Please do not edit or change this article without checking the changes with Wasima Rahman or Paul Newsom first. Fourth Customer Success Portal September 25, 2025 10:25 Updated Share Link copied to clipboard WFM UK: National Insurance Number Prefixes The system will allow all valid NI prefixes, as specified by HMRC here in this gov.uk article. Related articles WFM UK: Payrolling Benefits in Kind to Become Mandatory WFM UK: Payroll Timetables 2026 to 2027 in Payroll WFM UK: 2024 - 2025 Legislation Updates WFM UK: Employee National Insurance Rates to Decrease from 6th January 2024 WFM UK: 2022 - 2023 Legislation Updates Comments Milan Horvath November 01, 2021 11:05 Hi, How often do these get updated? I have an employee with NJ prefix issued in October 2021. This is currently rejected by Fourth so cannot be saved into new employee's personal information. Thank you. Milan 0 Fourth Customer Success Portal November 01, 2021 17:10 Hi Milan Horvath, NJ will be available from the 4th of November. For further information on prefixes, please see: https://www.gov.uk/hmrc-internal-manuals/national-insurance-manual/nim39110 Kind regards,Fourth & HotSchedules 0 Please sign in to leave a comment.
Milan Horvath November 01, 2021 11:05 Hi, How often do these get updated? I have an employee with NJ prefix issued in October 2021. This is currently rejected by Fourth so cannot be saved into new employee's personal information. Thank you. Milan 0
Fourth Customer Success Portal November 01, 2021 17:10 Hi Milan Horvath, NJ will be available from the 4th of November. For further information on prefixes, please see: https://www.gov.uk/hmrc-internal-manuals/national-insurance-manual/nim39110 Kind regards,Fourth & HotSchedules 0
Comments
Hi,
How often do these get updated? I have an employee with NJ prefix issued in October 2021. This is currently rejected by Fourth so cannot be saved into new employee's personal information.
Thank you.
Milan
Hi Milan Horvath,
NJ will be available from the 4th of November. For further information on prefixes, please see: https://www.gov.uk/hmrc-internal-manuals/national-insurance-manual/nim39110
Kind regards,
Fourth & HotSchedules
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