Setting Up Your Idaho IFTA Account

To set up an International Fuel Tax Agreement (IFTA) account in Idaho, you must register through the Idaho Transportation Department (ITD) using their Trucking Online portal. An IFTA license is required if your qualified motor vehicle travels between Idaho and at least one other member jurisdiction and has two axles and a gross vehicle weight exceeding 26,000 pounds, or has three or more axles regardless of weight. Once registered, you will receive two decals per vehicle and one annual license, allowing you to report and pay fuel taxes to a single base jurisdiction rather than individual states. Effective management of IFTA requires precise distance tracking across state lines to avoid audit penalties. DispatchTool simplifies this process by automatically tracking miles traveled by state, which can then be exported directly into your Idaho quarterly reports. By using DispatchTool for automated trip logging and expense management, carriers reduce the risk of clerical errors during the ITD filing process. You can start organizing your fleet data today by creating a DispatchTool account to streamline your quarterly reporting.

Determine Your Idaho Base Jurisdiction Eligibility

Before applying, you must verify that Idaho is your legal base jurisdiction. According to the ITD, a carrier qualifies if they have an established place of business in Idaho, maintain their operational records in the state, and operate qualified motor vehicles that travel on Idaho highways. A qualified vehicle is defined as one used for transporting persons or property that has a gross vehicle weight or registered gross vehicle weight over 26,000 pounds. Vehicles with three or more axles, regardless of weight, also qualify. If your fleet is based in Idaho but you do not leave the state, you do not need an IFTA license; instead, you pay the fuel tax at the pump or via Idaho-specific weight-distance tax regulations if applicable.

Registering Through Idaho Trucking Online

The primary method for IFTA registration is the Idaho Trucking Online (ITOL) system. You must first create a user account and provide your Federal Employer Identification Number (FEIN) or Social Security Number. The application requires your USDOT number and proof of Idaho residency, such as a utility bill or Idaho driver's license. Unlike some states that charge a flat registration fee, Idaho currently does not charge for the IFTA license itself, though there is a small fee for the physical decals. Most carriers receive their credentials within 10 to 14 business days after the ITD processes the electronic application and verifies the carrier's standing with the FMCSA.

IFTA Decal Requirements and Costs

Upon approval, the Idaho Transportation Department issues one IFTA license and two decals for each qualified motor vehicle. As of 2024, the cost for a set of two decals is $0.00 in Idaho for the initial registration, though a $10.00 fee may apply for replacement sets or additional decals requested mid-year. Decals must be placed on both sides of the exterior of the cab. These decals are valid for one calendar year, expiring on December 31st. There is a two-month grace period through February of the following year, provided you have submitted your renewal application by the December deadline.

Record Keeping for Idaho Audits

Idaho requires carriers to maintain detailed records for four years from the filing date. This documentation must include Individual Vehicle Mileage Records (IVMR) showing the date of the trip, origin and destination, routes of travel, and total miles per jurisdiction. You must also keep all original receipts for tax-paid fuel purchases. Receipts must clearly show the number of gallons, the type of fuel, the price per gallon, and the location of the purchase. The ITD conducts audits on approximately 3% of IFTA accounts annually to ensure compliance. Failure to maintain these records can result in a $100 penalty or 10% of the tax due, whichever is greater, plus the assessment of taxes based on an estimated 4.0 miles per gallon.

Quarterly Filing Deadlines and Penalties

Idaho IFTA returns are due on the last day of the month following the end of each calendar quarter. The first quarter (Jan-Mar) is due April 30; the second quarter (Apr-Jun) is due July 31; the third quarter (Jul-Sep) is due October 31; and the fourth quarter (Oct-Dec) is due January 31. If the deadline falls on a weekend or legal holiday, the next business day is the due date. Late filings incur a penalty of $50.00 or 10% of the net tax due, whichever is greater. Interest is also applied at a rate of 1% per month until the balance is paid in full. Even if no travel occurred during a quarter, a 'Zero' return must still be filed to keep the account in good standing.

Idaho Fuel Tax Rates and Surcharges

The Idaho fuel tax rate for diesel is currently $0.32 per gallon. When filing your IFTA return, you calculate the total tax due by multiplying the net taxable gallons in each jurisdiction by that jurisdiction's specific tax rate. For example, if you purchased 500 gallons of diesel in Idaho but consumed 600 gallons while driving in Washington (where the tax rate is higher, currently $0.494), you would owe the difference for the miles driven in Washington. Conversely, if you purchased more fuel in a high-tax state than you consumed there, you would receive a credit that can be applied to future quarters or refunded.

Sources

Idaho Transportation Department (ITD) - Commercial Vehicle Services (2024) — https://itd.idaho.gov/itship/ International Fuel Tax Association, Inc. (IFTA) (2024) — https://www.iftach.org/ Idaho Statutes Title 63, Chapter 24 (2023) — https://legislature.idaho.gov/statutesrules/idstat/Title63/T63CH24/

Frequently asked

How long does it take to get Idaho IFTA decals?

Once your application is submitted via Idaho Trucking Online, it typically takes 7 to 10 business days for the ITD to process the request and mail the decals. During peak renewal periods in December and January, processing times can extend to 15 days.

What is the penalty for not filing IFTA in Idaho?

The Idaho Transportation Department charges a late filing penalty of $50.00 or 10% of the total tax due, whichever is higher. Additionally, interest is charged at 1% per month on any unpaid tax balance.

Do I need IFTA if I only drive in Idaho?

No, if you operate exclusively within the borders of Idaho, you do not need an IFTA license. You simply pay the state fuel tax at the pump. IFTA is only required for interstate travel.

How much does an Idaho IFTA license cost?

Idaho does not charge a fee for the annual IFTA license itself. However, there may be small administrative fees for decal sets, and you must maintain a valid USDOT number and be in good standing with the state.