PMOD Quick Start Guide

This is for people who do not want to spend all afternoon reading about the intricacies of digital certificate encryption etc, and just need to run their Payroll and be compliant.

Front End Changes

We've had to make some relatively minor changes to the front end for PAYE Modernisation. 

Digital Certificates

Revenue uses Digital Certificates to ensure that data is securely transmitted to their servers and that only permitted users can submit information. Payback uses these files to communicate with ROS. These are instructions for setting up your digital certificates


Check everything is working okay for PMOD direct reporting. Find out if there are any problems.

TAIN (Agent) Digital Certificates

People who process payroll for others (Bookkeepers, Accountants, Bureax etc) and have TAIN digital certificates need to follow a slightly different way of uploading their Digital Certificates.

RPN Direct Reporting

Using direct reporting to update employee tax details.

RPN ROS Reporting

Payback also can communicate with Revenue via ROS reporting.

RPN Partial Match Utility

When you import RPNs, sometimes there can be multiple RPN records for an employee on the Revenue server, all with different employment IDs.

If you see Partial Matches appearing the RPN grid, then it may be easier to use the Parital Match utility to import the RPNs.

EmploymentID Explained

What is the new Employment ID field and when should you use it.

Payroll Submission (PSR)

When you have successfully imported and updated your tax credits information (RPNs), the next step is to process the pay for your employees. Once that is complete and you are happy that everything is correct, it is time to make your submission to Revenue.

Payroll Submission ROS Reporting

Submit your payroll if your Revenue Digital certificate stops working

Starters and Leavers (P45)

How to handle employees who are starting and leaving employment.

Re-employing people

Revenue have introduced an Employment ID, but have not (in our opinion) adequately explained how this works. This has resulted in confusion, especially around re-employing people.

This guidance show you how to re-employ people in Payback. This is for people who have left your employment but then re-joined the same company  - for example seasonal staff.

Trouble shooting

Problems, errors and their solutions

Digital Certificate Troubleshooter

Revenue have opted to use Digital Certificates as a means to access their server.

Unfortunately, digital certificates cause problems such as:

  • Being expired by Revenue
  • Having incorrect permissions allocated to them
  • Being difficult to use and set up.
  • Not being compatible with older operating systems.
  • Conflicts with other applications and processes.

Most digital certificate problems are outside of our control, but we can solve some issues that may happen.