Most fleets claim fuel tax credits — few claim them properly. Two different rates, apportioned usage and quarterly rate changes mean real money leaks out of lazy BAS prep.
Two rates, one tank
Fuel tax credits (FTC) refund some or all of the fuel excise you pay at the bowser. The catch for transport operators: the rate depends on how the fuel is used. Diesel burned in heavy vehicles over 4.5 tonnes GVM travelling on public roads attracts a reduced rate, because the road user charge is deducted. Fuel used off public roads, or to power auxiliary equipment like refrigeration units, hydraulic lifts and pumps, can attract the full rate.
Same truck, same tank — two different entitlements. If you claim everything at the reduced on-road rate, you're handing money back to the ATO every quarter.
The BAS mechanics
FTC is claimed on your BAS, so it lands in the same rhythm as GST and PAYG. To claim properly you need a defensible split between on-road and off-road or auxiliary use — and records to back it up: fuel invoices, fleet card data, telematics or odometer records, and a reasonable apportionment method for auxiliary draw.
Rates are indexed and change during the year, so always apply the current ATO rates for the period you're claiming. Check the ATO's published FTC rates each quarter rather than rolling last quarter's numbers forward.
Where fleets leak money
The same four leaks show up again and again:
- Claiming all fuel at the reduced on-road rate and missing auxiliary and off-road entitlements
- Using an outdated rate after an indexation change
- No defensible apportionment method — estimates the ATO wouldn't accept in a review
- Forgetting you can generally back-claim missed credits for up to four years
Make it systematic, not seasonal
FTC shouldn't be a quarterly scramble through shoebox fuel dockets. In a digital twin, fleet-card fuel data flows in monthly, the on-road versus auxiliary split is applied consistently, and the FTC entitlement is visible alongside your real cost-per-km. BAS time becomes a check, not a hunt.
Want this watched for you, not by you?
BYN builds road freight businesses a digital twin that monitors compliance and cash proactively — so issues like the ones in this article surface months before they bite.
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