What is a P11D? | Business At
What is a P11D? It is an HMRC form used by UK employers to report expenses and benefits provided to employees or directors.
This guide explains its purpose, deadlines, and key changes for 2026 to help you stay compliant.
What is a P11D and Its Purpose?
A P11D form reports benefits in kind, such as company cars or health insurance, to HMRC.
From 6 April 2026, this reporting must be done through payroll software as mandated by HMRC.
P11D Filing Deadlines and Penalties
You must report expenses and benefits to HMRC by 6 July after the tax year ends.
- Class 1A National Insurance contributions are due by 22 July, or 19 July if paying by cheque.
Late filing incurs penalties of £100 per 50 employees for each month it is overdue, plus interest charges.
Correcting Errors on P11D Forms
HMRC provides online P11D and P11D(b) amendment forms to correct errors after submission.
This process helps address common filing mistakes and ensures accurate reporting to avoid penalties.
Special Cases: Employer Cessation
Employers who cease trading during the tax year can submit paper P11D returns from 6 April 2026.
This measure facilitates filing for businesses in cessation or insolvency, addressing practical challenges.
2026 Changes and Draft Guidance
Mandatory payrolling of benefits starts from April 2026, but the guidance is draft until Autumn 2026.
Employers should stay updated as legislation may change, reflecting ongoing reforms in the P11D system.
Need Expert Help with P11D Filing?
At Business At, we offer proactive P11D compliance support with real-time answers, available 7 days a week.
Book a free consultation to streamline your reporting and avoid penalties.
Sources:
- Expenses and benefits for employers: Deadlines - GOV.UK
- 2026: Class 1A National Insurance contributions on benefits in kind, termination payments and sporting testimonial payments - GOV.UK
- Changes to employer provided benefits policy and administration - GOV.UK
- Confirming plans to mandate the reporting of benefits in kind via payroll software from April 2026 - GOV.UK
- Mandatory payrolling of benefits in kind and expenses – interim guidance and legislation - Introduction - Guidance - GOV.UK
