While news of the soaring rental values had been foreshadowed in June this year, the reality is only now beginning to sink in as notices of the rent rises make their way into pastoral homesteads.

The Pastoralists and Graziers' Association (PGA) says while the Pastoral Lands Board has refused to divulge information on individual rental leases, the farm group has been receiving information from many of its members who were outraged by the exorbitant increases.

And to rub salt into the wounds, pastoralists have until November 1 to pay half the new rate or accrue a 10 per cent interest penalty.

PGA president Rob Gillam said Kimberley pastoralists were hit hardest, with many stations asked to fork out between 400pc to 550pc more than they did previously.

"Increases of this size would see annual rentals in the Kimberley leap from $10,000-$30,000 to more than $100,000 at the top end and would render many long term, family pastoral businesses unviable," Mr Gillam said.

Read full story in this week's Farm Weekly.