Fuel tax credit calculator
Estimate what your diesel purchases are worth back at BAS time. Split your litres between on-road and off-road use, enter the current ATO rate for each, and see the credit for the period.
On-road
Unknown
Off-road
Unknown
Total claim
Unknown
Getting the rate right
Fuel tax credit rates change regularly. They moved several times in 2026, most recently on 3 August 2026, when the temporary fuel excise relief ended and the heavy-vehicle road user charge returned to 32.4 cents a litre, and they are indexed again each February and August. This calculator never hardcodes a rate for exactly that reason: copy the current figure for your fuel type and activity from the ATO fuel tax credit rates table and the arithmetic here stays correct whatever the rate of the day is.
As a rule of thumb, diesel burnt in a heavy vehicle on public roads claims at a lower rate than fuel used off public roads: idling, running a PTO or working on site usually qualifies for the higher "all other business uses" rate, which is why the calculator splits the two. Eligibility, the simplified methods for claims under $10,000 a year, and the records you need to keep are the ATO's call, not ours. This page does arithmetic, not tax advice.
Or let the logbook do it
Log fill-ups in WayBeacon and the credit is worked out for you, each fill-up at the ATO rate for its date.
Screenshots of the live app, captured 10 November 2026
