IFTA (International Fuel Tax Agreement)
A compact among the lower 48 US states and 10 Canadian provinces that lets interstate carriers report and pay fuel taxes to all member jurisdictions through a single quarterly return filed with their base state. One license and one set of decals replaces per-state fuel permits.
Learn moreWhat is IFTA?
The International Fuel Tax Agreement (IFTA) is a cooperative agreement among the 48 contiguous US states and 10 Canadian provinces that simplifies fuel tax reporting for motor carriers operating across jurisdictions. Before IFTA, an interstate carrier needed fuel permits from every state it crossed; under IFTA, the carrier licenses once with its base jurisdiction, displays IFTA decals on each qualifying vehicle, and files a single quarterly return reporting miles traveled and fuel purchased in each member jurisdiction. The base jurisdiction collects or refunds the net tax and settles with the other members. IFTA generally applies to vehicles used in interstate commerce that exceed 26,000 pounds gross vehicle weight, have three or more axles, or exceed 26,000 pounds in combination. IFTA is administrative rather than safety-related — it does not feed SMS or affect BASIC percentiles — but it is operationally revealing: quarterly filings require disciplined mileage and fuel records (typically ELD-derived today), and a carrier whose IFTA license is revoked for non-filing or non-payment cannot legally operate interstate. IFTA registration is handled at the state level, separate from the FMCSA registration data that CarrierOk indexes; think of it as the fuel-tax leg of the compliance stack alongside UCR fees and the MCS-150 biennial update.
Why does ifta matter?
Insurance Underwriters
IFTA compliance is a back-office discipline signal — a fleet that can't produce clean quarterly fuel-tax filings usually can't produce clean maintenance or driver files either, and IFTA revocation grounds the fleet as effectively as an insurance lapse.
Freight Brokers
An IFTA revocation means the carrier can't legally run interstate even if its FMCSA authority looks active — administrative compliance failures like this often precede the safety and service failures you can see in federal data.
Developers & Platforms
IFTA data lives with state base jurisdictions, not FMCSA — don't expect fuel-tax status in federal carrier APIs. Model interstate operating fitness from the FMCSA-side signals (authority, insurance, BASICs) and treat IFTA as an out-of-band check.
Key values & thresholds
| Category | Value |
|---|---|
| Member Jurisdictions | 48 US states + 10 Canadian provinces |
| Filing Cadence | Quarterly, with base jurisdiction |
| Qualifying Vehicles | > 26,000 lbs GVW or 3+ axles |
| Credential | IFTA license + per-vehicle decals |
Frequently asked questions
Who needs an IFTA license?
A motor carrier needs IFTA if it operates qualifying vehicles in interstate commerce across two or more member jurisdictions. Qualifying vehicles are generally those with a gross vehicle weight over 26,000 pounds, three or more axles regardless of weight, or a combination weight over 26,000 pounds. Carriers that operate only within a single state, or only run vehicles under the thresholds, don't need IFTA. The license is issued by the carrier's base jurisdiction — the state or province where the fleet is registered and operational records are kept.
How does IFTA reporting work?
Each quarter, the carrier files one return with its base jurisdiction reporting total miles traveled and fuel purchased in every member state and province. The return calculates net tax: jurisdictions where the carrier burned more fuel than it bought there are owed tax, and jurisdictions where it bought more than it burned generate credits. The base jurisdiction collects or refunds the net amount and settles with other members. Accurate per-jurisdiction mileage records are essential, which is why most fleets now derive IFTA mileage directly from ELD or telematics data.
Does IFTA affect a carrier's safety scores?
No. IFTA is a fuel-tax administration compact, not a safety program — filings don't feed FMCSA's Safety Measurement System and have no effect on BASIC percentiles or ISS scores. But it matters indirectly: an IFTA license revoked for non-filing or non-payment makes interstate operation illegal regardless of FMCSA authority status, and chronic IFTA problems signal weak back-office controls. Underwriters and brokers screening a carrier should treat IFTA standing as a state-level check that complements the federal-side data in a CarrierOk profile.
Related terms
ELD (Electronic Logging Device)
A device installed in commercial motor vehicles that automatically records driving time and hours of service. ELDs replaced paper logbooks and are mandated by FMCSA for most interstate carriers since December 2019. HOS violations captured by ELDs feed directly into a carrier's BASIC percentile scores tracked by CarrierOk.
MCS-150 (Motor Carrier Identification Report)
A biennial update form that motor carriers must file with FMCSA reporting fleet size, driver count, mileage, cargo types, and contact info. An MCS-150 older than 2 years is a compliance red flag. CarrierOk tracks MCS-150 filing dates and flags stale filings as a risk signal.
UCR (Unified Carrier Registration)
An annual, state-administered fee program that interstate motor carriers, brokers, freight forwarders, and leasing companies must pay to fund state safety enforcement. Fees are set in brackets based on fleet size and change year to year. Lapsed UCR is a common roadside enforcement trigger and an early signal of administrative neglect.
Interstate vs. Intrastate Operation
The jurisdictional line that determines whether a carrier needs federal operating authority and FMCSA insurance filings. Interstate commerce — crossing state lines, or hauling freight that does — triggers federal requirements; intrastate-only carriers answer to their state instead. Vetting logic that demands federal authority from every carrier flags legitimate intrastate operators as failures.
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