The Government is planning to change the way Accident Compensation rates are levied.
From 1 April next year, levies will be adjusted in line with a workplace's history of accidents.
Under the changes, larger businesses will be assessed on their safety record for the previous three years and their fees discounted or increased by up to 50%.
Smaller employers will have a 10% no-claims bonus or face higher costs depending on their workers' injury claims.
ACC Minister Nick Smith says the changes will provide strong safety incentives and deliver a fairer system for dangerous industries like forestry.
He says safe forestry businesses are effectively subsidising those with a poor safety record.
This proposal, Dr Smith says, will allow those business with a good safety record to enjoy the benefits of lower ACC premiums.