About the Fuel Tax Credit Calculator
A Fuel Tax Credit Calculator Australia helps businesses claim credits for the fuel tax excise included in the price of eligible fuels used off-road or in heavy on-road vehicles. Administered by the ATO, fuel tax credits reduce your business operating costs and improve cash flow for industries such as transport, farming, mining, construction, and forestry. The Australian fuel excise system imposes a tax on petrol, diesel, and other fuels at the pump, and the Fuel Tax Credit scheme allows businesses to claim back some or all of that excise. Calculating the correct credit rate per litre requires understanding your vehicle's GVM, fuel type, and business activity.
What is the Fuel Tax Credit Calculator?
The Fuel Tax Credit Calculator is a financial tool that determines the amount of fuel tax credit a business can claim on eligible fuel purchases. The ATO sets specific cents-per-litre rates that vary based on whether the fuel is used off-road, in light vehicles on public roads, or in heavy vehicles on public roads. For the 2025-26 financial year, the base rate for diesel used off-road is approximately 42.7 cents per litre, with lower rates for on-road use depending on vehicle GVM and distance travelled. Eligible fuels include diesel, petrol, liquefied petroleum gas (LPG), liquefied natural gas (LNG), compressed natural gas (CNG), biodiesel, and ethanol blends. Businesses must hold a valid ABN, be registered for GST, and use the fuel in eligible business activities. Fuel used in light vehicles (under 4.5 tonnes GVM) on public roads is generally not claimable, while off-road use and heavy vehicle use attract credits. The calculator also handles blended fuels and accounts for the fuel tax credit indexation that occurs on 1 February and 1 August each year.
How to Use This Calculator
- 1Select your fuel type: Choose from diesel, petrol, LPG, LNG, CNG, or biodiesel. Each fuel type has its own base credit rate that the calculator applies.
- 2Choose the usage category: Select off-road (e.g., farm machinery, generators, mining equipment), heavy on-road (vehicle GVM 4.5 tonnes or more), or light on-road (GVM under 4.5 tonnes — generally not eligible).
- 3Enter total litres purchased: Input the number of litres of eligible fuel purchased during the period. Use your fuel purchase receipts or tax invoices.
- 4Indicate any distance travelled on public roads: For heavy on-road vehicles, enter the total kilometres travelled on public roads during the period. The calculator adjusts the rate proportionally.
- 5Specify the quarter or month: Select the BAS period you are claiming for. The calculator uses the correct indexed rate for that period.
- 6Click Calculate: The tool displays the total fuel tax credit amount in Australian dollars, the effective rate per litre, and a breakdown of how the credit was calculated.
- 7Save the result: Copy the figure to include in your BAS at label 9D (Fuel Tax Credit) or export the calculation for your records.
Worked Australian Example
Practical Example
Consider Atherton Tablelands Farming, a sugarcane farm near Cairns, Queensland, owned by the Torres family. For the March 2026 quarter, the farm used 8,500 litres of diesel in tractors and harvesters operating off-road, and 2,500 litres of diesel in a heavy truck (GVM 12 tonnes) used to transport cane to the mill, travelling 3,200 km on public roads out of a total 5,000 km. Using the Fuel Tax Credit Calculator, the Torres family selects diesel as the fuel type and off-road as the primary category. They enter 8,500 litres for the off-road equipment. The calculator applies the base rate of 42.7 cents per litre, yielding a credit of $3,629.50 for off-road use. For the heavy truck, they select heavy on-road, enter 2,500 litres and specify 64% public road use (3,200 km of 5,000 km). The calculator applies the reduced on-road rate adjusted for the public road proportion, returning a credit of $383.60. The total credit for the quarter is $4,013.10. This amount is entered at label 9D on the BAS, reducing the net GST payable for the period. The calculator saves the Torres family several hours of manual calculation and ensures they claim every cent they are entitled to under the ATO scheme.
How Our Fuel Tax Credit Calculator Works
Fuel tax credits refund the **excise or customs duty** built into the price of fuel you buy for eligible business use. The calculation is simply litres used multiplied by the applicable cents-per-litre rate: **Fuel tax credit = eligible litres × credit rate (cents per litre) ÷ 100.** The complication is that the rate depends on **how and where the fuel is used**: - **Heavy vehicles (over 4.5 tonnes) on public roads** get a *reduced* rate, because the road user charge is subtracted from the full excise. - **Fuel used off-road or in machinery, equipment and light vehicles on private property** generally gets the *full* rate. - Rates are **indexed twice a year** (February and August), so the correct rate depends on the date the fuel was acquired. The calculator matches your usage type to the right rate and totals the credit you can claim on your BAS. Fuel must be for business use, you must be GST-registered, and different fuels (diesel, petrol, LPG) can carry different rates. Because the rates change every six months, always check the current ATO rate for the relevant period before lodging.
When to Use This Calculator
Use this each BAS period if your business uses fuel in vehicles, plant or machinery. **When preparing your BAS**, to calculate the claimable credit across different usage types and vehicle categories — money many eligible businesses leave unclaimed. **When rates change (February and August)**, to apply the correct rate to fuel bought in each half of the period. **When assessing eligibility for a new activity**, such as adding off-road equipment or heavy vehicles, to see the credit it generates. It's especially valuable for transport, agriculture, construction and mining operators with high fuel volumes. Keep accurate fuel records by usage type, and confirm the current ATO rates for the period, since applying an out-of-date rate is a common error.
Common Fuel Tax Credit Calculator Questions
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