What can be done to minimise the problem of missing NI numbers?

Thursday, October 14th, 2010

Most employers have difficulty in obtaining a National Insurance number for every employee.  Some new employees are just very lax in providing their number.  It can take months for an employee from outside the UK to obtain an NI number.  In an organisation with many sites, demands from a centralised payroll office for NI numbers for new employees may go unheeded.

There is no statutory requirement for an employer to hold an NI number for every employee.  The Social Security Contributions and Benefits Act 1992 (Schedule 1, paragraph 7A) provides for Regulations to be made that would penalise employers for negligently failing to provide NI numbers.  However, as explained in Tax Bulletin 46 (April 2000), no Regulations have been made under those provisions and HMRC would prefer to handle the causes of missing and inaccurate NI numbers through education rather than penalties.  Even if Regulations were made in the future, HMRC’s commitment was that breaches would be handled by educational visits to offending employers to resolve the difficulty before any penalties were imposed.

However, HMRC certainly expects employers to obtain NI numbers and quote them on all paper and online tax and NI forms and correspondence.  It is clearly in the interests of employees for their NI number to be quoted on their online P14 End of Year Summary as it ensures that their contribution record is kept up-to-date.

HMRC has put procedures in place to help employers trace missing numbers and these are set out in Revenue booklet E13, on pages 32.

If a new employee does not provide an NI number and the P45 does not show one, the employer should record the employee’s name, address, date of birth and gender.  The last two items of information must be quoted on a P14 in the absence of an NI number.

Employees who have never had an NI number should be directed to the local Jobcentre Plus (Social Security or Job Benefits Office in Northern Ireland) for an interview.  At the interview, form CA5400 is completed and the employee should retain the front cover and give it to the employer to show that a number has been applied for.  Information about obtaining a new NI number is available here.

If a P46 has been sent to the employer’s tax office with no NI number entered, no further action is needed as the number will be traced automatically.  If HMRC cannot find the number, the employee may be contacted direct for further information.  When the number has been found, the employer and employee are informed on forms P46-5 and P217 respectively.

If the employer is missing several NI numbers, or if the NI number held by the employer differs from the one being used by HMRC, the tracing form CA6855 can be used.  This can be downloaded from HMRC’s website at or printed out from the Employer’s CD-ROM.  Details for up to 6 employees can be entered on one form, which is then sent to the address on the form.  Alternatively, a computerised schedule can be used, listing the same information as is required on form CA6855.  When the numbers have been traced, they are written on the CA6855 or schedule and returned to the employer.

A larger scale checking service is available to Occupational Pension Schemes and to computer bureaux or agents.  This free service allows enquiries to be made using paper schedules, magnetic tape or flexible disk.  The checks may not be performed more frequently than three years.  Details of the scheme are provided in manual CA21 Using the National Insurance Number / Date of Birth Checking Service.

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2 comments on “What can be done to minimise the problem of missing NI numbers?”

  1. witam mam problem z nr National Insurance na karcie jest moje imie i nazwissko ale nr przysługuje go kogos całkowicie innego a nie do mnie :( jestem w angli 3 lata i dopiero teraz sie o tym dowiedziałam wiec moje lata pracy nie wliczaja mi sie :( gdzie mam to zgłosic :(:( ???? pomocy

  2. Alicja: If the Google translation of your comment is correct, your national insurance number is being used by someone else and you want to know who to contact about it. I suggest that you phone the National Insurance Registrations Helpline on 0845 915 7006 (lines open from 8.30 am to 5.00 pm Monday to Friday) and explain the situation. They should be able to tell you what to do.

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