Trucking compliance in Idaho

UCR in Idaho

Idaho participates in the Unified Carrier Registration Agreement, which makes it the base state for any interstate carrier, broker, freight forwarder or leasing company whose principal place of business is here. You register once a year, through the national UCR system, and the fee is the same six-bracket federal schedule used everywhere: $55 for 0–2 vehicles, $167 for 3–5 and $333 for 6–20 in the 2027 registration year, rising to $54,165 above 1,000. The fee is set by federal rule (49 CFR 367), so it is the same whichever state you register through; what Idaho adds is enforcement — roadside officers in a participating state can check UCR status during an inspection.

Idaho also serves as a base state for carriers from non-participating jurisdictions — specifically, a carrier based in Arizona, Hawaii, Nevada, Oregon or Wyoming that has no office in a participating state may choose Idaho.

IFTA fuel tax in Idaho

Under the International Fuel Tax Agreement you owe Idaho fuel tax on every gallon you burn inside the state, worked out from your miles here and your fleet's average miles per gallon, and you get credit for tax paid on fuel you bought here. Idaho reported a special-diesel rate of $0.3200 per gallon for 4Q2026.

That puts Idaho at number 22 of 46 US IFTA jurisdictions shown here, 2 percent above the median of $0.3150. At a mid-table rate, fuel-stop decisions in Idaho matter less than pump price; the return will roughly net out as long as purchases track miles. The closest rates to Idaho's are Nebraska ($0.3180), Iowa ($0.3250), Minnesota ($0.3260).

A worked example

Run 1,000 miles in Idaho at 6.5 mpg and you burned 153.8 gallons here, which at $0.3200 is $49.22 of Idaho tax. If you bought 153.8 gallons in Idaho on that trip you have already paid $49.22 at the pump and owe nothing more; if you bought none, the whole $49.22 is due on the return. The IFTA calculator does this for every state on a trip.

Federal filings that apply in Idaho as everywhere

• Heavy Vehicle Use Tax, IRS Form 2290: $100 a year for a 55,000 lb vehicle, $550 for anything over 75,000 lb, logging vehicles at 75 percent; due the last day of the month after first use.
• Operating authority: $300 per authority type under 49 CFR 360.3T, a USDOT number at no charge, $10 per insurance filing.
• Medical certificate: the 49 CFR 391.41 standards (20/40 vision, 70-degree field, forced whisper at 5 feet), renewed every 24 months, or 12 for some conditions.
• Carrier lookup: check any USDOT or MC number in FMCSA's SAFER system before you lease on or hire.

Not on this page yet

Idaho's IRP apportioned-plate fees, intrastate operating-authority rules, size and weight limits and state DOT contacts are not published here, because they were not available from a source this site could cite on 2026-10-23. They are listed as gaps in the methodology and will be added when they can be sourced.

Sources: UCR Plan — FAQ; IFTA, Inc. tax rate matrix 4Q2026 (updated 2026-10-21; not final until 2026-12-04); FMCSA final rule, 49 CFR 367.50 (FR Doc. 2026-17893, Docket FMCSA-2025-0655); IRS Form 2290 (Rev. July 2026), Tax Computation. Checked 2026-10-23.