The figure for this financial year is up from a forecast of $765 million set out in the June state budget,Treasurer Cameron Dick was set to reveal in a budget update on Wednesday.
Market distortions caused by war in Ukraine and Australian weather have left coal prices higher for longer than expected when the budget was prepared.
At the time the forecast was criticised as a conservative estimate by a resources sector that has since vowed a two-year campaign against the royalty changes until the next state election.
Thermal coal prices were expected to fall as global drivers tapered off.
Surging royalties have also underpinned Premier Annastacia Palaszczuk’s repeated warnings to the federal government that she expects compensation if any energy price plan to besigned off by national cabinet this week hits state revenue.
Announcing the new royalty tiers in June to cash in on “supernormal” profits,Dick said they were forecast to deliver an extra $1.2 billion to the stateover four years,with that windfall to be put aside for regional hospital upgrades or construction.
The four-year total is now expected to be $3.4 billion,the budget update will show.