Employee agreement to pay employer NICs

Hi, I've exercised some options (Unapproved scheme) and entered into an agreement to pay the employer’s (secondary) NICs, as described here: https://www.gov.uk/hmrc-internal-manuals/employment-related-securities/ersm110520 How can I pay the said employer contribution? As far as I can tell, it is not part of the self assessment, but I cannot find any relevant guidance for this case. Thank you

Hi msorb,

We are sorry but we are unable to find the manual number you have referred to.

You could potentially call the employment related securities helpline on 0300 322 7074 to discuss this further.

Thank you.