NI number validation
Have any of your new employees presented with a National Insurance number containing the prefix ‘KC’? The Department of Work and Pensions has been issuing these NI numbers since June but the Real Time Information (RTI) computer at HMRC doesn’t recognise KC prefixed numbers as valid.
The computer will be reprogrammed shortly, but in the meantime, when completing your RTI submissions, you should leave the NI number field blank and complete the employee address field. Don’t request a new NI number for your employee, but continue to apply the PAYE code for that person as normal.