Fuel Tax Calculator Australia – Credit Rates 2025–2026

The fuel tax credit calculator Australia helps businesses estimate how much fuel they can claim. Many industries such as transport, farming and construction, use large amounts of fuel and the Australian government allows eligible businesses to claim back part of the fuel tax.

This guide also explains what a GST tax credit is, who can claim it and how much you may get back using our GST calculator. If you already have a price that includes tax, you can remove it using a reverse GST calculator.

What Is Fuel Tax Credit in Australia?

It is a portion of the fuel tax that businesses can claim back from the government. If your business uses fuel for:

• Trucks
• Buses
• Machinery
• Generators
• Construction or farm equipment

You may be able to claim money back from the government. Businesses that receive tax refunds should also check their amounts using a GST refund calculator.

Tax Credit Rates (2025–2026)

Credit rates in this calculator apply from 1 July 2025 to 30 June 2026. Rates are updated during the year, so the amount you can claim depends on:

• When you bought the fuel
  
• How the fuel was used

👉 Always use the rate that applies on the date you purchased the fuel.

Why Are There Different Rates?

Credit rate changes depending on.

• Fuel type (diesel, petrol, gas, blended fuel)
  
• How the fuel is used
  
• Road user charges for heavy vehicles
  
• Annual government adjustments

Two Main Types of Fuel Use

1. Fuel Used in Heavy Vehicles on Public Roads it includes:

• Trucks
  
• Buses
  
• Coaches

⚠️ Because these vehicles pay a road user charge, so:

• Credits are lower
  
• Sometimes the credit becomes zero

2. Fuel Used for All Other Business Purposes like

• Machinery
  
• Generators
  
• Forklifts
  
• Farming equipment
  
• Construction tools
  
• Auxiliary equipment (like truck-mounted machinery)

These businesses usually receive higher credit because the fuel isn’t used on public roads.

How Credits Depends On Types Of Fuel 

Diesel & Petrol

• Heavy vehicles on roads:
  ✔ Lower credit per litre
  
• Other business use:
  ✔ Much higher credit per litre

Blended Fuels (B5, B20 & E10)

• Same treatment as diesel and petrol
  
• Road use = lower credit
  
• Other business use = higher credit

E85 Fuel

• For vehicle there is no credit
  
• For other businesses small credits are available

LPG (Liquefied Petroleum Gas)

• Road use: No credit
  
• Other business use: Some credit available

LNG & CNG

• Road use: No refund
  
• Other business use: Credit available per kilogram

B100

• Road use: No credit
  
• Other business use: Credit available

Why Do Some Fuels Have Zero Credit?

The following are some reasons

• The road user charge increases every year
  
• If the road user charge is higher than the tax refund
  
• The final credit becomes zero

This is normal and set by government rules.

What is Road User Charge

It is a fee paid by heavy vehicles for using public roads. It increases every year to maintain roads. Due to this charge, fuel credits are becoming lower each year.

How to Claim Tax Credits Through BAS

It is claimed through the Business Activity Statement (BAS). To avoid mistake you should use a calculator

• Enter
  1. Fuel type
     
  2. Date of purchase
     
  3. Amount of fuel
     
  4. How the fuel was used

👉 This helps to calculate the correct amount to report.

Why a Fuel Tax Calculator Is Helpful?

This calculator helps you:

• Save time
  
• Avoid wrong claims
  
• Instantly know how much credit you can get
  
• Use the correct rate for the correct date

It is especially useful because:

• Rates change during the year
  
• Different fuels have different rules

Who Should Use This Information?

This guide is useful for:

• Truck operators
  
• Transport companies
  
• Builders and tradies
  
• Farmers
  
• Mining businesses
  
• Construction companies
  
• Any business using fuel for work

Disclaimer

This information is collected by well research and is for general guidance only. Rate, rules and eligibility may be changed over time. The calculator is just a helper tool. The actual amount depends on the business situation, fuel type, date of purchasing and how the fuel was used. This page or our calculator does not provide tax legal advice. Before lodging your BAS, you should check the latest guidance from the Australian Taxation Office (ATO) or speak with a registered tax agent.

Frequently Asked Questions

Final Words

You can save your business money, but only if:

• You use the correct rates
  
• You understand how fuel is used
  
• You claim accurately on your BAS

Using a Fuel tax calculator makes everything easy and safe.