UK HR Term
P11D
A P11D is the UK form an employer files annually with HMRC to report the cash equivalent value of any taxable benefits in kind provided to employees, such as company cars, private medical insurance, or interest-free loans.
In plain English
If you give an employee anything of value beyond their normal pay — a company car, private medical insurance, a low-interest loan, a phone they use personally, a season ticket loan above £10,000 — HMRC wants to know the cash equivalent so it can tax them on it. The P11D is the form that reports those benefits.
When it's filed
Once a year, by 6 July following the tax year end (so for the 2025–26 tax year, by 6 July 2026). Late filing triggers an automatic £100 fine, escalating monthly.
Who completes it
The employer files one P11D per employee who received reportable benefits, plus a single P11D(b) summarising the Class 1A National Insurance contributions due.
What's not on a P11D
Benefits that are payrolled (registered with HMRC in advance and processed through PAYE) don't go on the P11D — they're already taxed in real time. Many employers have moved to payrolling benefits to avoid the annual filing. From April 2026, payrolling becomes mandatory for most benefits in kind.
Examples of reportable benefits
- Company cars and fuel
- Private medical and dental insurance
- Beneficial loans over £10,000
- Living accommodation
- Mileage payments above the AMAP rate
- Non-business use of company assets