I take it that the Deputy is referring to the employment status of building and construction workers who are self-employed under the C45 system but who wish to pay tax and PRSI as employees.
Persons employed in the construction industry are classified for tax purposes as employees or as sub-contractors and tax is deducted from each group on a different basis. Sub-contracting itself is, of course, an integral part of the construction industry. Payments to sub-contractors come within the relevant contracts tax (RCT) system – commonly referred to as the C2 or C45 system. Under this system, where a principal contractor makes a payment to an unregistered contractor, he or she is required to deduct relevant contracts tax from those payments at the rate of 35 per cent. RCT was introduced in the 1970s to counter the growing incidence of black economy activity in the construction industry. Workers operating under the system known as "the lump" were being paid without tax being deducted. The Revenue Commissioners have confirmed that RCT continues to play a vital role in combating tax evasion in the construction industry.