P11D Benefits in Kind: How Are Employee Perks Taxed? (2026/27)

If your employer provides perks beyond salary — a company car, private health cover, a gym subsidy, or even an interest-free loan — HMRC treats the value of those perks as taxable income. These are known as benefits in kind (BIK), reported via the P11D process.

Understanding how your benefits are taxed helps you check your tax code is correct, compare a benefits-heavy package against a cash salary, and make informed choices about salary sacrifice.

What Is a Benefit in Kind (BIK)?

A benefit in kind is anything of value that your employer provides beyond your cash salary. HMRC taxes the “cash equivalent” of the benefit as though you had received it as income.

Common benefits in kind:

How BIK Is Taxed

The cash equivalent value of the benefit is added to your income. You pay income tax at your marginal rate on that amount. Employer NI (Class 1A) at 15% is also payable by your employer on most benefits.

Formula: Extra tax = Cash equivalent value × Your income tax rate

Example: Private Medical Insurance

• Annual premium: £1,800
• Employee is a 40% taxpayer
• Additional income tax: 40% × £1,800 = £720/year
• Employer’s Class 1A NI: 15% × £1,800 = £270/year (cost to employer)

Company Cars: How BIK Is Calculated

Company cars are the most significant BIK for most employees. The taxable value is:

Cash equivalent = List price × BIK percentage

The BIK percentage is set by HMRC based on the car’s CO2 emissions per kilometre:

Example — £35,000 petrol car, 120 g/km CO2:

• BIK rate: 29%
• Annual taxable benefit: 29% × £35,000 = £10,150
• Tax at 40%: £4,060/year
• Net monthly cost to employee (after tax deducted): ~£338/month

Same car — electric:

• BIK rate: 3%
• Annual taxable benefit: 3% × £35,000 = £1,050
• Tax at 40%: £420/year
• Net monthly cost to employee: ~£35/month

The shift to an electric company car can save employees thousands per year in BIK tax.

Company Vans

Company vans used for private journeys have a flat-rate BIK:

• Van benefit charge 2026/27: £3,960 per year
• Fuel benefit charge (if employer pays for private fuel): £757 per year

A 20% taxpayer with a company van pays: 20% × £3,960 = £792/year.

Interest-Free and Low-Interest Loans

If your employer provides a loan of more than £10,000 at no or below-market interest, HMRC taxes the benefit as the difference between the actual interest and the official rate.

• HMRC official rate 2026/27: 2.25% (check HMRC site for updates)
• Benefit = (Official rate × loan balance) − actual interest paid

Example:

• Employer loan: £30,000 at 0% interest
• Benefit: 2.25% × £30,000 = £675/year
• Tax at 20%: £135/year

Loans under £10,000 are fully exempt. This is why many employers offer season ticket loans or relocation loans up to this limit without triggering a BIK charge.

Living Accommodation

Employer-provided housing is a significant BIK valued in two ways:

1. Basic accommodation charge: Higher of annual value (rateable value) or cost of providing the accommodation (if cost exceeds £75,000)
2. Additional charge: For properties costing over £75,000 — (cost − £75,000) × official rate

Exceptions apply for accommodation provided for security reasons, in an employer’s premises, or where the employee is a minister of religion.

The P11D Process

Employers must submit a P11D form for each employee who receives taxable benefits.

Key dates:

• 5 April: End of tax year
• 6 July: P11D forms due to HMRC and to employees
• 22 July: Class 1A NI payment due (if paid electronically)
• 31 January: Any employee tax on BIK due (if via Self-Assessment)

What Happens with Your Tax Code?

HMRC typically adjusts your PAYE tax code to collect the BIK tax throughout the year. For example, if you have £2,000 of BIK, your code is adjusted down by £2,000 — reducing your tax-free pay, resulting in higher monthly tax deductions.

Payrolling Benefits: The New Standard (From April 2026)

From April 2026, most employers must payroll benefits — adding the monthly taxable value of BIK to employees’ gross pay on each payslip, with tax deducted in real time.

Benefits that remain outside payrolling in certain cases include accommodation and beneficial loans — ask your employer for details.

Salary Sacrifice and BIK

Using salary sacrifice to fund benefits (e.g., lease a car through salary sacrifice) usually means:

• You give up gross salary, reducing income tax and NI
• You receive the benefit in kind
• Tax is payable on the BIK value OR the salary sacrificed — whichever is higher

This mostly neutralises the advantage for cars and most other benefits. However, salary sacrifice into pensions, childcare, and ultra-low emission vehicles retains full tax advantages.

Checking Your BIK Tax Is Correct

1. Check your P11D (issued by your employer by 6 July each year)
2. Compare to your tax code — the BIK estimated value should be deducted from your code
3. If the amount seems wrong, contact HMRC or your employer’s payroll department
4. For large or unusual benefits, consider filing a Self-Assessment return to ensure accuracy

Related Guides

• Director Salary and Dividend Mix 2026/27
• Salary Sacrifice Pension Guide
• Company Car vs Car Allowance: Which Is Better?
• Self-Assessment Tax Return Guide
• Mileage Allowance Rates Guide