Fuel, Tyres & the True Cost of Running a Truck

Key highlights

• Fuel is usually the single biggest running cost for a heavy truck
• Tyres are a major recurring expense, especially on multi-axle configurations
• Servicing, registration, insurance and permits all belong in your cost per kilometre
• Knowing your cost per kilometre lets you price jobs profitably
• Structuring finance so the repayment fits leaves room for the running costs

Fuel: the biggest variable in your budget

For most heavy trucks, fuel is the largest single running cost, often dwarfing the finance repayment over a year of solid work. Fuel burn depends on the engine, load, terrain, driving style, and how much time is spent idling. A prime mover pulling a loaded B-double across long highway runs consumes very differently to a rigid doing suburban distribution. Because diesel prices move, fuel is also your most volatile cost, which makes it worth tracking closely. Many operators are eligible for fuel tax credits on business use, which can offset some of the cost, though eligibility and rates vary and should be confirmed with your accountant. Building a realistic fuel figure into your rates is fundamental to staying profitable.

Tyres: a recurring cost that adds up fast

Tyres are the running cost operators most often underestimate. A heavy vehicle can carry a large number of tyres across its axles and trailers, and each one is a significant outlay when it needs replacing. Wear depends on loads, road surfaces, alignment, pressures, and driving habits. Retreads and careful rotation can stretch the budget, but tyres remain a steady, predictable drain that belongs firmly in your cost planning. Neglecting them is a false economy, since worn or poorly maintained tyres hurt fuel economy, raise the risk of a blowout and downtime, and create safety and compliance issues. Treating tyres as a scheduled cost rather than a surprise expense keeps both your budget and your truck in better shape.

Servicing, repairs and downtime

Regular servicing keeps a truck reliable and protects resale value, but it is a real cost, and heavy vehicles are not cheap to maintain. Beyond scheduled servicing, there are brakes, filters, fluids, and the inevitable repairs that come with high-kilometre work. The hidden cost hiding behind all of this is downtime. A truck in the workshop is not earning, and for an owner-driver that lost income can hurt more than the repair bill. This is why preventative maintenance usually beats running equipment into the ground. Budgeting a maintenance reserve, and factoring the age and condition of a truck into your buying decision, helps you avoid the cash-flow shock of a major failure at the worst possible time.

Registration, insurance and compliance costs

Heavy vehicle registration, insurance, permits, and compliance obligations round out the fixed side of your running costs. Registration for a large truck or combination is a substantial annual figure, and insurance for commercial heavy vehicles reflects the value and risk involved. Depending on your work, you may also face road user charges, permits for oversize or interstate movements, and industry accreditation costs. These are largely unavoidable and predictable, which is actually helpful, because fixed costs are easy to build into your rates once you know them. The mistake is leaving them out of your calculations and being caught short when the renewal lands. List every fixed cost for the year and divide it into your expected kilometres to see its true impact.

Working out your cost per kilometre

The single most useful number an operator can know is their cost per kilometre. Add up everything, finance, fuel, tyres, servicing, registration, insurance, and your own time, then divide by the kilometres you realistically run in a year. That figure tells you the floor beneath which a job loses money. Surprisingly many operators price on gut feel and discover only at tax time that a busy year barely broke even. Knowing your cost per kilometre lets you quote with confidence, walk away from work that does not pay, and spot when rising costs mean your rates need to move. It also shows exactly how much room your finance repayment leaves in the budget.

Structuring finance around your running costs

Once you understand your full running costs, you can structure finance so the repayment sits comfortably alongside them rather than competing with them. Options like matching the loan term to how long you will keep the truck, seasonal or structured repayments for operators with uneven income, or a balloon to lower monthly outlay can all help the repayment fit your real cash flow. The goal is never simply the lowest headline rate, it is a repayment you can meet in a quiet month as easily as a busy one. Because Overdrive compares a broad panel, the broker can shape a structure around your running-cost reality, so a lean month never puts your finance under pressure.

Knowing your true running costs puts you in control, and the right finance structure keeps them manageable. Simon Kendrick can compare indicative options across 80+ lenders and shape repayments to fit alongside fuel, tyres, and everything else your truck demands. A quote involves a soft credit check only, so your file is not affected, and eligible applicants can often get a decision within 24 to 48 hours. Rates are indicative from around 6.55% p.a. and subject to assessment. Reach out to Overdrive Truck Finance for an obligation-free conversation about keeping your truck profitable.