Cypress handles IFTA quarterly filings for our customers. This guide explains what IFTA is, what it costs to get wrong, and what we look for when we file it — not a DIY walkthrough.

What IFTA actually is

The International Fuel Tax Agreement is a multi-jurisdictional revenue-sharing agreement between the 48 contiguous U.S. states, the District of Columbia, and 10 Canadian provinces. Its purpose is to solve a structural problem in interstate trucking: a commercial truck buys fuel in one state and pays that state's per-gallon excise tax at the pump, but actually consumes the fuel driving through many states. Without IFTA, each state would either have to be made whole at every state line — operationally impossible — or would have to chase carriers individually for the share of fuel tax owed for miles driven within their borders.

IFTA solves this with a quarterly reconciliation. Every IFTA-licensed carrier reports, by jurisdiction, the miles driven in that jurisdiction and the gallons of fuel purchased in that jurisdiction. The system then calculates, by jurisdiction, the tax owed (jurisdiction miles divided by fleet MPG, times jurisdiction tax rate) and credits what was already paid (gallons purchased in the jurisdiction times that jurisdiction's rate). The net — owed to the base state or refunded — is what the carrier files and pays.

The license is keyed to the carrier's base state, which is generally the carrier's principal place of business. IFTA decals are issued for each qualifying vehicle and must be displayed on the truck. A truck operating in interstate commerce without IFTA decals (and without a single-trip permit) is technically operating illegally and can be cited and detained at roadside.

Why getting it right from day one matters

The IFTA audit window is four years. That means a return you file today can be audited in 2030, and the carrier is expected to produce the source documents — trip records, fuel receipts, mileage data — to substantiate every line on the return. Carriers who treat the early quarters casually build a documentary record that will not survive an audit, and the audit assessment can be material because the auditor will extrapolate sample-quarter problems across years.

Beyond the audit exposure, IFTA non-filing has cascading operational consequences. A carrier that stops filing IFTA quarters has the IFTA license suspended. IFTA license suspension typically triggers IRP suspension in most jurisdictions, because the same base state runs both and the systems share status. IRP suspension means the apportioned plate goes inactive. Inactive plate means the truck is parked.

What a clean IFTA practice looks like

When Cypress runs IFTA for a customer, we look for these markers:

  • ELD-sourced per-jurisdiction mileage. ELDs natively produce per-jurisdiction breakdowns that are reliable for tax reporting, unlike fuel-card or summary mileage.
  • Fuel receipts retained for every diesel purchase across the quarter. Source documents in a retrievable form, not just summary totals from a card company.
  • Total per-jurisdiction miles reconciled to odometer. Mileage gaps indicate missing trip records that the audit will surface.
  • Current-quarter rate matrix applied. IFTA jurisdiction tax rates change quarterly and using last quarter's rates produces filings that do not match.
  • Filed by the quarterly deadline with confirmation retained for four years. The retention window is what protects against audit assessment.
  • Decals current and visible on each qualifying vehicle.

Where this goes wrong

The two failure modes that account for most IFTA problems: reliance on fuel-card mileage estimates instead of ELD per-jurisdiction breakdowns, which produces filings that do not survive audit sampling. And calendar drift — the carrier files Q1 and Q2 on time, gets busy, files Q3 late, and either files Q4 even later or skips it entirely. Chronic late or missed quarters are the trigger for license-status review.

A subtler failure mode is the base-state mismatch: a carrier whose IRP is based in one state but whose IFTA was filed in another. The two systems eventually catch the inconsistency, and the cleanup is more expensive than the original filing would have been if done correctly.

How Cypress handles this

Cypress runs IFTA for our customers as a continuous operation, not four separate quarterly scrambles. The customer's ELD data flows into our system on a rolling basis, fuel receipts are captured and retained, the per-jurisdiction mileage is reconciled to odometer in real time, and the quarterly filing is prepared, filed directly with the base-state portal, and confirmed before the deadline. The four-year audit retention is run by us, in the customer's name.

IFTA lives on the same compliance calendar as MCS-150, UCR, BOC-3, and IRP — one calendar, one operation, one place to look. The direct-build advantage matters: filings go directly to the base state's IFTA system. No aggregator markup, and the carrier's jurisdiction-by-jurisdiction operating data does not flow through a third party.

Get this done

If you would rather have IFTA quarters, IRP, and the rest of your annual compliance handled as one operation, Cypress Authority Services is the sister brand that runs that work for Dispatch Rail customers.

Cypress Authority Services is a sister brand operated by the same team that runs Dispatch Rail.