He said: "This benefit will be exclusive to quality mark scheme members."
Under the scheme, member contractors will be able to access a liability package offering up to 20% off premiums, provided through insurance provider QANW.
Wilson said: "The premium reduction will offer a significant opportunity to offset any entry costs associated with quality mark, and reflects the confidence insurers have in the scheme."
Once contractors have been successfully vetted by the Contractors Health and Safety scheme, quality-marked firms with more than 20 employees engaged in manual trades will be eligible for the discount.
Other key findings in the survey were that 51% of people do not trust tradesmen, 40% would never employ a company that has not been approved.