Cost Per Mile to Operate a Truck in Idaho (2026)
What it actually costs owner-operators to run a semi-truck in Idaho — diesel, insurance, IFTA, and freight market notes for ID.
Diesel prices in Idaho
The average diesel price in Idaho is roughly $3.80/gal. For a truck running 8,000 miles/month at 6.5 MPG, that's about $4,677/month in fuel alone — or roughly $0.58/mile. Fuel is typically 30–40% of total cost per mile, so Idaho's diesel price has a major impact on whether a load is profitable.
Trucking insurance in Idaho
Idaho insurance averages $9,500–$13,000/yr. Annual premiums vary widely based on CDL history, equipment age, and operating radius.
ID IFTA and fuel taxes
Idaho IFTA fuel tax: 32¢/gal diesel. File quarterly and keep accurate trip mileage records by jurisdiction to stay compliant.
Freight market in Idaho
Agriculture-heavy — potatoes, dairy, lumber out of Boise and the Treasure Valley.
How to lower your cost per mile in Idaho
- Track diesel by region — refuel where the all-in price (pump + state tax) is lowest.
- Negotiate fuel surcharge into every contract using a clear formula tied to the DOE index.
- Reduce deadhead — a 20% deadhead ratio adds 25% to your effective cost per loaded mile.
- Run our Cost Per Mile Calculator monthly with real receipts, not estimates.