P11D Benefits in Kind Calculator

A P11D is a form that employers must submit to HMRC to report the cash equivalent value of benefits and expenses provided to employees and directors (historically £8,500+ earners, but the threshold was abolished and now all employees are covered). It's filed after the end of the tax year, with the P11D deadline being 6 July following the tax year. Employers must also submit a P11D(b) to report the total Class 1A NIC due, and give each employee a copy of their P11D details by the same date.

The company car BIK is calculated as: list price of the car × appropriate percentage (based on CO2 emissions). For 2026/27, zero-emission electric cars are taxed at 4% of list price. Cars with CO2 of 1-50g/km are taxed from 4% (electric range 130+ miles) up to 16% (under 30 miles range), depending on the car's electric-only mileage. Standard petrol/diesel cars are taxed from 17% (51-54g/km) up to a maximum of 37% (155g/km and above). A separate fuel benefit applies if the employer also pays for private fuel — the 2026/27 fuel benefit multiplier is £29,200, multiplied by the same CO2 percentage.

Class 1A National Insurance is the employer's NIC charge on benefits in kind reported on P11D forms. The rate for 2026/27 is 15% of the total P11D value. Class 1A NIC is due by 19 July (22 July for electronic payment) following the end of the tax year — so for benefits provided in 2025/26, the P11D is due 6 July 2026 and Class 1A NIC by 19 July 2026. Unlike normal NIC, Class 1A is paid by the employer only; employees never pay NIC on their P11D benefits.

The trivial benefits exemption lets employers give employees non-cash gifts costing £50 or less (including VAT) without any income tax, NIC, or P11D reporting. The benefit must not be cash or a cash voucher, a reward for performance, or contractually promised — and if it costs £50.01, the whole benefit becomes taxable (no apportionment). For close company directors there's a separate annual cap of £300 for trivial benefits in total.

Yes. Since April 2016, employers can voluntarily payroll benefits in kind instead of filing P11D forms, by registering with HMRC before the start of the tax year. Payrolled benefits still need a P11D(b) for Class 1A NIC, but not an individual P11D. Mandatory payrolling of most benefits, originally planned for April 2026, was delayed by HMRC and now starts from April 2027.

OpRA applies where an employee gives up salary in exchange for a benefit (salary sacrifice). Since April 2017, the taxable value under OpRA is the higher of the normal cash equivalent or the salary given up — removing the tax advantage for most benefits like gym membership, bikes bought outright, and most car schemes. Exceptions that still save tax and NIC include pension contributions, cycle-to-work schemes, and ultra-low emission vehicles (below 75g/km CO2).

No. Employees do not pay National Insurance on P11D benefits — only income tax applies, via Self Assessment or a PAYE tax code adjustment. The employer pays Class 1A NIC at 15% on the total P11D value, entirely at the employer's cost. This is one reason benefits in kind can be more tax-efficient than equivalent salary: on a £5,000 benefit, an employee earning above £50,270 saves the 2% employee NIC they'd otherwise pay on salary.

Failure to file P11Ds by 6 July results in a penalty of £100 per 50 employees for each month (or part month) late, up to 12 months, plus interest on late Class 1A NIC. If benefits go unreported, HMRC can raise an assessment for the unpaid tax and NIC, plus interest and penalties, going back up to 20 years for fraud or deliberate concealment. Always file on time with provisional values if needed, and amend later.