Forms P11D - reporting employee benefits The forms P11D which report details of benefits and some expenses provided to employees and directors for the year ended 5 April 2021, are due for submission to HMRC by 6 July 2021. The process of gathering the necessary information and completing the forms can take some time, so it is important that this process is not left to the last minute. Employees pay tax on benefits provided as shown on the P11D, generally via a PAYE coding notice adjustment or through the self assessment system. Some employers 'payroll' benefits and in this case the benefits do not need to be reported on forms P11D but employers should advise employees of the amount of benefits payrolled. In addition, regardless of whether the benefits are being reported via P11D or payrolled the employer has to pay Class 1A National Insurance Contributions at 13.8% on the provision of most benefits. The calculation of this liability is detailed on the P11D(b) form. The deadline for payment of the Class 1A NIC is 19th July 2021 (or 22nd for cleared electronic payment). If you would like any help with the completion of the forms or the calculation of the associated Class 1A NIC please get in touch. Internet link: HMRC guidance