You need a ROS digital certificate to do your payroll in Ireland if you are submitting payroll information to the Revenue Commissioners  electronically through the Revenue Online Service (ROS).

Here’s  why:

Legal Requirement

Since the introduction of PAYE Modernisation (January 2019), Irish employers are required to report payroll information to Revenue in “real time”—every time employees are paid. All this reporting must be done online via ROS.

Secure Access

A ROS digital certificate provides secure, authenticated access to Revenue’s online services. It ensures that only authorised individuals can view or submit your company’s payroll reports, safeguarding sensitive employee and financial data.

File Submissions

Payroll submissions (Payroll Submission Requests (PSRs), Revenue Payroll Notifications (RPNs), etc.) must be filed through ROS by law. Your digital certificate acts as your electronic signature on these submissions.

What Does the Digital Certificate Do?

Verifies your identity to Revenue

Encrypts your data to protect it in transit

Enables you to submit, amend, or view payroll data

Required to use payroll software connected to ROS

Who needs a Digital Certificate?

Employers running payroll and reporting directly to Revenue

Payroll agents/accountants doing it on behalf of clients

Anyone needing access to tax clearance, P30 returns, P60s, etc.

Summary

You need a ROS digital certificate because Irish payroll process **is now fully online** and **must be authenticated and protected**. Without it, you cannot legally or securely submit payroll reports to Revenue.

Useful links

Revenue: ROS Digital Certificates explained here. 

Revenue: PAYE Modernisation here. 

FAQs

Q. I need to be set up as a sub-user on ROS / I need to apply for a ROS Access Number. Can you do this for me?

A. We’re not able to set this up on your behalf. You’ll need to contact Revenue directly, as they are the only ones who can create sub-users and issue ROS Access Numbers.