Fuel is one of the biggest variable costs for contractors running heavy equipment. Managing it well means tracking every purchase, allocating costs to the right jobs, and using that data to understand what’s actually happening on your projects.

Start with fuel cards. They give you detailed transaction records showing the date, equipment number, gallons, and location. This is much cleaner than collecting paper receipts from every operator. Most fuel card programs let you assign cards to specific pieces of equipment, which makes tracking consumption by unit straightforward.

Require operators to log equipment hours alongside fuel purchases. Gallons alone doesn’t tell you much. Gallons per hour tells you whether an excavator is running efficiently or burning through fuel faster than it should. Sudden changes in consumption often signal mechanical problems before they become expensive repairs.

Allocate fuel to specific jobs. If a dozer spends two weeks on one project, the fuel it burns during that time is a direct cost of that job. Without this allocation, fuel sits in one big expense category and you have no idea which jobs are profitable and which ones are eating your margin. This is where construction job costing becomes essential for any contractor running equipment across multiple projects.

Set up your chart of accounts to track fuel as a cost of goods sold rather than overhead. This keeps it visible in your gross profit calculations and tied to the work you’re billing for. Lumping fuel into general operating expenses makes it invisible when you’re reviewing job profitability.

Review fuel costs monthly. Compare consumption across similar equipment. If two identical skid steers are burning different amounts of fuel for similar work, something is wrong with one of them. Watch for purchases that don’t match job schedules. Fuel theft happens and shows up as consumption that doesn’t align with hours worked.

The data also helps you bid better. When you know exactly what it cost to fuel equipment on past jobs, you can estimate future projects more accurately. Guessing at fuel costs leads to underbidding profitable work or losing jobs because you padded the estimate too much.

For contractors along the Wasatch Front running excavators, loaders, and other heavy machinery, getting this right can mean the difference between healthy margins and wondering where the money went. If you need help setting up proper tracking and allocation, our bookkeeping services in American Fork can get your fuel costs organized and flowing into job-level reports that actually help you run the business.