Employers are obliged to deduct PRSI at the appropriate rate from the earnings of an employee. This PRSI must be paid by the employer to the Revenue Commissioners, normally on a monthly basis, through the Revenue On-Line Service (ROS). If PRSI is not remitted on time then penalties may be incurred. This is within the remit of the Revenue Commissioners.
It is a function of Department inspectors to ensure that employer PRSI compliance is in order. Social Welfare inspectors have statutory powers to collect arrears of PRSI due. They cannot collect PRSI which refers to employment in a current year. Technically this PRSI does not become due until after the end of the tax year within which the employment has taken place.
If an employer fails to pay the full amount of PRSI arrears due to the Revenue Commissioners this issue is remedied either by the Department billing the employer and collecting the PRSI due, or in some instances, notifying Revenue of the situation, depending on the individual circumstances of the case.