFTA returns are due quarterly even in a quarter where you ran zero miles.
- Keep per-trip mileage by jurisdiction and every fuel receipt for four years.
These two programs exist for the same reason: a truck consumes road in states where it is not registered and buys fuel in states where it did not drive most of its miles. IRP apportions your registration fees across the jurisdictions you travel. IFTA reconciles fuel taxes so each state gets tax on the fuel actually burned inside it. They are administered by your base state and have nothing to do with your operating authority.
| IRP | IFTA | |
|---|---|---|
| What it is | Apportioned vehicle registration | Fuel use tax license |
| What you get | Apportioned plate + cab card | License + two decals per truck |
| Fees based on | Estimated distance per jurisdiction | Fuel burned vs fuel purchased |
| Filing cadence | Annual renewal | Quarterly return |
| Typical first-year cost | $500–$2,500+ per truck | $0–$50 license, tax varies |
| Audit focus | Distance records | Mileage + fuel receipts |
Who is actually required to register
If you operate a power unit across state lines with a gross vehicle weight over 26,000 pounds, or with three or more axles regardless of weight, you need both. A straight truck under 26,001 lbs running interstate typically needs neither, though it still needs authority and insurance. Intrastate-only carriers register with their home state instead.
Getting apportioned plates the first time
IRP application
- 1
Establish your base state
You need an established place of business in the state: a physical address, records maintained there, and at least one employee. Mailbox-only setups get denied.
- 2
Estimate distance by jurisdiction
First-year applicants use the base state average distance chart or their own good-faith estimates. Track actual miles from day one — renewal uses real data.
- 3
Submit the schedules with proof
Title or lease, proof of insurance, USDOT number, Form 2290 receipt if the truck is over 55,000 lbs, and your Schedule A/B vehicle list.
- 4
Pay and receive the cab card
The cab card lists every jurisdiction you are registered in and the weight allowed. It must stay in the truck. Running into a jurisdiction not on the card requires a trip permit.
How the IFTA quarter really works
Each quarter you report total miles by jurisdiction and total gallons purchased by jurisdiction. IFTA computes your fleet MPG, calculates tax owed per state based on miles driven there, credits the tax you already paid at the pump in each state, and nets it out. You either owe a small amount or receive a credit. Buying all your fuel in a low-tax state does not save you money — it just moves the payment from the pump to the return.
- Q1 (Jan–Mar) due April 30
- Q2 (Apr–Jun) due July 31
- Q3 (Jul–Sep) due October 31
- Q4 (Oct–Dec) due January 31
Records that survive an audit
Auditors want to reconstruct each trip: date, route, beginning and ending odometer, total trip miles, miles per jurisdiction, and every fuel purchase with a receipt showing date, seller, gallons, and unit number. Almost every modern ELD produces IFTA-ready state mileage reports automatically — that is one of the strongest arguments for choosing your ELD carefully rather than buying the cheapest one.